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STOCK-BASED COMPENSATION - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total compensation cost related to unvested stock options and RSU | $ 31,600,000 |  |
Weighted-average period of unvested stock options and RSU | 2 years 7 months 2 days |  |
Capitalized stock-based employee compensation expense | $ 0 | $ 0 | $ 0
Weighted-average estimated fair value per share of options granted (in dollars per share) | $ 7.34 | $ 5.25 | $ 6.37
Issuance of common stock under employee stock purchase plan (in shares) | 433,107 | 274,382 | 249,364
Stock issued under employee stock purchase plans, average exercise price (in dollars per share) | $ 7.78 | $ 7.34 | $ 8.53
Weighted-average estimated fair value of shares purchased under ESPP plan (in dollars per share) | $ 4.48 | $ 8.02 | $ 4.70
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total compensation cost related to unvested stock options and RSU | $ 21,800,000 |  |
Weighted-average period of unvested stock options and RSU | 1 year 9 months 3 days |  |

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