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STOCKHOLDERS' EQUITY - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2024 | Jan. 01, 2023 | Apr. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2021 | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized (in shares) |  |  |  | 200,000,000 |  | 200,000,000 |  |  |  | 200,000,000 |  |  |
Common stock, shares issued (in shares) |  |  |  | 41,487,586 |  | 41,487,586 |  |  |  | 37,829,565 |  |  |
Common stock, shares outstanding (in shares) |  |  |  | 41,487,586 |  | 41,487,586 |  |  |  | 37,829,565 |  |  |
Preferred stock, shares authorized (in shares) |  |  |  | 50,000,000 |  | 50,000,000 |  |  |  | 50,000,000 |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 0 |  | 0 |  |  |  | 0 |  |  |
Weighted average grant date fair value (in dollars per share) |  |  |  |  |  | $ 1.47 | $ 4.93 |  |  |  |  |  |
Unrecognized share-based compensation expense |  |  |  | $ 11,100 |  | $ 11,100 |  |  |  |  |  |  |
Total unrecognized compensation costs, weighted average period for recognition |  |  |  |  |  | 2 years 4 months 24 days |  |  |  |  |  |  |
Total stock-based compensation |  |  |  | 1,915 | $ 2,692 | $ 4,003 | $ 5,737 |  |  |  |  |  |
Restricted Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total unrecognized compensation costs, weighted average period for recognition |  |  |  |  |  | 8 months 12 days |  |  |  |  |  |  |
Unrecognized share-based compensation expense, restricted stock awards |  |  |  | 500 |  | $ 500 |  |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total unrecognized compensation costs, weighted average period for recognition |  |  |  |  |  | 2 years 10 months 24 days |  |  |  |  |  |  |
Unrecognized share-based compensation expense, restricted stock units |  |  |  | $ 900 |  | $ 900 |  |  |  |  |  |  |
2021 Equity Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issuable (in shares) |  |  |  | 8,683,135 |  | 8,683,135 |  | 5,440,344 |  |  |  |  |
Percentage of number of shares of common stock outstanding |  |  |  |  |  |  |  | 5.00% |  |  |  |  |
Additional shares authorized (in shares) | 1,891,478 | 1,891,868 |  |  |  |  |  |  |  |  |  |  |
Shares available for future issuance (in shares) |  |  |  | 3,454,623 |  | 3,454,623 |  |  |  |  |  |  |
2021 Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of number of shares of common stock outstanding |  |  |  |  |  |  |  | 1.00% |  |  |  |  |
Additional shares authorized (in shares) | 0 | 378,373 |  |  |  |  |  |  |  |  |  |  |
Shares available for future issuance (in shares) |  |  |  | 834,589 |  | 834,589 |  |  |  |  |  |  |
Common stock issuable (in shares) |  |  |  |  |  |  |  | 291,324 |  |  |  |  |
Common stock shares outstanding (in shares) |  |  |  | 582,648 |  | 582,648 |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, purchase price of common stock (as a percent) |  |  |  |  |  | 85.00% |  |  |  |  |  |  |
Total stock-based compensation |  |  |  | $ 12 | $ 60 | $ 54 | $ 122 |  |  |  |  |  |
Pre-Funded Warrants | Follow on Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of securities called by warrants or rights (in shares) |  |  |  | 3,333,388 | 3,333,388 | 3,333,388 | 3,333,388 |  |  |  |  |  | 3,333,388
Offering price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 5.9999
Pre-funded warrants exercise price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0001
Exceed limit percentage with exercise to aggregate share of common stock beneficially owned (as a percent) |  |  |  |  |  | 9.99% |  |  |  |  |  |  |
Days of notice |  |  |  |  |  | 61 days |  |  |  |  |  |  |
Percentage of common stock beneficially owned not exceed (as a percent) |  |  |  |  |  | 19.99% |  |  |  |  |  |  |
COMMON |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) |  |  |  | 41,487,586 | 37,790,856 | 41,487,586 | 37,790,856 |  | 37,811,970 | 37,829,565 | 37,746,214 | 37,837,369 |
Shares issued (in shares) |  |  |  | 38,289 | 43,423 | 38,289 | 43,423 |  |  |  |  |  |
COMMON | 2021 Employee Stock Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) |  |  |  |  |  | 38,289 | 43,423 |  |  |  |  |  |
Johnson & Johnson | Securities Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, number of shares issued in transaction (in shares) |  |  | 3,636,363 |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) |  |  | $ 1.82 |  |  |  |  |  |  |  |  |  |
Sale of stock, premium on stock price (as a percent) |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Gross proceeds |  |  | $ 6,600 |  |  |  |  |  |  |  |  |  |

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