Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION (Schedule of Granted Stock Options to Acquire Common Stock) (Details)

v3.22.1
SHARE-BASED COMPENSATION (Schedule of Granted Stock Options to Acquire Common Stock) (Details)
12 Months Ended
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2020
shares
$ / shares
Dec. 31, 2019
shares
$ / shares
Stock Options      
Balance, January 1 | shares 2,923,770 1,714,421 925,782
Granted | shares 3,725,845 2,076,785 879,412
Forfeited | shares (1,237,635) (867,436) (90,773)
Expired | shares (135,323)
Exercised | shares (19,568)
Balance, December 31 | shares 5,257,089 2,923,770 1,714,421
Exercisable, December 31 | shares 1,214,023 584,585 663,853
Weighted Average Exercise Price      
Balance, January 1 | $ / shares $ 1.76 $ 3.60 $ 12.70
Granted | $ / shares 1.87 0.95 2.75
Forfeited | $ / shares 2.11 3.10 15.04
Expired | $ / shares 2.83
Exercised | $ / shares 0.73
Balance, December 31 | $ / shares 1.73 1.76 3.60
Exercisable, December 31 | $ / shares $ 2.44 $ 3.49 $ 4.67