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STOCK BASED COMPENSATION | 6 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
STOCK BASED COMPENSATION | STOCK BASED COMPENSATION Stock-Based Compensation Plans The Company’s 2010 Equity Incentive Plan and 2005 Equity Incentive Plan are described in its Annual Report. As of December 31, 2018, the Company had 10,574,283 authorized shares available for future issuance under all of its stock incentive plans. Stock-Based Compensation The following table shows total stock-based compensation expense included in the Consolidated Statements of Operations and Comprehensive Income (Loss) for the three and six months ended December 31, 2018 and 2017 (in thousands):
| Three Months Ended December 31, |  |  |  | Six Months Ended December 31, |  |
| 2018 |  | 2017 |  | 2018 |  | 2017
Cost of revenues | $ | 261 |  | $ | 40 |  | $ | 294 |  | $ | 285
Research and development | 497 |  | 370 |  | 964 |  | 826
Sales, general and administrative | 21 |  | 370 |  | 296 |  | 581
| $ | 779 |  | $ | 780 |  | $ | 1,554 |  | $ | 1,692
Stock Options The following is a summary of option activity for the Company’s stock incentive plans for the six months ended December 31, 2018:
| Common Stock Options Outstanding |  |  |  |  |  |
| Number of Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value (In thousands)
Balance, June 30, 2018 | 137,491 |  | $ | 9.15 |  | 3.62 |  | $ | 10,390
Exercised | (36,126) |  | $ | 10.55 |  |  |  |
Balance, December 31, 2018 | 101,365 |  | $ | 8.66 |  | 3.12 |  | $ | 9,199
Vested as of December 31, 2018 | 101,365 |  | $ | 8.66 |  | 3.12 |  | $ | 9,199
Vested and exercisable as of December 31, 2018 | 101,365 |  | $ | 8.66 |  | 3.12 |  | $ | 9,199
During the three months ended December 31, 2018 and 2017, the aggregate intrinsic value of options exercised under the Company’s stock incentive plans was $1.9 million and $1.7 million, respectively, as determined as of the date of option exercise. During the six months ended December 31, 2018 and 2017, the aggregate intrinsic value of options exercised under the Company's stock incentive plans was $3.2 million and $5.5 million, respectively, as determined as of the date of option exercise. As of December 31, 2018, the Company had no unrecognized compensation costs related to stock options. The Company did not grant any employee stock options during the three and six months ended December 31, 2018 and 2017. Restricted Stock Units (“RSUs”) The following table summarizes the activity of the RSUs made by the Company:
| Number of Shares |  | Weighted Average Grant Date Fair Value Per Share
Non-vested RSUs, June 30, 2018 | 144,100 |  | $ | 53.24
RSUs granted | 39,261 |  | $ | 89.51
RSUs vested | (21,673) |  | $ | 49.57
RSUs canceled | (20,603) |  | $ | 57.95
Non-vested RSUs, December 31, 2018 | 141,085 |  | $ | 63.21
The intrinsic value of RSUs vested in the three months ended December 31, 2018 and 2017 was $1.1 million and $0.6 million, respectively. The intrinsic value of RSUs vested in the six months ended December 31, 2018 and 2017 was $2.0 million and $1.9 million, respectively. The total intrinsic value of all outstanding RSUs was $14.0 million as of December 31, 2018. As of December 31, 2018, there were unrecognized compensation costs related to RSUs of $6.3 million which the Company expects to recognize over a weighted average period of 3.7 years.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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