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STOCK-BASED COMPENSATION - Narrative (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options granted, weighted-average grant date fair value (in dollars per share) | $ / shares | $ 5.82 | $ 18.84 | $ 3.79
Options exercised, intrinsic value | $ 12,700 | $ 56,100 | $ 1,100
Remaining unrecognized stock-based compensation expense | 18,300 |  |
Total stock-based compensation expense | 28,661 | 13,546 | 4,542
Research and development |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation expense | 4,634 | $ 2,367 | $ 1,211
Research and development | Internally developed software |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation expense | $ 3,000 |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise price as a percentage of fair value | 100.00% |  |
Exercise price as a percentage of fair value for shareholders owning specified minimum amount | 110.00% |  |
Significant shareholder threshold used for determining exercise price | 10.00% |  |
Exercise period | 10 years |  |
Weighted average period for recognition of stock-based compensation expense | 1 year 8 months 12 days |  |
Stock Options | Share-based Payment Arrangement, Tranche One |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage | 25.00% |  |
Vesting period | 1 year |  |
Stock Options | Share-based Payment Arrangement, Tranche Two |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage | 2.08% |  |
Vesting period | 3 years |  |
RSU |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Right to receive, conversion ratio | 1 |  |
Remaining unrecognized stock-based compensation expense | $ 76,100 |  |
Weighted average period for recognition of stock-based compensation expense | 2 years 3 months 18 days |  |
RSU | 2009 Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage | 25.00% |  |
Vesting period | 4 years |  |
RSU | 2021 Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentage |  | 20.00% |

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