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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Dec. 31, 2018	Jan. 31, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	QNST
Entity Registrant Name	QUINSTREET, INC
Entity Central Index Key	0001117297
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		49,807,261

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Current assets:
Cash and cash equivalents	$ 62,447	$ 64,700
Accounts receivable, net	63,122	68,492
Prepaid expenses and other assets	4,927	4,432
Total current assets	130,496	137,624
Property and equipment, net	4,575	4,211
Goodwill	67,429	62,283
Other intangible assets, net	28,984	8,573
Deferred tax assets, noncurrent	50,132	60
Other assets, noncurrent	6,133	7,545
Total assets	287,749	220,296
Current liabilities:
Accounts payable	34,759	32,506
Accrued liabilities	28,592	34,811
Deferred revenue	892	715
Other liabilities	3,903
Total current liabilities	68,146	68,032
Other liabilities, noncurrent	8,397	3,938
Total liabilities	76,543	71,970
Commitments and contingencies (See Note 10)
Stockholders' equity:
Common stock: $0.001 par value; 100,000,000 shares authorized; 49,771,433 and 48,146,384 shares issued and outstanding at December 31, 2018 and June 30, 2018	50	48
Additional paid-in capital	282,493	277,761
Accumulated other comprehensive loss	(357)	(380)
Accumulated deficit	(70,980)	(129,103)
Total stockholders' equity	211,206	148,326
Total liabilities and stockholders' equity	$ 287,749	$ 220,296

Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands

3 Months Ended

6 Months Ended

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2018

Dec. 31, 2017

Income Statement [Abstract]

Net revenue

$ 104,096

$ 87,494

$ 216,965

$ 174,912

Cost of revenue

^[1]

90,915

75,239

187,728

151,179

Gross profit

13,181

12,255

29,237

23,733

Operating expenses:

Product development

^[1]

2,995

3,475

6,300

6,689

Sales and marketing

^[1]

2,283

2,597

4,327

5,044

General and administrative

^[1]

5,049

4,511

10,443

8,971

Operating income

2,854

1,672

8,167

3,029

Interest income

135

Interest expense

(98)

Other income, net

115

243

286

Income before taxes

2,940

1,951

8,252

3,388

Benefit from (provision for) taxes

49,886

(4)

49,871

Net income

$ 52,826

$ 1,947

$ 58,123

$ 3,392

Net income per share:

Basic

$ 1.07

$ 0.04

$ 1.18

$ 0.07

Diluted

$ 1.00

$ 0.04

$ 1.11

$ 0.07

Weighted-average shares used in computing net income per share:

Basic

49,490

45,974

49,077

45,776

Diluted

52,682

49,614

52,562

48,172

[1]	Cost of revenue and operating expenses include stock-based compensation expense as follows: Cost of revenue $2,001 $1,001 $3,540 $1,926 Product development 427 484 828 960 Sales and marketing 429 306 713 605 General and administrative 1,022 772 1,909 1,509

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 52,826	$ 1,947	$ 58,123	$ 3,392
Other comprehensive (loss) income:
Foreign currency translation adjustment	(55)	(26)	23	(17)
Total other comprehensive (loss) income	(55)	(26)	23	(17)
Comprehensive income	$ 52,771	$ 1,921	$ 58,146	$ 3,375

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Beginning Balance at Jun. 30, 2017	$ 118,082	$ 45		$ 263,533	$ (463)	$ (145,033)
Beginning Balance, Shares at Jun. 30, 2017		45,435,836
Issuance of common stock upon exercise of stock options	898			898
Issuance of common stock upon exercise of stock options, Shares		181,175
Release of restricted stock, net of share settlement		$ 1		(1)
Release of restricted stock, net of share settlement, Shares		697,210
Repurchase of common stock	(648)		$ (648)
Repurchase of common stock, Shares			(93,341)
Retirement of treasury stock			$ 648	(648)
Retirement of treasury stock, Shares		(93,341)	93,341
Stock-based compensation expense	5,035			5,035
Withholding taxes related to release of restricted stock, net of share settlement	(1,835)			(1,835)
Net income	3,392					3,392
Other comprehensive income (loss)	(17)				(17)
Ending Balance at Dec. 31, 2017	124,907	$ 46		266,982	(480)	(141,641)
Ending Balance, Shares at Dec. 31, 2017		46,220,880
Beginning Balance at Sep. 30, 2017	121,141	$ 46		265,137	(454)	(143,588)
Beginning Balance, Shares at Sep. 30, 2017		45,713,248
Issuance of common stock upon exercise of stock options	898			898
Issuance of common stock upon exercise of stock options, Shares		181,175
Release of restricted stock, net of share settlement, Shares		388,821
Repurchase of common stock	(523)		$ (523)
Repurchase of common stock, Shares			(62,364)
Retirement of treasury stock			$ 523	(523)
Retirement of treasury stock, Shares		(62,364)	62,364
Stock-based compensation expense	2,579			2,579
Withholding taxes related to release of restricted stock, net of share settlement	(1,109)			(1,109)
Net income	1,947					1,947
Other comprehensive income (loss)	(26)				(26)
Ending Balance at Dec. 31, 2017	124,907	$ 46		266,982	(480)	(141,641)
Ending Balance, Shares at Dec. 31, 2017		46,220,880
Beginning Balance at Jun. 30, 2018	$ 148,326	$ 48		277,761	(380)	(129,103)
Beginning Balance, Shares at Jun. 30, 2018	48,146,384	48,146,384
Issuance of common stock upon exercise of stock options	$ 5,124	$ 1		5,123
Issuance of common stock upon exercise of stock options, Shares		701,386
Release of restricted stock, net of share settlement		$ 1		(1)
Release of restricted stock, net of share settlement, Shares		923,663
Stock-based compensation expense	7,028			7,028
Withholding taxes related to release of restricted stock, net of share settlement	(7,418)			(7,418)
Net income	58,123					58,123
Other comprehensive income (loss)	23				23
Ending Balance at Dec. 31, 2018	$ 211,206	$ 50		282,493	(357)	(70,980)
Ending Balance, Shares at Dec. 31, 2018	49,771,433	49,771,433
Beginning Balance at Sep. 30, 2018	$ 153,025	$ 49		277,084	(302)	(123,806)
Beginning Balance, Shares at Sep. 30, 2018		49,145,985
Issuance of common stock upon exercise of stock options	3,072	$ 1		3,071
Issuance of common stock upon exercise of stock options, Shares		397,306
Release of restricted stock, net of share settlement, Shares		228,142
Stock-based compensation expense	3,899			3,899
Withholding taxes related to release of restricted stock, net of share settlement	(1,561)			(1,561)
Net income	52,826					52,826
Other comprehensive income (loss)	(55)				(55)
Ending Balance at Dec. 31, 2018	$ 211,206	$ 50		$ 282,493	$ (357)	$ (70,980)
Ending Balance, Shares at Dec. 31, 2018	49,771,433	49,771,433

