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SHARE-BASED PAYMENTS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 18, 2022 | Jan. 25, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2019 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award exercise period |  |  | 5 years |  |  |  |
Exercisable options, weighted average remaining contractual term |  |  | 2 years 2 months 12 days |  |  |  |
Grants in period, weighted average exercise price (in dollars per share) |  |  | $ 6.69 |  | $ 3.99 |  |
Number of options (in shares) |  |  | 819,652 |  | 942,882 |  | 1,609,087
Number of exercisable options (in shares) |  |  | 745,822 |  |  |  |
Outstanding options, weighted average exercise price (in dollars per share) |  |  | $ 2.99 |  | $ 2.79 |  | $ 2.91
Exercisable options, weighted average exercise price (in dollars per share) |  |  | $ 2.79 |  |  |  |
Options, vested and expected to Vest, aggregate intrinsic value |  |  | $ 5,048 |  |  |  |
Share-based compensation |  |  | $ 862 | $ 697 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |  |  | 2 years 4 months 20 days |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |  |  | $ 980 | 770 |  |  |
Subsequent Event |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of grants in period (in shares) | 70,000.00 |  |  |  |  |  |
Stock Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Common stock, shares authorized (in shares) |  |  | 15,718,025 |  |  |  |
Employee Stock Option |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period |  | 100,000 |  |  |  |  |
Award vesting period |  |  | 2 years |  |  |  |
Share-based compensation |  |  | $ 32 | $ 200 |  |  |
Unrecognized compensation costs related to unvested stock options |  |  | $ 120 |  |  |  |
Share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition |  |  | 1 year 6 months 7 days |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period |  | 330,000 |  |  |  |  |
Award vesting period |  |  | 3 years |  |  |  |
Granted, nonvested, number of shares (in shares) |  |  | 330,000 | 440,000 |  |  |
Grants in period, grant date intrinsic value (in dollars per share) |  |  | $ 2,930,000 | $ 2,670,000 |  |  |
Share-based compensation |  |  | $ 484 | $ 362 |  |  |
Unrecognized compensation costs related to RSU awards |  |  | $ 2,310 |  |  |  |
Share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition |  |  | 2 years 1 month 20 days |  |  |  |
Restricted Stock Units (RSUs) | Subsequent Event |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted, nonvested, number of shares (in shares) | 20,000.00 |  |  |  |  |  |
Stock Appreciation Rights (SARs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period |  | 830,000 |  |  |  |  |
Award vesting period |  |  | 5 years |  |  | 5 years |
Number of grants in period (in shares) |  |  |  |  |  | 2,200,000 |
Grants in period, weighted average exercise price (in dollars per share) |  |  |  |  |  | $ 1.25 |
Granted, nonvested, number of shares (in shares) |  |  | 730,686 |  |  |  |
Share-based compensation |  |  | $ 346 | $ 135 |  |  |
Unrecognized compensation costs related to RSU awards |  |  | $ 2,280 |  |  |  |
Share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition |  |  | 1 year 4 months 28 days |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Issued, Number |  |  | 730,000 |  |  |  |
Stock Appreciation Rights (SARs) | Subsequent Event |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 100,000 |  |  |  |  |  |
Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Exercisable options, weighted average remaining contractual term |  |  | 10 years |  |  |  |
Grants in period, weighted average exercise price (in dollars per share) |  |  | $ 10.03 |  | 8.41 |  |
Outstanding options, weighted average exercise price (in dollars per share) |  |  | 10.03 |  | $ 8.41 |  | $ 15.61
Exercisable options, weighted average exercise price (in dollars per share) |  |  | 7.14 |  |  |  |
Share-based Compensation Award, Tranche One | Stock Appreciation Rights (SARs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Grants in period, weighted average exercise price (in dollars per share) |  |  | $ 12.00 |  |  | $ 5.00 |
Period of exercise price |  |  | 90 days |  |  | 90 days |
Share-based Compensation Award, Tranche Two | Stock Appreciation Rights (SARs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Grants in period, weighted average exercise price (in dollars per share) |  |  | $ 14.00 |  |  | $ 7.00 |
Period of exercise price |  |  | 90 days |  |  | 90 days |
Share-based Compensation Award, Tranche Three | Stock Appreciation Rights (SARs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Grants in period, weighted average exercise price (in dollars per share) |  |  | $ 16.00 |  |  | $ 10.00 |
Period of exercise price |  |  | 90 days |  |  | 90 days |
Common Stock | Stock Appreciation Rights (SARs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Grants in period, weighted average exercise price (in dollars per share) |  |  | $ 6.47 |  |  | $ 2.92 |

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