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STOCK BASED COMPENSATION (Tables) | 6 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-based compensation expense | 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
Summary of option activity for the company's stock incentive plans | 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
Activity of 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

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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=109197908&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=109197908&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=109197908&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=109197908&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=109197908&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=109197908&loc=d3e5070-113901 + Details
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