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities
Net income	$ 58,123	$ 3,392
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,019	4,071
Provision for sales returns and doubtful accounts receivable	425	241
Stock-based compensation	6,990	5,000
Release of tax valuation allowance	(49,442)	0
Other adjustments, net	370	(272)
Changes in assets and liabilities:
Accounts receivable	7,655	(4,899)
Prepaid expenses and other assets	220	(44)
Deferred taxes	(597)	0
Accounts payable	2,138	169
Accrued liabilities	(7,659)	3,543
Deferred revenue	177	(396)
Other liabilities, noncurrent	460	(1,186)
Net cash provided by operating activities	22,879	9,619
Cash Flows from Investing Activities
Capital expenditures	(652)	(199)
Business acquisitions, net	(22,156)	(14,154)
Internal software development costs	(1,194)	(1,061)
Other investing activities	170	224
Net cash used in investing activities	(23,832)	(15,190)
Cash Flows from Financing Activities
Withholding taxes related to release of restricted stock, net of share settlement	(7,418)	(1,835)
Repurchases of common stock	0	(647)
Proceeds from exercise of common stock options	5,206	898
Net cash used in financing activities	(2,212)	(1,584)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	37	(10)
Net decrease in cash, cash equivalents and restricted cash	(3,128)	(7,165)
Cash, cash equivalents and restricted cash at beginning of period	65,588	50,459
Cash, cash equivalents and restricted cash at end of period	62,460	43,294
Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets
Cash and cash equivalents	62,447	42,406
Restricted cash included in other assets, noncurrent	$ 13	$ 888
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Cash, cash equivalents and restricted cash at end of period	$ 62,460	$ 43,294
Supplemental Disclosure of Cash Flow Information
Cash paid for income taxes	129	118
Accrued post-closing payments related to AmOne Corp. acquisition (see Note 7)	$ 7,514	$ 0

Summary of Significant Accounting Policies

6 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its subsidiaries. Intercompany balances and transactions have been eliminated in consolidation.

Unaudited Interim Financial Information

The accompanying condensed consolidated financial statements and the notes to the condensed consolidated financial statements as of December 31, 2018 and for the three and six months ended December 31, 2018 and 2017 are unaudited. These unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Accordingly, these interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2018, as filed with the SEC on September 12, 2018. The condensed consolidated balance sheet at June 30, 2018 included herein was derived from the audited financial statements as of that date, but does not include all disclosures, including notes, required by GAAP.

The unaudited interim condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and, in the opinion of management, include all adjustments (consisting only of normal recurring adjustments) necessary for the fair presentation of the Company’s condensed consolidated balance sheet at December 31, 2018, its condensed consolidated statements of stockholders’ equity, operations and comprehensive income for the three and six months ended December 31, 2018 and 2017 and condensed consolidated statements of cash flows for the six months ended December 31, 2018 and 2017. The results of operations for the three and six months ended December 31, 2018 are not necessarily indicative of the results to be expected for the fiscal year ending June 30, 2019, or any other future period.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the period. On an ongoing basis, management evaluates these estimates, judgments and assumptions, including those related to revenue recognition, stock-based compensation, goodwill, long-lived assets, contingencies, and income taxes. The Company bases these estimates on historical and anticipated results and trends and on various other assumptions that the Company believes are reasonable under the circumstances, including assumptions as to future events. These estimates form the basis for making judgments about the carrying values of assets and liabilities and recorded revenue and expenses that are not readily apparent from other sources. Actual results could differ from those estimates, and such differences could affect the results of operations reported in future periods.

Accounting Policies

The significant accounting policies are described in Note 2, Summary of Significant Accounting Policies, to the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2018.

Revenue Recognition

The Company derives revenue primarily from fees earned through the delivery of qualified clicks, leads, inquiries, calls, applications, customers and, to a lesser extent, display advertisements, or impressions. As of July 1, 2018, the Company adopted ASC 606, Revenue from Contracts with Customers (ASC 606) which governs how the Company recognizes revenues in these arrangements. The Company applied the provisions of ASC 606 using the modified retrospective approach, with the cumulative effect of the adoption recognized as of July 1, 2018, to all contracts that had not been completed as of that date. Under ASC 606, the Company recognizes revenue when the Company transfers promised goods or services to clients in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company recognizes revenue pursuant to the five-step framework contained in ASC 606: (i) identify the contract with a client; (ii) identify the performance obligations in the contract, including whether they are distinct in the context of the contract; (iii) determine the transaction price, including the constraint on variable consideration; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the Company satisfies the performance obligations.

As part of determining whether a contract exists, probability of collection is assessed on a client-by-client basis at the outset of the contract. Clients are subjected to a credit review process that evaluates the clients’ financial position and the ability and intention to pay. If it is determined from the outset of an arrangement that the client does not have the ability or intention to pay, the Company will conclude that a contract does not exist and will continuously reassess its evaluation until the Company is able to conclude that a contract does exist.

Generally, the Company’s contracts specify the period of time as one month, but in some instances the term may be longer. However, for most of the Company’s contracts with clients, either party can terminate the contract at any time without penalty. Consequently, enforceable rights and obligations only exist on a day-to-day basis, resulting in individual daily contracts during the specified term of the contract or until one party terminates the contract prior to the end of the specified term.

The Company has assessed the services promised in its contracts with clients and has identified one performance obligation, which is a series of distinct services. Depending on the client’s needs, these services consist of a specified number or an unlimited number of clicks, leads, calls, applications, customers, etc. (hereafter collectively referred to as “marketing results”) to be delivered over a period of time. The Company satisfies these performance obligations over time as the services are provided. The Company does not promise to provide any other significant goods or services to its clients.

Transaction price is measured based on the consideration that the Company expects to receive from a contract with a client. The Company’s contracts with clients contain variable consideration as the price for an individual marketing result varies on a day-to-day basis depending on the market-driven amount a client has committed to pay. However, because the Company ensures the stated period of its contracts do not span multiple reporting periods, the contractual amount within a period is based on the number of marketing results delivered within the period. Therefore, the transaction price for any given period is fixed and no estimation of variable consideration is required.

