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STOCKHOLDERS' EQUITY - Reserved Shares of Common Stock for Issuance (Details) - shares | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
--- | --- | --- | ---
Stock-based compensation activity |  |  |
Stock options outstanding | 3,954,716 |  |
Restricted stock units outstanding | 179,155 |  |
Total reserved shares of common stock for issuance | 6,813,009 |  |
2017 Employee Stock Purchase Plan (ESPP) |  |  |
Stock-based compensation activity |  |  |
Stock available for future grants or issuance | 589,695 |  |
2005 Stock Incentive Plan |  |  |
Stock-based compensation activity |  |  |
Stock options outstanding | 3,477,199 | 3,714,494 | 4,059,282
Stock available for future grants or issuance | 2,089,443 |  |

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