INCOME TAXES - Income Tax Reconciliation (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
US federal statutory tax rate	21.00%	21.00%	21.00%
State and local income taxes net of federal tax benefit	4.90%	(29.50%)	(0.50%)
Valuation allowance	(46.20%)	(29.90%)	(13.40%)
Stock-based compensation	(0.10%)	6.70%	0.00%
Non-deductible compensation	0.10%	(16.30%)	(0.70%)
Non-deductible expenses	0.30%	(8.20%)	(2.80%)
Other, net	(0.10%)	2.20%	(0.70%)
Effective income tax rate	(20.10%)	(54.00%)	2.90%