If a marketing result delivered to a client does not meet the contractual requirements associated with that marketing result, the Company’s contracts allow for clients to return a marketing result generally within 5-10 days of having received the marketing result. Such returns are factored into the amount billed to the client on a monthly basis and consequently result in a reduction to revenue in the same month the marketing result is delivered. No warranties are offered to the Company’s clients.

The Company does not allocate transaction price as the Company has only one performance obligation and its contracts do not span multiple periods. Taxes collected from clients and remitted to governmental authorities are not included in revenue.

The Company bills clients monthly in arrears for the marketing results delivered during the preceding month. The Company’s standard payment terms are 30-60 days. Consequently, the Company does not have significant financing components in its arrangements.

Separately from the agreements the Company has with clients, the Company also has agreements with Internet search companies, third-party publishers and strategic partners to generate potential marketing results for its clients. The Company receives a fee from its clients and separately pays a fee to the Internet search companies, third-party publishers and strategic partners. The Company is the primary obligor in the transaction. As a result, the fees paid by its clients are recognized as revenue and the fees paid to its Internet search companies, third-party publishers and strategic partners are included in cost of revenue.

Concentrations of Credit Risk

The Company had one client that accounted for 21% and 23% of net revenue for the three and six months ended December 31, 2018 and 23% of net revenue for both the three and six months ended December 31, 2017. That same client accounted for 10% and 13% of net accounts receivable as of December 31, 2018 and June 30, 2018. One additional client accounted for 13% of net accounts receivable as of both December 31, 2018 and June 30, 2018. No other clients accounted for 10% or more of net revenue for the three and six months ended December 31, 2018 or 2017 or 10% or more of net accounts receivable as of December 31, 2018 or June 30, 2018.

Fair Value of Financial Instruments

The Company’s financial instruments consist principally of cash equivalents, accounts receivable, accounts payable and post-closing payments related to its acquisition of AmOne Corp. (“AmOne”). The fair value of the Company’s cash equivalents is determined based on quoted prices in active markets for identical assets for its money market funds. The recorded value and fair value of the post-closing payments as of December 31, 2018 was $7.6 million and was determined using observable market inputs. The recorded values of the Company’s accounts receivable and accounts payable approximate their current fair values due to the relatively short-term nature of these accounts.

Cash, Cash Equivalents and Restricted Cash

All highly liquid investments with maturities of three months or less at the date of purchase are classified as cash equivalents on the Company’s condensed consolidated balance sheets. As of December 31, 2018 and June 30, 2018, the Company held money market funds of $11.1 million and $10.9 million which are classified as cash equivalents. As of June 30, 2018, the Company maintained $0.9 million cash restricted as collateral for letters of credit. In the second quarter of fiscal year 2019, the cash restriction from the issuing financial institution was removed.

Recent Accounting Pronouncements

In May 2014, the FASB issued a new accounting standard update on revenue from contracts with clients. The new guidance provides that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In March and April 2016, the FASB amended this standard to clarify implementation guidance on principal versus agent considerations and the identification of performance obligations and licensing. In May 2016, the FASB amended this standard to address improvements to the guidance on collectability, noncash consideration, and completed contracts at transition as well as provide a practical expedient for contract modifications at transition and an accounting policy election related to the presentation of sales taxes and other similar taxes collected from customers. The new standard becomes effective for fiscal years beginning after December 15, 2017, and interim periods within those years with early adoption permitted. The Company adopted the new standard effective July 1, 2018 using the modified retrospective approach. The adoption of the standard did not have a material effect on any individual line within the Company’s condensed consolidated financial statements nor on the financial statements as a whole. Therefore, the Company has not included the impact of adoption by line item in its disclosures.

In February 2016, the FASB issued a new accounting standard update which replaces ASC 840, “Leases.” The new guidance requires a lessee to recognize on its balance sheet a right-of-use asset representing its right to use the underlying asset for the lease term and a lease liability representing its lease payment obligations. The guidance also requires a lessee to recognize a single lease cost, calculated so that the cost of the lease is allocated over the lease term, on a generally straight-line basis. The guidance becomes effective for fiscal years beginning after December 15, 2018, and interim periods within those years, with early adoption permitted. The Company is currently assessing the impact of this new guidance.

In November 2016, the FASB issued a new accounting standard update on the disclosure of restricted cash on the statement of cash flows. The new guidance requires the statement of cash flows explain the changes during a reporting period of the totals for cash, cash equivalents, restricted cash, and restricted cash equivalents. Additionally, amounts for restricted cash and restricted cash equivalents are to be included with cash and cash equivalents if the cash flow statement includes a reconciliation of the total cash balances for a reporting period. The Company adopted the new standard effective July 1, 2018. The adoption of this standard did not have a material impact on the Company’s condensed consolidated financial statements.

In January 2017, the FASB issued a new accounting standard update to simplify the measurement of goodwill by eliminating the Step 2 impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The new guidance requires an entity to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The new guidance becomes effective for goodwill impairment tests in fiscal years beginning after December 15, 2019, with early adoption permitted. The adoption of this standard is not expected to have an impact on the Company’s condensed consolidated financial statements.

In January 2017, the FASB issued a new accounting standard update which revises the definition of a business and provides new guidance in evaluating when a set of transferred assets and activities is a business. The Company adopted the new standard effective on July 1, 2018, on a prospective basis and the adoption of this standard did not have a material impact on the Company’s condensed consolidated financial statements.

In May 2017, the FASB issued a new accounting standard update to amend the scope of modification accounting for share-based payment arrangements. The amendments in the update provide guidance on the types of changes to the terms or conditions of share-based payment awards that would be required to apply modification accounting under ASC 718, Compensation-Stock Compensation. The new guidance became effective on July 1, 2018 and the adoption of this standard did not have a material impact on the Company’s condensed consolidated financial statements.

Revenue

6 Months Ended

Dec. 31, 2018

Revenue From Contract With Customer [Abstract]

Revenue

3. Revenue

Disaggregation of Revenue

The following table shows the Company’s net revenue disaggregated by vertical (in thousands):

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
Net revenue:
Financial Services	$	74,410	$	62,284	$	151,776	$	120,853
Education		16,214		15,423		38,653		33,570
Other		13,472		9,787		26,536		20,489
Total net revenue	$	104,096	$	87,494	$	216,965	$	174,912

Contract Balances

The following table provides information about contract liabilities from the Company’s contracts with its clients (in thousands):

	December 31,		June 30,
	2018		2018
Deferred revenue	$	892	$	715
Client deposits		669		684

The Company’s contract liabilities result from payments received in advance of revenue recognition and advance consideration received from clients, which precede the Company’s satisfaction of the associated performance obligation. Significant changes in the liability balances during the period relate to advance consideration received from clients, offset by revenue recognized of $4.0 million.

