INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	21.00%	21.00%
Income tax receivable, CARES Act	$ 8,056	$ 8,056	$ 3,273
Income tax benefit, recognizing net operating loss deferred tax asset		6,218
Income tax benefit, tax rate differential between carryback period and federal tax rate		1,838
Income taxes receivable		11,440
Receipt of income taxes receivable	676	(8,133)
Increase in valuation allowance	17,203	$ 11,251
Net operating loss carryforwards not subject to expiration	170,443
Net operating loss carryforwards subject to expiration	144,225
Research and development credit carryforward	1,788
Uncertain tax positions that would affect the effective tax rate	$ 0