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Stock-based Compensation | 6 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Stock-based Compensation | Stock-based Compensation Equity Incentive Plan In January 2016, the Board of Directors approved the 2016 Equity Incentive Plan (the "2016 Plan") and reserved for issuance 4,700,000 shares of common stock for awards of stock options, stock appreciation rights, restricted stock, RSUs and other equity-based awards. The 2016 Plan was approved by the stockholders of the Company and became effective on March 8, 2016. As of the date the 2016 Plan became effective, 8,696,444 shares of common stock were reserved for outstanding awards under the Company's 2006 Equity Incentive Plan (the "2006 Plan"). Such awards remained outstanding under the 2006 Plan following the adoption of the 2016 Plan, although no further awards have been or will be granted under the 2006 Plan. Up to 2,800,000 shares subject to awards that remained outstanding under the 2006 Plan at the time the 2016 Plan became effective, if those awards were or are forfeited at any time after the 2016 Plan became effective, became available or will become available for use under the 2016 Plan. At the time the 2016 Plan became effective, all remaining ungranted shares under the 2006 Plan were canceled. Under the 2016 Plan, the exercise price per share for incentive stock options granted to employees owning shares representing more than 10% of the Company's outstanding voting stock at the time of grant cannot be less than 110% of the fair value of the underlying shares on the grant date. Nonqualified stock options and incentive stock options granted to all other persons are granted at a price not less than 100% of the fair value. Options generally expire ten years after the date of grant. Stock options and RSUs generally vest over four years; 25% at the end of one year and one sixteenth per quarter thereafter. Under the 2016 Plan, the Company granted PRSUs to its Chief Executive Officer, 50% of which vest based on the achievement of certain performance metrics at the end of the performance period while the remainder vest in equal amounts over the following ten quarters provided he continues to be employed by the Company. As of December 31, 2019, the Company had 463,411 authorized shares available for future issuance under the 2016 Plan. Determining Fair Value The Company's fair value of RSUs and PRSUs is based on the closing market price of the Company's common stock on the date of grant. The Company estimates the fair value of stock options granted using the Black-Scholes-option-pricing model. This fair value is then amortized ratably over the requisite service periods of the awards, which is generally the vesting period. The key inputs in using the Black-Scholes-option-pricing model were as follows: Expected Term—The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on the Company's historical experience. Expected Volatility—Expected volatility is based on the Company's historical volatility. Expected Dividend—The Black-Scholes valuation model calls for a single expected dividend yield as an input and the Company has no plans to pay dividends. Risk-Free Interest Rate—The risk-free interest rate used in the Black-Scholes valuation method is based on the United States Treasury zero coupon issues in effect at the time of grant for periods corresponding with the expected term of option. The fair value of stock option grants for the three and six months ended December 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 December 31, |  | Six Months Ended December 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
Risk-free interest rate | 1.72 | % |  | 2.97 | % |  | 1.58% - 1.72% |  |  | 2.87% - 2.97% |
Expected term | 6.27 years |  |  | 6.05 years |  |  | 6.27 years |  |  | 6.05 years |
Dividend yield | — | % |  | — | % |  | — | % |  | — | %
Volatility | 49.74 | % |  | 50.02 | % |  | 49.74% - 50.04% |  |  | 47.34% - 50.02% |
Weighted-average fair value | $ | 10.30 |  |  | $ | 6.62 |  |  | $ | 9.14 |  |  | $ | 8.77 |
The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three and six months ended December 31, 2019 and 2018 (in thousands):
| Three Months Ended December 31, |  | Six Months Ended December 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
Cost of sales | $ | 384 |  |  | $ | 428 |  |  | $ | 779 |  |  | $ | 866 |
Research and development | 3,126 |  |  | 3,212 |  |  | 6,256 |  |  | 6,708 |
Sales and marketing | 423 |  |  | 436 |  |  | 859 |  |  | 941 |