Net Income per Share

6 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Net Income per Share

4. Net Income per Share

Basic net income per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period. Diluted net income per share is computed by using the weighted-average number of shares of common stock outstanding, including potential dilutive shares of common stock assuming the dilutive effect of outstanding stock options and restricted stock units using the treasury stock method.

The following table presents the calculation of basic and diluted net income per share:

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
	(In thousands, except per share data)				(In thousands, except per share data)
Numerator:
Basic and Diluted:
Net income	$	52,826	$	1,947	$	58,123	$	3,392
Denominator:
Basic:
Weighted-average shares of common stock used in computing basic net income per share		49,490		45,974		49,077		45,776
Diluted:
Weighted-average shares of common stock used in computing basic net income per share		49,490		45,974		49,077		45,776
Weighted-average effect of dilutive securities:
Stock options		1,779		1,332		1,832		724
Restricted stock units		1,413		2,308		1,653		1,672
Weighted-average shares of common stock used in computing diluted net income per share		52,682		49,614		52,562		48,172
Net income per share:
Basic	$	1.07	$	0.04	$	1.18	$	0.07
Diluted	$	1.00	$	0.04	$	1.11	$	0.07
Securities excluded from weighted-average shares used in computing diluted net income per share because the effect would have been anti-dilutive: ⁽¹⁾		98		1,398		96		2,088

⁽¹⁾	These weighted-shares relate to anti-dilutive stock options and restricted stock units as calculated using the treasury stock method and could be dilutive in the future.

Acquisitions

6 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Acquisitions

7. Acquisitions

On October 1, 2018, the Company completed the purchase of AmOne, an online performance marketing company in the financial services client vertical, to broaden its publisher and customer relationships. In exchange for all outstanding shares of AmOne, the Company paid $23.0 million in cash upon closing (including $2.7 million cash for net assets acquired subject to post-closing adjustments) and $8.0 million in post-closing payments, payable in equal semi-annual installments over a two year period, with the first installment payable six months following the date of closing. As of December 31, 2018, the Company has a liability related to post-closing adjustments for net assets acquired of $0.1 million included in accrued liabilities on the Company’s condensed consolidated balance sheet. The total consideration was calculated as follows (in thousands):

	Estimated Fair Value
Cash	$	23,032
Post-closing adjustments for net assets acquired		138
Post-closing payments, net of imputed interest of $486		7,514
Total	$	30,684

As of December 31, 2018, the Company had recorded $3.9 million in other liabilities, current and $3.7 million in other liabilities, noncurrent, on the Company’s condensed consolidated balance sheet related to post-closing payments.

The acquisition was accounted for as a business combination and the results of operations of AmOne have been included in the Company’s results of operations as of October 1, 2018. The Company allocated the purchase price to identifiable assets acquired based on their estimated fair values. The excess of the purchase price over the aggregate fair value of the identifiable assets acquired was recorded as goodwill and is primarily attributable to synergies the Company expects to achieve related to the acquisition. The goodwill is deductible for tax purposes.

The following table summarizes the preliminary allocation of the purchase price and the estimated useful lives of the identifiable assets acquired as of the date of the acquisition (in thousands):

	Estimated Fair Value		Estimated Useful Life
Customer/publisher/advertiser relationships	$	21,300	7 years
Website/trade/domain names		900	15 years
Acquired technology and others		500	3 years
Net assets		2,838	n/a
Goodwill		5,146	Indefinite
Total	$	30,684

The Company is still finalizing the allocation of the purchase price to the individual assets acquired. Accordingly, these preliminary estimates are subject to change during the measurement period, which is the period subsequent to the acquisition date during which the acquirer may adjust the provisional amounts recognized for a business combination, not to exceed one year form the acquisition date. The final purchase price allocation, which may include changes in the allocations within intangible assets and between intangible assets and goodwill, as well as changes in the estimated useful lives of the intangible assets, will be determined when the Company has completed the detailed review of underlying inputs and assumptions used in its preliminary purchase price allocation.

The unaudited pro forma financial information in the table below summarizes the combined results of operations for the Company and AmOne as though AmOne had been acquired as of the beginning of fiscal year 2018. The unaudited pro forma financial information is presented for illustrative purposes only and do not necessarily reflect what the combined company’s results of operations would have been had the acquisition occurred as of the beginning of fiscal year 2018, nor is it necessarily indicative of the future results of operations of the combined company.

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
	(In thousands)				(In thousands)
Net revenue	$	104,096	$	92,663	$	223,455	$	185,673
Net income		52,846		2,862		59,379		5,293

The pro forma financial information for the three and six months ended December 31, 2018 includes the elimination of $20 thousand and $192 thousand of nonrecurring acquisition costs incurred by the Company that are directly related to the acquisition.

The change in the carrying amount of goodwill for the six months ended December 31, 2018 was as follows (in thousands):

	Goodwill
Balance at June 30, 2018	$	62,283
Additions		5,146
Balance at December 31, 2018	$	67,429

Intangible Assets

6 Months Ended

Dec. 31, 2018

Finite Lived Intangible Assets Net [Abstract]

Intangible Assets

8. Intangible Assets

Intangible assets, net, consisted of the following (in thousands):

	December 31, 2018							June 30, 2018
	Gross					Net		Gross					Net
	Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	Amount		Amortization			Amount		Amount		Amortization			Amount
Customer/publisher/advertiser relationships	$	62,399	$	(38,494	)	$	23,905	$	41,101	$	(37,286	)	$	3,815
Content		60,959		(60,928	)		31		60,969		(60,930	)		39
Website/trade/domain names		31,995		(29,775	)		2,220		31,098		(29,369	)		1,729
Acquired technology and others		39,399		(36,571	)		2,828		38,900		(35,910	)		2,990
Total	$	194,752	$	(165,768	)	$	28,984	$	172,068	$	(163,495	)	$	8,573

Amortization of intangible assets was $1.5 million and $2.2 million for the three and six months ended December 31, 2018 and $0.7 million and $1.8 million for the three and six months ended December 31, 2017.

Future amortization expense for the Company’s intangible assets as of December 31, 2018 was as follows (in thousands):

Fiscal Year Ending June 30,	Amortization
2019 (remaining six months)	$	3,071
2020		6,081
2021		4,761
2022		3,678
2023		3,446
Thereafter		7,947
Total	$	28,984

Commitments and Contingencies

6 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

10. Commitments and Contingencies

Leases

The Company leases office space under non-cancelable operating leases with various expiration dates through fiscal year 2026. Rent expense was $1.0 million and $2.0 million for the three and six months ended December 31, 2018 and $0.8 million and $1.6 million for the three and six months ended December 31, 2017. The Company recognizes rent expense on a straight-line basis over the lease period and accrues for rent expense incurred but not paid.

