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STOCKHOLDERS' EQUITY - Stock-based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
STOCKHOLDERS' EQUITY |  |  |  |
Stock-based compensation expense |  | $ 29,124 | $ 28,072 | $ 26,771
Weighted average assumptions used to determine the fair value calculations for stock options issued |  |  |  |
Expected holding period (in years) |  | 4 years 6 months | 4 years 6 months | 4 years 6 months
Weighted-Average Fair Value |  |  |  |
Granted (in dollars per share) |  | $ 87.90 | $ 90.31 | $ 80.40
RSU |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Unrecognized compensation cost |  | $ 13,900 |  |
Weighted-average period |  | 2 years |  |
Stock Options |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Unrecognized compensation cost |  | $ 700 |  |
Weighted-average period |  | 2 years |  |
OSI Plans |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Shares available for grant |  | 700,000 |  |
Weighted-Average Fair Value |  |  |  |
Additional maximum number of shares of common stock which may be issued | 1,650,000 |  |  |
Increase in maximum number of shares authorized under share based compensation plan | 7,100,000 |  |  |
OSI Plans | RSU |  |  |  |
Shares |  |  |  |
Nonvested at the beginning of the period (in shares) |  | 427,447 | 435,925 | 423,590
Granted (in shares) |  | 357,475 | 334,435 | 339,311
Vested (in shares) |  | (313,862) | (337,442) | (313,892)
Forfeited (in shares) |  | (15,545) | (5,471) | (13,084)
Nonvested at the end of the period (in shares) |  | 455,515 | 427,447 | 435,925
Weighted-Average Fair Value |  |  |  |
Nonvested at the beginning of the period (in dollars per share) |  | $ 90.17 | $ 84.16 | $ 88.68
Granted (in dollars per share) |  | 87.90 | 90.31 | 80.40
Vested (in dollars per share) |  | 96.36 | 82.66 | 86.12
Forfeited (in dollars per share) |  | 88.42 | 83.66 | 85.78
Nonvested at the end of the period (in dollars per share) |  | $ 85.15 | $ 90.17 | $ 84.16
OSI Plans | Restricted stock and RSU |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Number of shares available for grant reduced for each award granted |  | 1.87 |  |
Number of shares available for grant increased for each award forfeited and returned |  | 1.87 |  |
Weighted-Average Fair Value |  |  |  |
Total fair value of shares vested |  | $ 27,900 | $ 27,900 | $ 27,000
OSI Plans | Restricted stock and RSU | Minimum |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Vesting period |  | 3 years |  |
OSI Plans | Restricted stock and RSU | Maximum |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Vesting period |  | 4 years |  |
OSI Plans | Stock Options |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Vesting period |  | 3 years |  |
Number of Options |  |  |  |
Outstanding at the beginning of the period (in shares) |  | 110,645 | 255,220 | 326,304
Granted (in shares) |  | 23,351 | 22,954 | 22,171
Exercised (in shares) |  | (47,354) | (166,629) | (88,657)
Expired or forfeited (in shares) |  | (2,965) | (900) | (4,598)
Outstanding at the end of the period (in shares) |  | 83,677 | 110,645 | 255,220
Exercisable at the end of the period (in shares) |  | 38,977 |  |
Weighted average assumptions used to determine the fair value calculations for stock options issued |  |  |  |
Risk-free interest rate (as percent) |  | 3.90% | 1.20% | 0.40%
Expected volatility (as percent) |  | 31.00% | 31.00% | 26.00%
Weighted Average Exercise Price |  |  |  |
Outstanding at the beginning of the period (in dollars per share) |  | $ 82.43 | $ 50.24 | $ 44.41
Granted (in dollars per share) |  | 87.90 | 96.38 | 82.17
Exercised (in dollars per share) |  | 77.42 | 35.09 | 35.19
Expired or forfeited (in dollars per share) |  | 74.06 | 73.99 | 80.46
Outstanding at the end of the period (in dollars per share) |  | 87.09 | 82.43 | 50.24
Exercisable at the end of the period (in dollars per share) |  | $ 83.79 |  |
Weighted-Average Remaining Contractual Term |  |  |  |
Outstanding at the end of the period |  | 7 years 1 month 6 days |  |
Exercisable at the end of the period |  | 5 years 1 month 6 days |  |
Aggregate Intrinsic Value |  |  |  |
Outstanding at the end of the period |  | $ 2,572 |  |
Exercisable at the end of the period |  | $ 1,327 |  |
Stock-based compensation, other disclosures |  |  |  |
Weighted-average grant-date fair value of stock options (in dollars per share) |  | $ 28.46 | $ 26.72 | $ 18.37
Total intrinsic value of options exercised |  | $ 1,500 |  |
OSI Plans | Performance-based restricted stock units |  |  |  |
Shares |  |  |  |
Granted (in shares) |  | 110,811 | 96,620 | 136,242
OSI Plans | Performance-based restricted stock units | Minimum |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the company's common stock |  | 0.00% |  |
OSI Plans | Performance-based restricted stock units | Maximum |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the company's common stock |  | 376.00% |  |
OSI Plans | Incentive stock options | Minimum |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Percentage of voting power owned |  | 10.00% |  |
Purchase price expressed as a percentage of the fair market value of the Company's common stock on the date of grant |  | 110.00% |  |
OSI Plans | Nonqualified options | Minimum |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Percentage of voting power owned |  | 10.00% |  |
Purchase price expressed as a percentage of the fair market value of the Company's common stock on the date of grant |  | 110.00% |  |
Employee Stock Purchase Plan |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Shares available for grant |  | 416,762 |  |
Employee Stock Purchase Plan | Maximum |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Discount rate for eligible employees to purchase common stock (as a percent) |  | 15.00% |  |
Cost of goods sold |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Stock-based compensation expense |  | $ 911 | $ 812 | $ 760
Selling, general and administrative |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Stock-based compensation expense |  | 27,716 | 26,749 | 25,457
Research and development |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Stock-based compensation expense |  | $ 497 | $ 511 | $ 554

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