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STOCK-BASED COMPENSATION PLAN - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Aggregate intrinsic value of options exercised |  | $ 6,244 | $ 48
Unamortized stock-based compensation costs |  | $ 16,949 |
Weighted average period of recognition for unamortized stock-based compensation costs |  | 2 years 1 month 24 days |
Percentage of potential increase of shares authorized |  | 5.00% |
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 3,392,153 |
Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average estimated fair value of options granted using Black-Scholes options pricing model (in USD per share) |  | $ 5.63 | $ 0.65
2014 Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares authorized for issuance (in shares) |  | 15,482,675 |
2014 Equity Incentive Plan | Stock Appreciation Rights (SARs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 0 | 0
2014 Equity Incentive Plan | Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 0 | 0
2014 Equity Incentive Plan | Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 0 | 0
2014 Equity Incentive Plan | Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Accelerated vesting of shares (in shares) |  | 0 | 0
Share expiration period |  | 10 years |
Award vesting period |  | 4 years |
2021 Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares authorized for issuance (in shares) |  | 12,210,000 |
Shares available for future grant (in shares) |  | 9,785,574 |
Potential increase of shares authorized (in shares) |  | 15,260,000 |
2021 Equity Incentive Plan | Subsequent Event |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Increase in shares authorized for issuance (in shares) | 5,400,000 |  |
2021 Equity Incentive Plan | Stock Appreciation Rights (SARs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 0 |
2021 Equity Incentive Plan | Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 0 |
2021 Equity Incentive Plan | Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share expiration period |  | 10 years |
Award vesting period |  | 4 years |
2021 Equity Incentive Plan | Non-qualified Stock Options (NSOs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 0 |
2021 Equity Incentive Plan | Incentive Stock Options (ISOs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) |  | 0 |

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