Future annual minimum lease payments under noncancelable operating leases as of December 31, 2018 were as follows (in thousands):

	Operating
Fiscal Year Ending June 30,	Leases
2019 (remaining six months)	$	842
2020		3,323
2021		4,017
2022		3,989
2023		3,675
Thereafter		1,416
Total	$	17,262

Guarantor Arrangements

The Company has agreements whereby it indemnifies its officers and directors for certain events or occurrences while the officer or director is, or was, serving at the Company’s request in such capacity. The term of the indemnification period is for the officer or director’s lifetime. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has a director and officer insurance policy that limits its exposure and enables the Company to recover a portion of any future amounts under certain circumstances and subject to deductibles and exclusions. As a result of its insurance policy coverage, the Company believes the estimated fair value of these indemnification agreements is not material. Accordingly, the Company had no liabilities recorded for these agreements as of December 31, 2018 and June 30, 2018.

In the ordinary course of its business, the Company from time to time enters into standard indemnification provisions in its agreements with its clients. Pursuant to these provisions, the Company may be obligated to indemnify its clients for certain losses suffered or incurred, including losses arising from violations of applicable law by the Company or by its third-party publishers, losses arising from actions or omissions of the Company or its third-party publishers, and for third-party claims that a Company product infringed upon any United States patent, copyright or other intellectual property rights. Where practicable, the Company limits its liabilities under such indemnities. Subject to these limitations, the term of such indemnification provisions is generally coterminous with the corresponding agreements but may extend for the duration of the applicable statute of limitations after termination of the agreement. The potential amount of future payments to defend lawsuits or settle indemnified claims under these indemnification provisions is generally limited and the Company believes the estimated fair value of these indemnity provisions is not material. Accordingly, the Company had no liabilities recorded for these agreements as of December 31, 2018 and June 30, 2018.

Lending Commitments

In the third quarter of fiscal 2018, the Company entered into an unsecured revolving promissory note as a lender, as part of a strategic partnership intended to increase the Company’s presence in the emerging technology career education market. The principal balance at any time cannot exceed $2.5 million and any outstanding principal balance bears interest at 6.00% payable monthly. Repayment of the principal balance can occur without premium or penalty in whole or in part at any time. In the event of an equity offering by the borrower, any outstanding principal balance may be converted to equity securities at the mutual agreement of the Company and borrower. The principal balance and any accrued interest is due on January 1, 2019. No amounts were outstanding as of December 31, 2018. The promissory note expired on January 1, 2019 and was not renewed.

Letters of Credit

The Company has a $0.4 million letter of credit agreement with a financial institution that is used as collateral for fidelity bonds placed with an insurance company and a $0.5 million letter of credit agreement with a financial institution that is used as collateral for the Company’s corporate headquarters’ operating lease. The letters of credit automatically renew annually without amendment unless cancelled by the financial institutions within 30 days of the annual expiration date.

Stock Benefit Plans

6 Months Ended

Dec. 31, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Benefit Plans

12. Stock Benefit Plans

Stock Incentive Plans

The Company may grant incentive stock options (“ISOs”), nonstatutory stock options (“NQSOs”), restricted stock, restricted stock units (“RSUs”), stock appreciation rights, performance-based stock awards, and other forms of equity compensation, as well as performance cash awards, under its 2010 Equity Incentive Plan (the “2010 Incentive Plan”). The Company may grant NQSOs and RSUs to non-employee directors under the 2010 Non-Employee Directors’ Stock Award Plan (the “Directors’ Plan”). Prior to fiscal year 2016, the Company granted RSUs with a service condition (“service-based RSUs”). In fiscal year 2016, the Company also began granting to employees RSUs with a market condition (“market-based RSUs”) that requires that the Company’s stock price achieve a specified price above the grant date stock price before it can be eligible for service vesting conditions. In fiscal year 2019, the Company began granting to employees RSUs with a performance condition (“performance-based RSUs”) that vest variably subject to the achievement of revenue growth and adjusted EBITDA targets. The Company evaluates the portion of the awards that are probable to vest quarterly until the performance criteria are met. To date, the Company has issued ISOs, NQSOs, service-based RSUs, market-based RSUs, and performance-based RSUs under its stock incentive plans.

As of December 31, 2018, 20,599,689 shares were reserved and 14,789,389 shares were available for issuance under the 2010 Incentive Plan; 4,333,939 shares were reserved and 2,279,127 shares were available for issuance under the Directors’ Plan.

Stock-Based Compensation

The Company estimates the fair value of stock options at the date of grant using the Black-Scholes option-pricing model. Options are granted with an exercise price equal to the closing price of the Company’s common stock on the date of grant.

The weighted-average Black-Scholes model assumptions for the three and six months ended December 31, 2018 and 2017 were as follows:

	Three Months Ended						Six Months Ended
	December 31,						December 31,
	2018			2017			2018			2017
Expected term (in years)		4.0		4.4				4.2		4.6
Expected volatility		56	%		49	%		55	%		47	%
Expected dividend yield		—			—			—			—
Risk-free interest rate		2.9	%		2.0	%		2.9	%		1.8	%
Grant date fair value	$	6.56		$	3.09		$	6.56		$	1.73

The Company estimates the fair value of market-based RSUs at the date of the grant using the Monte Carlo simulation model. There were no grants of market-based RSUs during the six months ended December 31, 2018. The weighted-average Monte Carlo simulation model assumptions for the three and six months ended December 31, 2017 were as follows:

	December 31, 2017
	Three Months Ended			Six Months Ended
Expected term (in years)		4.0			4.0
Expected volatility		48	%		48	%
Expected dividend yield		—			—
Risk-free interest rate		2.1	%		2.0	%
Grant date fair value	$	6.16		$	5.25

The Company estimates the fair value of service-based RSUs and performance-based RSUs based on the closing price of the Company’s common stock on the grant date. Compensation expense is amortized net of estimated forfeitures on a straight-line basis over the requisite service period of the stock-based compensation awards.

Segment Information

6 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Segment Information

13. Segment Information

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or decision making group, in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker, its chief executive officer, reviews financial information presented on a consolidated basis and no expense or operating income is evaluated at a segment level. Given the consolidated level of review by the Company’s chief executive officer, the Company operates as one reportable segment.

