Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION - Non-vested Stock Options (Details)

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SHARE-BASED COMPENSATION - Non-vested Stock Options (Details) - Stock Options
 12 Months Ended
Dec. 31, 2021
$ / shares
shares
Non-vested Options Outstanding  
At the beginning | shares 427,035
Options granted | shares 1,096,723
Options forfeited/cancelled | shares (64,042)
Options exercised | shares (10,844)
Options vested | shares (390,637)
At the end | shares 1,058,235
Weighted-Average Grant Date Fair Value  
At the beginning (in dollars per share) | $ / shares $ 1.21
Options granted (in dollars per share) | $ / shares 0.84
Options forfeited/cancelled (in dollars per share) | $ / shares 1.88
Options exercised (in dollars per share) | $ / shares 1.35
Options vested (in dollars per share) | $ / shares 0.96
At the end (in dollars per share) | $ / shares $ 0.95