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EARNINGS PER SHARE - Narrative (Details) - shares	12 Months Ended
EARNINGS PER SHARE - Narrative (Details) - shares	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Convertible Note
Antidilutive Securities Excluded from Computation of Earnings Per Share
Maximum issuable upon conversion (in shares)	36,214,960
Conversion rate	23.36449%
Stock option
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially anti-dilutive shares (shares)	4,195,168	5,104,288	4,418,250
Stock option \| Series B Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially anti-dilutive shares (shares)	0	4,102,690	3,826,055
Stock option \| Series B1 Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially anti-dilutive shares (shares)	0	7,399,649	9,028,085
Stock option \| Series A Preferred
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially anti-dilutive shares (shares)	385,601	419,859	419,859
Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share
Potentially anti-dilutive shares (shares)	0	4,600,921	8,633,188