The following tables set forth net revenue and long-lived assets by geographic area (in thousands):

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
Net revenue:
United States	$	102,247	$	85,798	$	213,035	$	170,868
International		1,849		1,696		3,930		4,044
Total net revenue	$	104,096	$	87,494	$	216,965	$	174,912

	December 31,		June 30,
	2018		2018
Property and equipment, net:
United States	$	4,295	$	3,875
International		280		336
Total property and equipment, net	$	4,575	$	4,211

	December 31,		June 30,
	2018		2018
Other intangible assets, net:
United States	$	28,884	$	8,441
International		100		132
Total other intangible assets, net	$	28,984	$	8,573

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company and its subsidiaries. Intercompany balances and transactions have been eliminated in consolidation.

Unaudited Interim Financial Information

Use of Estimates

Accounting Policies

Revenue Recognition

Concentrations of Credit Risk

Fair Value of Financial Instruments

Cash, Cash Equivalents and Restricted Cash

Recent Accounting Pronouncements

Net Income per Share

Fair Value Measurements

5. Fair Value Measurements

Fair value is defined as the price that would be received on sale of an asset or paid to transfer a liability (exit price) in an orderly transaction between market participants at the measurement date. The FASB has established a fair value hierarchy that distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3).

The three levels of the fair value hierarchy under the guidance for fair value measurement are described below:

Level 1 —

Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Pricing inputs are based upon quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. The valuations are based on quoted prices of the underlying security that are readily and regularly available in an active market, and accordingly, a significant degree of judgment is not required. As of December 31, 2018 and June 30, 2018, the Company used Level 1 assumptions for its money market funds.

Level 2 —

Pricing inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. As of December 31, 2018, the Company used Level 2 assumptions for its post-closing payments. As of June 30, 2018, the Company did not have any Level 2 financial assets or liabilities.

Level 3 —

Pricing inputs are generally unobservable for the assets or liabilities and include situations where there is little, if any, market activity for the investment. The inputs into the determination of fair value require management’s judgment or estimation of assumptions that market participants would use in pricing the assets or liabilities. The fair values are therefore determined using model-based techniques that include option pricing models, discounted cash flow models, and similar techniques. As of December 31, 2018 and June 30, 2018, the Company did not have any Level 3 financial assets or liabilities.

Stock Repurchases

The Company’s accounting policy upon the retirement of treasury stock is to deduct its par value from common stock and reduce additional paid-in capital by the amount recorded in additional paid-in capital when the stock was originally issued.

Segment Information

Revenue (Tables)

6 Months Ended

Dec. 31, 2018

Revenue From Contract With Customer [Abstract]

Schedule of Disaggregation of Net Revenue

The following table shows the Company’s net revenue disaggregated by vertical (in thousands):

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
Net revenue:
Financial Services	$	74,410	$	62,284	$	151,776	$	120,853
Education		16,214		15,423		38,653		33,570
Other		13,472		9,787		26,536		20,489
Total net revenue	$	104,096	$	87,494	$	216,965	$	174,912

Schedule of Contract Liabilities From Contracts With Clients

The following table provides information about contract liabilities from the Company’s contracts with its clients (in thousands):

	December 31,		June 30,
	2018		2018
Deferred revenue	$	892	$	715
Client deposits		669		684

Net Income per Share (Tables)

6 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Net Income per Share

The following table presents the calculation of basic and diluted net income per share:

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
	(In thousands, except per share data)				(In thousands, except per share data)
Numerator:
Basic and Diluted:
Net income	$	52,826	$	1,947	$	58,123	$	3,392
Denominator:
Basic:
Weighted-average shares of common stock used in computing basic net income per share		49,490		45,974		49,077		45,776
Diluted:
Weighted-average shares of common stock used in computing basic net income per share		49,490		45,974		49,077		45,776
Weighted-average effect of dilutive securities:
Stock options		1,779		1,332		1,832		724
Restricted stock units		1,413		2,308		1,653		1,672
Weighted-average shares of common stock used in computing diluted net income per share		52,682		49,614		52,562		48,172
Net income per share:
Basic	$	1.07	$	0.04	$	1.18	$	0.07
Diluted	$	1.00	$	0.04	$	1.11	$	0.07
Securities excluded from weighted-average shares used in computing diluted net income per share because the effect would have been anti-dilutive: ⁽¹⁾		98		1,398		96		2,088

⁽¹⁾	These weighted-shares relate to anti-dilutive stock options and restricted stock units as calculated using the treasury stock method and could be dilutive in the future.

Acquisitions (Tables)

6 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Schedule of Consideration

The total consideration was calculated as follows (in thousands):

	Estimated Fair Value
Cash	$	23,032
Post-closing adjustments for net assets acquired		138
Post-closing payments, net of imputed interest of $486		7,514
Total	$	30,684

Summary of Preliminary Allocation of Purchase Price and Estimated Useful Lives of the Identifiable Assets Acquired

The following table summarizes the preliminary allocation of the purchase price and the estimated useful lives of the identifiable assets acquired as of the date of the acquisition (in thousands):

	Estimated Fair Value		Estimated Useful Life
Customer/publisher/advertiser relationships	$	21,300	7 years
Website/trade/domain names		900	15 years
Acquired technology and others		500	3 years
Net assets		2,838	n/a
Goodwill		5,146	Indefinite
Total	$	30,684

Summary of Unaudited Pro Forma Financial Information Combined Results of Operations

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
	(In thousands)				(In thousands)
Net revenue	$	104,096	$	92,663	$	223,455	$	185,673
Net income		52,846		2,862		59,379		5,293

Change in Carrying Amount of Goodwill

The change in the carrying amount of goodwill for the six months ended December 31, 2018 was as follows (in thousands):

	Goodwill
Balance at June 30, 2018	$	62,283
Additions		5,146
Balance at December 31, 2018	$	67,429

Intangible Assets (Tables)

6 Months Ended

Dec. 31, 2018

Finite Lived Intangible Assets Net [Abstract]

Intangible Assets

Intangible assets, net, consisted of the following (in thousands):

	December 31, 2018							June 30, 2018
	Gross					Net		Gross					Net
	Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	Amount		Amortization			Amount		Amount		Amortization			Amount
Customer/publisher/advertiser relationships	$	62,399	$	(38,494	)	$	23,905	$	41,101	$	(37,286	)	$	3,815
Content		60,959		(60,928	)		31		60,969		(60,930	)		39
Website/trade/domain names		31,995		(29,775	)		2,220		31,098		(29,369	)		1,729
Acquired technology and others		39,399		(36,571	)		2,828		38,900		(35,910	)		2,990
Total	$	194,752	$	(165,768	)	$	28,984	$	172,068	$	(163,495	)	$	8,573

