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Stock-based Compensation (Tables) | 9 Months Ended
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Mar. 31, 2019
Share-based Payment Arrangement [Abstract] |
Schedule of assumptions used to estimate fair value of stock options granted using Black-Scholes option pricing model | The fair value of stock option grants for the three and nine months ended March 31, 2019 and 2018 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
| Three Months Ended March 31, |  | Nine Months Ended March 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
Risk-free interest rate | 2.56 | % |  | 2.47 | % |  | 2.56% - 2.97% |  |  | 1.92% - 2.47% |
Expected term | 6.05 years |  |  | 5.82 years |  |  | 6.05 years |  |  | 5.82 years |
Dividend yield | — | % |  | — | % |  | — | % |  | — | %
Volatility | 50.25 | % |  | 47.39 | % |  | 47.34% - 50.25% |  |  | 45.32% - 48.07% |
Weighted-average fair value | $ | 7.55 |  |  | $ | 10.79 |  |  | $ | 8.56 |  |  | $ | 11.45 |
Schedule of stock-based compensation expense | The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three and nine months ended March 31, 2019 and 2018 (in thousands):
| Three Months Ended March 31, |  | Nine Months Ended March 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
Cost of sales | $ | 390 |  |  | $ | 449 |  |  | $ | 1,256 |  |  | $ | 1,362 |
Research and development | 3,107 |  |  | 3,494 |  |  | 9,816 |  |  | 10,412 |
Sales and marketing | 418 |  |  | 482 |  |  | 1,359 |  |  | 1,545 |
General and administrative | 1,045 |  |  | 1,663 |  |  | 3,650 |  |  | 5,330 |
Stock-based compensation expense before taxes | 4,960 |  |  | 6,088 |  |  | 16,081 |  |  | 18,649 |
Income tax impact | (1,016 | ) |  | (1,506 | ) |  | (3,339 | ) |  | (5,385 | )
Stock-based compensation expense, net | $ | 3,944 |  |  | $ | 4,582 |  |  | $ | 12,742 |  |  | $ | 13,264 |
Summary of stock option activity | The following table summarizes stock option activity during the nine months ended March 31, 2019 under all plans:
|  | Options Outstanding |  | Weighted Average Exercise Price per Share |  | Weighted Average Remaining Contractual Term (in Years)
Balance as of June 30, 2018 |  | 8,301,138 |  |  | $ | 16.50 |  |  |
Granted |  | 321,920 |  |  | $ | 17.24 |  |  |
Exercised |  | — |  |  | $ | — |  |  |
Forfeited/Cancelled |  | (1,110,289 | ) |  | $ | 9.61 |  |  |
Balance as of March 31, 2019 |  | 7,512,769 |  |  | $ | 17.55 |  |  | 3.84
Options vested and exercisable at March 31, 2019 |  | 6,769,528 |  |  | $ | 17.13 |  |  | 3.32
Summary of restricted stock unit activity | The following table summarizes RSUs and PRSUs activity during the nine months ended March 31, 2019 under all plans:
| Time-Based RSUs Outstanding |  | Weighted Average Grant-Date Fair Value per Share |  | PRSUs Outstanding |  |  | Weighted Average Grant-Date Fair Value per Share
Balance as of June 30, 2018 | 1,480,605 |  |  | $ | 23.34 |  |  | 120,000 |  | (1) |  | $ | 27.10 |
Granted | 738,880 |  |  | $ | 16.46 |  |  | — |  |  |  |
Released (2) | (439,379 | ) |  | $ | 24.83 |  |  | — |  |  |  |
Forfeited | (114,018 | ) |  | $ | 20.76 |  |  | — |  |  |  |
Balance as of March 31, 2019 | 1,666,088 |  |  | $ | 20.08 |  |  | 120,000 |  |  |  | $ | 27.10 |
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(1) | Reflects the number of PRSUs that have been earned based on the achievement of performance metrics.
(2) | The number of shares released excludes 101,952 RSUs that were vested but not released as of March 31, 2019. The number of shares released excludes 78,000 PRSUs that were vested but not released as of March 31, 2019, of which 60,000 PRSUs were vested as of June 30, 2018. These vested RSUs and PRSUs will be released upon the effectiveness of the Company's Registration Statement on Form S-8.

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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