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Equity Incentive Plan (Tables) | 3 Months Ended
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Sep. 30, 2021
Equity Incentive Plan |
Stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | ​ | ​ |  | Weighted
​ | ​ | ​ | ​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Weighted | ​ | Remaining
​ | ​ | Number of | ​ | Average | ​ | Contractual
​ | ​ | Options | ​ | Exercise Price | ​ | Life in Years
Outstanding June 30, 2021 |  | 109,588 | ​ | $ | 14.52 |  | 8.07
Forfeited/Cancelled |  | (6,077) | ​ | ​ | 6.33 |  |
Expired |  | (7,645) | ​ | ​ | 8.53 |  |
Outstanding at September 30, 2021 |  | 95,866 | ​ | $ | 15.52 |  | 8.40
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at September 30, 2021 |  | 47,953 | ​ | $ | 22.73 |  | 8.28
Restricted stock activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average Grant
​ | ​ | Number of | ​ | Date Fair
​ | ​ | Shares | ​ | Value
Unvested at June 30, 2021 |  | 1,955,268 | ​ | $ | 7.83
Granted |  | 220,000 | ​ | ​ | 4.02
Vested |  | (69,590) | ​ | ​ | 6.93
Unvested at September 30, 2021 |  | 2,105,678 | ​ | $ | 7.46
Restricted stock units activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average Grant
​ | ​ | Number of | ​ | Date Fair
​ | ​ | Shares | ​ | Value
Unvested at June 30, 2021 |  | 78,318 | ​ | $ | 7.20
Forfeited | ​ | (1,156) | ​ | ​ | 6.12
Unvested at September 30, 2021 |  | 77,162 | ​ | $ | 7.21
Stock-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | September 30,
​ | ​ | 2021 |  | 2020
​ | ​ | (In thousands)
Cost of sales | ​ | $ | 9 | ​ | $ | —
Research and development | ​ | ​ | 319 | ​ | ​ | —
Selling and marketing | ​ | ​ | 9 | ​ | ​ | —
General and Administrative | ​ |  | 1,182 | ​ |  | 455
Total stock-based compensation expense | ​ | $ | 1,519 | ​ | $ | 455

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