Amortization Expense

Future amortization expense for the Company’s intangible assets as of December 31, 2018 was as follows (in thousands):

Fiscal Year Ending June 30,	Amortization
2019 (remaining six months)	$	3,071
2020		6,081
2021		4,761
2022		3,678
2023		3,446
Thereafter		7,947
Total	$	28,984

Stock Benefit Plans (Tables)

6 Months Ended

Dec. 31, 2018

Stock options [Member]

Schedule of Weighted Average Assumptions

The weighted-average Black-Scholes model assumptions for the three and six months ended December 31, 2018 and 2017 were as follows:

	Three Months Ended						Six Months Ended
	December 31,						December 31,
	2018			2017			2018			2017
Expected term (in years)		4.0		4.4				4.2		4.6
Expected volatility		56	%		49	%		55	%		47	%
Expected dividend yield		—			—			—			—
Risk-free interest rate		2.9	%		2.0	%		2.9	%		1.8	%
Grant date fair value	$	6.56		$	3.09		$	6.56		$	1.73

Market-based RSUs [Member]

Schedule of Weighted Average Assumptions

The weighted-average Monte Carlo simulation model assumptions for the three and six months ended December 31, 2017 were as follows:

	December 31, 2017
	Three Months Ended			Six Months Ended
Expected term (in years)		4.0			4.0
Expected volatility		48	%		48	%
Expected dividend yield		—			—
Risk-free interest rate		2.1	%		2.0	%
Grant date fair value	$	6.16		$	5.25

Segment Information (Tables)

6 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Net Revenue and Long-Lived Assets by Geographic Area

The following tables set forth net revenue and long-lived assets by geographic area (in thousands):

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2018		2017		2018		2017
Net revenue:
United States	$	102,247	$	85,798	$	213,035	$	170,868
International		1,849		1,696		3,930		4,044
Total net revenue	$	104,096	$	87,494	$	216,965	$	174,912

	December 31,		June 30,
	2018		2018
Property and equipment, net:
United States	$	4,295	$	3,875
International		280		336
Total property and equipment, net	$	4,575	$	4,211

	December 31,		June 30,
	2018		2018
Other intangible assets, net:
United States	$	28,884	$	8,441
International		100		132
Total other intangible assets, net	$	28,984	$	8,573

Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2018 USD ($) Client	Dec. 31, 2017 Client	Dec. 31, 2018 USD ($) Client	Dec. 31, 2017 Client	Jun. 30, 2018 USD ($) Client
Summary Of Significant Accounting Policies [Line Items]
Money market funds \| $	$ 11.1		$ 11.1		$ 10.9
Restricted cash as collateral for letters of credit \| $	0.9		0.9		$ 0.9
AmOne Corp [Member]
Summary Of Significant Accounting Policies [Line Items]
Business combination, post-closing payments \| $	$ 7.6		$ 7.6
Customer Concentration Risk [Member] \| Net revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of clients accounted for more than 10% of net revenue	1	1	1	1
Concentration risk percentage accounted by major clients	21.00%	23.00%	23.00%	23.00%
Number of other clients accounted for more than 10% of net revenue	0	0	0	0
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of other clients accounted for more than 10% of net accounts receivable			0		0
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Client Two [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage accounted by major clients			10.00%		13.00%
Number of clients accounted for 10% or more than 10% of net accounts receivable			1		1
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Client One [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage accounted by major clients			13.00%		13.00%
Number of clients accounted for more than 10% of net accounts receivable			1		1

Net Income per Share - Calculation of Basic and Diluted Net Income per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

3 Months Ended

6 Months Ended

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2018

Dec. 31, 2017

Basic and Diluted:

Net income

$ 52,826

$ 1,947

$ 58,123

$ 3,392

Basic:

Weighted-average shares of common stock used in computing basic net income per share

49,490

45,974

49,077

45,776

Diluted:

Weighted-average shares of common stock used in computing basic net income per share

49,490

45,974

49,077

45,776

Weighted-average effect of dilutive securities:

Weighted-average shares of common stock used in computing diluted net income per share

52,682

49,614

52,562

48,172

Net income per share:

Basic

$ 1.07

$ 0.04

$ 1.18

$ 0.07

Diluted

$ 1.00

$ 0.04

$ 1.11

$ 0.07

Securities excluded from weighted-average shares used in computing diluted net income per share because the effect would have been anti-dilutive:

^[1]

1,398

2,088

Stock options [Member]

Weighted-average effect of dilutive securities:

Weighted-average effect of dilutive securities

1,779

1,332

1,832

724

Restricted stock units [Member]

Weighted-average effect of dilutive securities:

Weighted-average effect of dilutive securities

1,413

2,308

1,653

1,672

[1]	These weighted-shares relate to anti-dilutive stock options and restricted stock units as calculated using the treasury stock method and could be dilutive in the future.

Acquisitions - Additional Information (Detail) - AmOne Corp [Member] - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Oct. 01, 2018	Dec. 31, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Closing date of acquisition	Oct. 01, 2018
Cash paid upon closing	$ 23,032
Cash paid for net assets acquired	2,700
Business Combination, post-closing payments	$ 8,000
Business combination, deferred consideration payment period	2 years
Business combination, deferred consideration payment description			post-closing payments, payable in equal semi-annual installments over a two year period, with the first installment payable six months following the date of closing.
Other liabilities current related to post-closing payments		$ 3,900	$ 3,900
Other liabilities noncurrent related to post-closing payments		3,700	3,700
Nonrecurring Acquisition Cost [Member]
Business Acquisition [Line Items]
Acquisition costs		$ 20	$ 192
Accrued Liabilities [Member]
Business Acquisition [Line Items]
Business combination, liability related to post-closing adjustments for net asses acquired	$ 100

Commitments and Contingencies - Future Annual Minimum Lease Payments under Noncancelable Operating Leases (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Commitments And Contingencies Disclosure [Abstract]
2019 (remaining six months)	$ 842
2020	3,323
2021	4,017
2022	3,989
2023	3,675
Thereafter	1,416
Total	$ 17,262

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Oct. 31, 2017	Jul. 31, 2017	Nov. 30, 2016
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of outstanding shares authorized to repurchase							750,000
Stock repurchase program, value of shares repurchased		$ 523		$ 648
Maximum [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of outstanding shares authorized to repurchase					966,000	905,000
November 2016 Stock Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares repurchased and retired				30,977
Stock repurchase program, weighted average price				$ 3.99
Broker commission, per share				$ 0.03
Stock repurchase program, value of shares repurchased				$ 100
Stock repurchase program, completion date				2017-07
July 2017 Stock Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares repurchased and retired		62,364		62,364
Stock repurchase program, weighted average price		$ 8.36		$ 8.36
Broker commission, per share		$ 0.03		$ 0.03
Stock repurchase program, value of shares repurchased		$ 500		$ 500
Stock repurchase program, number of shares repurchased	0		0

