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10. SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2022
Disclosure Of Compensation Related Costs Sharebased Payments Abstract |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The following table summarizes the weighted-average valuation assumptions and weighted-average grant date fair value of options granted during the periods shown below:
|  | Year Ended December 31, |
Assumptions (weighted-average) |  | 2022 |  |  | 2021 |  |  | 2020 |
Volatility |  |  | — |  |  |  | 120 | % |  |  | 111 | %
Expected term (in years) |  |  | — |  |  |  | 4.0 |  |  |  | 4.0 |
Risk-free rate |  |  | — |  |  |  | 0.9 | % |  |  | 0.3 | %
Expected dividends |  |  | — |  |  |  | 0.0 | % |  |  | 0.0 | %
Pre-vest forfeiture rate |  |  | — |  |  |  | 8.5 | % |  |  | 8.5 | %
Grant date fair value of options granted |  | $ | — |  |  | $ | 11.72 |  |  | $ | 1.20 |
Schedule of Valuation Assumptions for Stock Options | The following table summarizes activity and positions with respect to options for the periods shown below (in thousands):
|  |  |  |  |  |  |  | Weighted-average |  |  |  |
|  |  |  |  |  |  |  | remaining |  |  | Aggregate |
|  |  |  |  | Weighted-average |  |  | contractual |  |  | intrinsic |
Options |  | Shares |  |  | exercise price |  |  | term (in years) |  |  | value |
Outstanding as of December 31, 2019 |  |  | 5,104 |  |  |  | 1.66 |  |  |  | 7.4 |  |  | $ | 122 |
Granted |  |  | 68 |  |  |  | 1.60 |  |  |  |  |  |  |  |  |
Exercised |  |  | (693 | ) |  |  | 1.44 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (1,198 | ) |  |  | 2.20 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2020 |  |  | 3,281 |  |  |  | 1.51 |  |  |  | 6.6 |  |  | $ | 12,784 |
Granted |  |  | 8 |  |  |  | 14.04 |  |  |  |  |  |  |  |  |
Exercised |  |  | (1,519 | ) |  |  | 1.75 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (237 | ) |  |  | 1.23 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2021 |  |  | 1,533 |  |  |  | 1.37 |  |  |  | 5.6 |  |  | $ | 5,645 |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (525 | ) |  |  | 1.38 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (63 | ) |  |  | 3.00 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2022 |  |  | 945 |  |  | $ | 1.26 |  |  |  | 5.7 |  |  | $ | 1,137 |
Vested and expected to vest as of December 31, 2022 |  |  | 945 |  |  | $ | 1.26 |  |  |  | 5.7 |  |  | $ | 1,136 |
Exercisable as of December 31, 2022 |  |  | 941 |  |  | $ | 1.26 |  |  |  | 5.7 |  |  | $ | 1,129 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] | The following table summarizes activity and positions with respect to RSUs and PSUs for the three years ended December 31, 2022 (in thousands):
|  |  |  |  | Weighted-average |
|  | Shares |  |  | price |
Unvested as of December 31, 2019 |  |  | 1,215 |  |  |  | 0.40 |
Granted |  |  | 1,462 |  |  |  | 1.08 |
Vested |  |  | (219 | ) |  |  | 0.88 |
Forfeited |  |  | (475 | ) |  |  | 0.77 |
Unvested as of December 31, 2020 |  |  | 1,983 |  |  |  | 0.76 |
Granted |  |  | 4,179 |  |  |  | 12.92 |
Vested |  |  | (2,380 | ) |  |  | 3.11 |
Forfeited |  |  | (1,157 | ) |  |  | 11.97 |
Unvested as of December 31, 2021 |  |  | 2,625 |  |  |  | 13.05 |
Granted |  |  | 9,180 |  |  |  | 2.46 |
Vested |  |  | (1,391 | ) |  |  | 9.16 |
Forfeited |  |  | (1,548 | ) |  |  | 6.42 |
Unvested as of December 31, 2022 |  |  | 8,866 |  |  | $ | 3.85 |

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