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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Jun. 30, 2023
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): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2022 |  | 2023
Cost of goods sold | ​ | $ | 760 | ​ | $ | 812 | ​ | $ | 911
Selling, general and administrative | ​ |  | 25,457 | ​ |  | 26,749 | ​ |  | 27,716
Research and development | ​ |  | 554 | ​ |  | 511 | ​ |  | 497
Stock-based compensation expense | ​ | $ | 26,771 | ​ | $ | 28,072 | ​ | $ | 29,124
Schedule of weighted average assumptions used to determine the fair value calculations for stock options issued | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2022 |  | 2023 |
Expected dividend |  | — | ​ | — | ​ | — | ​
Risk-free interest rate |  | 0.4 | % | 1.2 | % | 3.9 | %
Expected volatility |  | 26.0 | % | 31.0 | % | 31.0 | %
Expected holding period (in years) |  | 4.5 | ​ | 4.5 | ​ | 4.5 | ​
Schedule of stock option activity | The following summarizes stock option activity for fiscal years 2021, 2022 and 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | 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 |  | (88,657) |  | ​ | 35.19 | ​ | ​ | ​ | ​ | ​
Expired or forfeited |  | (4,598) |  | ​ | 80.46 | ​ | ​ | ​ | ​ | ​
Outstanding at June 30, 2021 |  | 255,220 |  | $ | 50.24 | ​ | ​ | ​ | ​ | ​
Granted |  | 22,954 |  | ​ | 96.38 | ​ | ​ | ​ | ​ | ​
Exercised |  | (166,629) |  | ​ | 35.09 | ​ | ​ | ​ | ​ | ​
Expired or forfeited |  | (900) |  | ​ | 73.99 | ​ | ​ | ​ | ​ | ​
Outstanding at June 30, 2022 |  | 110,645 |  | $ | 82.43 |  | ​ | ​ | ​ | ​
Granted |  | 23,351 | ​ | ​ | 87.90 | ​ | ​ | ​ | ​ | ​
Exercised |  | (47,354) | ​ | ​ | 77.42 | ​ | ​ | ​ | ​ | ​
Expired or forfeited |  | (2,965) | ​ | ​ | 74.06 | ​ | ​ | ​ | ​ | ​
Outstanding at June 30, 2023 |  | 83,677 | ​ | $ | 87.09 | ​ | 7.1 years | ​ | $ | 2,572
Exercisable at June 30, 2023 | ​ | 38,977 | ​ | $ | 83.79 |  | 5.1 years | ​ | $ | 1,327
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | Average
​ |  | Shares |  | Fair Value
Nonvested at June 30, 2020 |  | 423,590 | ​ | $ | 88.68
Granted |  | 339,311 | ​ |  | 80.40
Vested |  | (313,892) | ​ |  | 86.12
Forfeited |  | (13,084) | ​ |  | 85.78
Nonvested at June 30, 2021 |  | 435,925 | ​ | $ | 84.16
Granted |  | 334,435 | ​ |  | 90.31
Vested |  | (337,442) | ​ |  | 82.66
Forfeited |  | (5,471) | ​ |  | 83.66
Nonvested at June 30, 2022 |  | 427,447 | ​ | $ | 90.17
Granted |  | 357,475 | ​ | ​ | 87.90
Vested |  | (313,862) | ​ | ​ | 96.36
Forfeited |  | (15,545) | ​ | ​ | 88.42
Nonvested at June 30, 2023 |  | 455,515 | ​ | $ | 85.15

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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