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Stockholders' Equity (Tables) | 3 Months Ended
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Sep. 30, 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 September 30,
​ |  | 2019 |  | 2020
Cost of goods sold | ​ | $ | 171 | ​ | $ | 179
Selling, general and administrative | ​ |  | 6,085 | ​ |  | 5,785
Research and development | ​ |  | 160 | ​ |  | 145
Stock-based compensation expense | ​ | $ | 6,416 | ​ | $ | 6,109
​
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 |  | 526 | ​ | ​ | 75.96 | ​ | ​ | ​ | ​ | ​
Exercised |  | (69,195) | ​ | ​ | 27.42 | ​ | ​ | ​ | ​ | ​
Expired or forfeited |  | (1,009) | ​ | ​ | 85.87 | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2020 |  | 256,626 | ​ | ​ | 48.89 | ​ | 2.8 years | ​ | $ | 7,814
Exercisable at September 30, 2020 | ​ | 228,022 | ​ | ​ | 43.97 |  | 2.0 years | ​ | ​ | 7,756
​
Summary of RSU award activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | Average
​ |  | Shares |  | Fair Value
Nonvested at June 30, 2020 |  | 423,590 | ​ | $ | 88.68
Granted |  | 303,071 | ​ | ​ | 80.13
Vested |  | (286,701) | ​ | ​ | 86.38
Forfeited |  | (2,270) | ​ | ​ | 86.09
Nonvested at September 30, 2020 |  | 437,690 | ​ | $ | 84.28
​

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