STOCK BASED COMPENSATION - RSUs (Details) - USD ($)
$ / shares in Units, $ in Thousands |
12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Stock-based compensation |
|
|
| Stock-based compensation expense |
$ 11,177
|
$ 8,026
|
| Restricted Stock Units (RSUs) |
|
|
| Stock-based compensation |
|
|
| Stock-based compensation expense |
1,900
|
$ 1,000
|
| Unamortized stock-based compensation costs for unvested awards |
$ 7,200
|
|
| Summary of restricted stock units outstanding |
|
|
| Outstanding at beginning of period ( in shares) |
206,529
|
|
| Awarded (in shares) |
348,536
|
|
| Released (in shares) |
(52,562)
|
|
| Forfeited (in shares) |
(33,018)
|
|
| Outstanding at end of period ( in shares) |
469,485
|
206,529
|
| Nonvested at end of period (in shares) |
469,485
|
|
| Weighted-Average Grant Date Fair Value |
|
|
| Outstanding at beginning of period (in dollars per share) |
$ 36.08
|
|
| Awarded (in dollars per share) |
11.03
|
|
| Released (in dollars per share) |
33.52
|
|
| Forfeited (in dollars per share) |
32.07
|
|
| Outstanding at end of period (in dollars per share) |
$ 18.05
|
$ 36.08
|
| Aggregate Intrinsic Value |
|
|
| Outstanding at end of period (in dollars) |
$ 4,202
|
$ 4,546
|
| Nonvested at end of period (in dollars) |
$ 4,202
|
|
| Unrecognized stock-based compensation balance for unvested options expected to be recognized (in years) |
3 years 4 months 24 days
|
|