Quarterly report pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - Activity of Stock Options (Details)

v3.21.2
SHARE-BASED COMPENSATION - Activity of Stock Options (Details)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Stock Options    
Outstanding, beginning balance (in shares) | shares 896,888  
Granted (in shares) | shares 60,079  
Exercised (in shares) | shares (40,942)  
Forfeited (in shares) | shares (27,857)  
Expired (in shares) | shares (85,399)  
Outstanding, ending balance (in shares) | shares 802,769 896,888
Vested and expected to vest (in shares) | shares 791,488  
Vested and exercisable (in shares) | shares 413,241  
Weighted-Average Exercise Price    
Outstanding, beginning (USD per share) | $ / shares $ 5.22  
Granted (USD per share) | $ / shares 13.92  
Exercised (USD per share) | $ / shares 0.24  
Forfeited (USD per share) | $ / shares 12.11  
Expired (USD per share) | $ / shares 8.40  
Outstanding, ending (USD per share) | $ / shares 5.96 $ 5.22
Vested and expected to vest (USD per share) | $ / shares 5.90  
Vested and exercisable (USD per share) | $ / shares $ 6.23  
Weighted-Average Remaining Contractual Term (Years) and Aggregate Intrinsic Value    
Outstanding term 3 years 11 months 19 days 3 years 11 months 15 days
Granted term 9 years 8 months 12 days  
Vested and expected to vest term 4 years 1 month 2 days  
Vested and exercisable term 3 years 9 months 7 days  
Outstanding | $ $ 3,361 $ 2,889
Exercised | $ 434  
Vested and expected to vest | $ 3,364  
Vested and exercisable | $ $ 1,702