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Stockholders' Equity (Tables) | 6 Months Ended
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Dec. 31, 2020
Stockholders' Equity |
Schedule of stock-based compensation expense in the consolidated statements of operations | ​ We recorded stock-based compensation expense in the consolidated statements of operations as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended December 31, |  | Six Months Ended December 31,
​ | ​ | 2019 |  | 2020 |  | 2019 |  | 2020
Cost of goods sold | ​ | $ | 156 | ​ | $ | 194 | ​ | $ | 328 | ​ | $ | 373
Selling, general and administrative | ​ |  | 5,548 | ​ | ​ | 5,384 | ​ |  | 11,633 | ​ |  | 11,168
Research and development | ​ |  | 140 | ​ | ​ | 135 | ​ |  | 299 | ​ |  | 280
Stock-based compensation expense | ​ | $ | 5,844 | ​ | $ | 5,713 | ​ | $ | 12,260 | ​ | $ | 11,821
​
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, 2020 |  | 326,304 |  | $ | 44.41 |  | ​ | ​ | ​ | ​
Granted |  | 22,171 | ​ | ​ | 82.17 | ​ | ​ | ​ | ​ | ​
Exercised |  | (77,532) | ​ | ​ | 30.70 | ​ | ​ | ​ | ​ | ​
Expired or forfeited |  | (2,710) | ​ | ​ | 78.71 | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2020 |  | 268,233 | ​ | ​ | 51.14 | ​ | 3.1 years | ​ | $ | 11,392
Exercisable at December 31, 2020 | ​ | 227,849 | ​ | ​ | 44.77 |  | 2.0 years | ​ | ​ | 11,039
​
Summary of RSU award activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | Average
​ |  | Shares |  | Fair Value
Nonvested at June 30, 2020 |  | 423,590 | ​ | $ | 88.68
Granted |  | 337,778 | ​ | ​ | 80.32
Vested |  | (304,420) | ​ | ​ | 85.95
Forfeited |  | (7,150) | ​ | ​ | 85.08
Nonvested at December 31, 2020 |  | 449,798 | ​ | $ | 84.31
​

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