Stock Benefit Plans - Schedule of Weighted Average Assumptions (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	4 years	4 years 4 months 24 days	4 years 2 months 12 days	4 years 7 months 6 days
Expected volatility	56.00%	49.00%	55.00%	47.00%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Risk-free interest rate	2.90%	2.00%	2.90%	1.80%
Grant date fair value	$ 6.56	$ 3.09	$ 6.56	$ 1.73
Market-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)		4 years		4 years
Expected volatility		48.00%		48.00%
Expected dividend yield		0.00%		0.00%
Risk-free interest rate		2.10%		2.00%
Grant date fair value		$ 6.16		$ 5.25

Revenue - Additional Information (Detail) $ in Millions	6 Months Ended
Revenue - Additional Information (Detail) $ in Millions	Dec. 31, 2018 USD ($)
Revenue From Contract With Customer [Abstract]
Revenue recognized	$ 4.0

Prepaid Expenses and Other Assets - Additional Information (Detail) - Partnership Agreement [Member] - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Prepaid expenses and other assets [Line Items]
Partnership agreement			10 years
Upfront cash payment			$ 10.0
Prepaid expenses and other assets	$ 1.0			$ 1.0		$ 1.0
Other assets, noncurrent	5.7			5.7		$ 6.3
Amortization expense	$ 0.3	$ 0.3		$ 0.6	$ 0.6

Acquisitions - Schedule of Consideration (Parenthetical) (Detail) $ in Thousands	Oct. 01, 2018 USD ($)
AmOne Corp [Member]
Business Acquisition [Line Items]
Post-closing payments net of imputed interest	$ 486

Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 194,752	$ 172,068
Accumulated Amortization	(165,768)	(163,495)
Net Carrying Amount	28,984	8,573
Customer/publisher/advertiser relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	62,399	41,101
Accumulated Amortization	(38,494)	(37,286)
Net Carrying Amount	23,905	3,815
Content [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	60,959	60,969
Accumulated Amortization	(60,928)	(60,930)
Net Carrying Amount	31	39
Website/trade/domain names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	31,995	31,098
Accumulated Amortization	(29,775)	(29,369)
Net Carrying Amount	2,220	1,729
Acquired technology and others [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	39,399	38,900
Accumulated Amortization	(36,571)	(35,910)
Net Carrying Amount	$ 2,828	$ 2,990

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Net benefit from income taxes	$ 49,886	$ (4)	$ 49,871	$ 4
Release of valuation allowance	$ 49,400		$ 49,400
U.S. federal corporate tax rate			21.00%		34.00%

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Dec. 31, 2018	Jun. 30, 2018
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	49,771,433	48,146,384
Common stock, shares outstanding	49,771,433	48,146,384

Revenue - Schedule of Contract Liabilities From Contracts With Clients (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Contract With Customer Asset And Liability [Abstract]
Deferred revenue	$ 892	$ 715
Client deposits	$ 669	$ 684

Acquisitions - Summary of Preliminary Allocation of Purchase Price and Estimated Useful Lives of Identifiable Assets Acquired (Detail) - USD ($) $ in Thousands	Oct. 01, 2018	Dec. 31, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Goodwill		$ 67,429	$ 62,283
AmOne Corp [Member]
Business Acquisition [Line Items]
Goodwill	$ 5,146
Total purchase price	30,684
AmOne Corp [Member] \| Customer/publisher/advertiser relationships [Member]
Business Acquisition [Line Items]
Estimated Fair Value	$ 21,300
Estimated Useful Life	7 years
AmOne Corp [Member] \| Website/trade/domain names [Member]
Business Acquisition [Line Items]
Estimated Fair Value	$ 900
Estimated Useful Life	15 years
AmOne Corp [Member] \| Acquired technology and others [Member]
Business Acquisition [Line Items]
Estimated Fair Value	$ 500
Estimated Useful Life	3 years
AmOne Corp [Member] \| Net assets [Member]
Business Acquisition [Line Items]
Estimated Fair Value	$ 2,838
Estimated Useful Life	0 years

Acquisitions - Change in Carrying Amount of Goodwill (Detail) $ in Thousands	6 Months Ended
	Dec. 31, 2018 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, Beginning	$ 62,283
Additions	5,146
Goodwill, Ending	$ 67,429

Intangible Assets - Amortization Expense (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Finite Lived Intangible Assets Future Amortization Expense [Abstract]
2019 (remaining six months)	$ 3,071
2020	6,081
2021	4,761
2022	3,678
2023	3,446
Thereafter	7,947
Net Carrying Amount	$ 28,984	$ 8,573

Commitments and Contingencies - Additional Information (Detail) - USD ($)	3 Months Ended			6 Months Ended
	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Commitments And Contingencies [Line Items]
Rent expense for office space	$ 1,000,000		$ 800,000	$ 2,000,000	$ 1,600,000
Leases expiration year				2026
Estimated fair value of indemnification agreements	0			$ 0		$ 0
Estimated fair value of indemnity provisions	0			0		$ 0
Letter of credit agreement with a financial institution that is used as collateral for fidelity bonds placed with an insurance company	400,000			400,000
Letter of credit agreement with a financial institution that is used as collateral for the Company's corporate headquarters' operating lease	500,000			$ 500,000
Letters of credit automatically renew annually without amendment on the annual expiration date				30 days
Unsecured Revolving Promissory Note [Member]
Commitments And Contingencies [Line Items]
Promissory note, principal amount		$ 2,500,000
Promissory note, interest rate percentage		6.00%
Promissory note, frequency of periodic interest receipts				Monthly
Promissory note, outstanding amount	$ 0			$ 0
Promissory note, expiration date				Jan. 01, 2019

Stock Benefit Plans - Additional Information (Detail)	6 Months Ended
Stock Benefit Plans - Additional Information (Detail)	Dec. 31, 2018 shares
Market-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of grants	0
2010 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance	20,599,689
Shares available for issuance	14,789,389
Directors' Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance	4,333,939
Shares available for issuance	2,279,127

Segment Information - Additional Information (Detail)	6 Months Ended
Segment Information - Additional Information (Detail)	Dec. 31, 2018 Segment
Segment Reporting [Abstract]
Number of reportable segments	1