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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Jun. 30, 2019
STOCK-BASED COMPENSATION |
Schedule of stock based compensation expense in the condensed consolidated statements of operations | We recorded stock-based-compensation expense in the consolidated statement of operations as follows (in thousands):
|  | 2017 |  | 2018 |  | 2019
Cost of goods sold |  | $ | 1,443 |  | $ | 972 |  | $ | 732
Selling, general and administrative |  |  | 21,354 |  |  | 22,293 |  |  | 23,876
Research and development |  |  | 433 |  |  | 581 |  |  | 643
Restructuring |  |  | 2,902 |  |  | — |  |  | —
Stock based compensation expense |  | $ | 26,132 |  | $ | 23,846 |  | $ | 25,251
Schedule of weighted average assumptions used to determine the fair value calculations for stock options issued |
|  | 2017 |  | 2018 |  | 2019 |
Expected dividend |  | — |  | — |  | — |
Risk-free interest rate |  | 1.7 | % | 1.9 | % | 2.6 | %
Expected volatility |  | 33.0 | % | 29.0 | % | 28.0 | %
Expected holding period (in years) |  | 4.5 |  | 4.5 |  | 4.5 |
Summary of stock option activity |
|  |  |  | Weighted- |  |  |  |  |
|  |  |  | Average |  | Weighted-Average |  | Aggregate
|  | Number of |  | Exercise |  | Remaining Contractual |  | Intrinsic Value
|  | Options |  | Price |  | Term |  | (in thousands)
Outstanding at June 30, 2016 |  | 934,112 |  |  | 28.67 |  |  |  |  |
Granted |  | 19,176 |  |  | 73.42 |  |  |  |  |
Exercised |  | (168,564) |  |  | 26.68 |  |  |  |  |
Expired or forfeited |  | (4,053) |  |  | 68.28 |  |  |  |  |
Outstanding at June 30, 2017 |  | 780,671 |  | $ | 30.00 |  |  |  |  |
Granted |  | 25,379 |  |  | 85.83 |  |  |  |  |
Exercised |  | (121,651) |  |  | 23.53 |  |  |  |  |
Expired or forfeited |  | (6,874) |  |  | 73.77 |  |  |  |  |
Outstanding at June 30, 2018 |  | 677,525 |  | $ | 32.80 |  |  |  |  |
Granted |  | 19,259 |  |  | 73.37 |  |  |  |  |
Exercised |  | (169,799) |  |  | 32.11 |  |  |  |  |
Expired or forfeited |  | (11,101) |  |  | 70.50 |  |  |  |  |
Outstanding at June 30, 2019 |  | 515,884 |  | $ | 33.74 |  | 2.2 years |  | $ | 40,700
Exercisable at June 30, 2019 |  | 479,547 |  | $ | 30.36 |  | 1.7 years |  | $ | 39,454
Summary of restricted stock award and RSU award activity |
|  |  |  | Weighted-
|  |  |  | Average
|  | Shares |  | Fair Value
Nonvested at June 30, 2016 |  | 530,498 |  | $ | 67.94
Granted |  | 379,888 |  |  | 64.55
Vested |  | (299,277) |  |  | 67.87
Net replacement RSUs (1) |  | 20,953 |  |  | 67.76
Forfeited |  | (20,375) |  |  | 68.34
Nonvested at June 30, 2017 |  | 611,687 |  | $ | 65.85
Granted |  | 351,034 |  |  | 74.09
Vested |  | (413,639) |  |  | 65.33
Forfeited |  | (22,705) |  |  | 70.32
Nonvested at June 30, 2018 |  | 526,377 |  | $ | 71.56
Granted |  | 375,580 |  |  | 74.40
Vested |  | (364,410) |  |  | 70.92
Forfeited |  | (16,407) |  |  | 74.13
Nonvested at June 30, 2019 |  | 521,140 |  | $ | 73.97
| (1) |  | Pursuant to the acquisition of AS&E, we assumed unvested RSUs originally granted by AS&E and converted them into RSUs for our Common Stock.

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