General and administrative | 1,031 |  |  | 1,171 |  |  | 2,124 |  |  | 2,606 |
Stock-based compensation expense before taxes | 4,964 |  |  | 5,247 |  |  | 10,018 |  |  | 11,121 |
Income tax impact | (1,131 | ) |  | (1,082 | ) |  | (2,283 | ) |  | (2,324 | )
Stock-based compensation expense, net | $ | 3,833 |  |  | $ | 4,165 |  |  | $ | 7,735 |  |  | $ | 8,797 |
As of December 31, 2019, $6.5 million of unrecognized compensation cost related to stock options is expected to be recognized over a weighted-average period of 2.53 years, $32.6 million of unrecognized compensation cost related to unvested RSUs is expected to be recognized over a weighted-average period of 2.81 years and $0.1 million of unrecognized compensation cost related to unvested PRSUs is expected to be recognized over a period of 1.0 year. Stock Option Activity The following table summarizes stock option activity during the six months ended December 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, 2019 |  | 7,374,635 |  |  | $ | 18.02 |  |  |
Granted |  | 160,600 |  |  | $ | 18.44 |  |  |
Exercised |  | (288,985 | ) |  | $ | 14.04 |  |  |
Forfeited/Cancelled |  | (358,006 | ) |  | $ | 8.69 |  |  |
Balance as of December 31, 2019 |  | 6,888,244 |  |  | $ | 18.68 |  |  | 3.77
Options vested and exercisable at December 31, 2019 |  | 6,152,154 |  |  | $ | 18.46 |  |  | 3.19
RSU and PRSU Activity In January 2015, the Company began to grant RSUs to employees. The Company grants RSUs to certain employees as part of its regular employee equity compensation review program as well as to selected new hires. RSUs are typically service based share awards that entitle the holder to receive freely tradable shares of the Company's common stock upon vesting. In August 2017, the Compensation Committee granted two PRSU awards to the Company's Chief Executive Officer, both of which have both performance and service conditions. The first award was a one-year PRSU and the second award was a two-year PRSU. The one-year PRSUs would be earned based on the Company’s performance as it relates to a revenue growth metric and a minimum non-GAAP operating margin metric during the fiscal year ended June 30, 2018 with eligibility up to 200% of the targeted number of units based on revenue growth if the minimum non-GAAP operating margin is achieved. If the performance metrics were met, 50% of the PRSUs would vest at June 30, 2018 while the remainder would vest in equal amounts over the following ten quarters if the Company's Chief Executive Officer continued to be employed during those ten quarters. In December 2019, the Compensation Committee of the Company's Board of Directors determined that the Company achieved the revenue and non-GAAP operating margin metrics for the fiscal year ended June 30, 2018 at a level that entitled the Chief Executive Officer to 200% of the originally targeted number of shares subject to the one-year PRSU. 50% of the PRSUs so earned were vested as of June 30, 2018, and an additional 30% of the PRSUs vested during the six quarters ended December 31, 2019, in accordance with the terms of the grant. The two-year PRSUs would be earned based on the Company’s performance for the average non-GAAP operating margin metric for the two fiscal years ended June 30, 2019 with eligibility up to 100% of the targeted number of units. If the performance metrics would have been met, 50% of the PRSUs would have vested at June 30, 2019 while the remainder would have been vested in equal amounts over the following ten quarters if the Chief Executive Officer continued to be employed during those ten quarters. In December 2019, the Compensation Committee of the Company's Board of Directors has determined that the Company did not achieve the required performance metrics for these two-year PRSUs to be earned and none of the two-year PRSUs vested. The following table summarizes RSUs and PRSUs activity during the six months ended December 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, 2019 | 1,873,102 |  |  | $ | 20.25 |  |  | 120,000 |  | (1) |  | $ | 27.10 |
Granted | 571,200 |  |  | $ | 18.91 |  |  | — |  |  |  |
Released (2) | (508,979 | ) |  | $ | 20.96 |  |  | — |  |  |  |
Forfeited | (86,559 | ) |  | $ | 18.49 |  |  | — |  |  |  |
Balance as of December 31, 2019 | 1,848,764 |  |  | $ | 19.72 |  |  | 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 96,000 PRSUs that were vested but not released as of December 31, 2019, of which 6,000 PRSUs vested during the three months ended December 31, 2019.

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