INCOME AND OTHER TAXES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
U.S. federal statutory tax rate	21.00%	21.00%
Income taxes receivable			$ 10,764,000
Proceeds from income tax refunds	$ 4,261,000	$ 10,841,000
Increase in valuation allowance	8,062,000	14,694,000
Research and development credit carryforward	2,791,000	2,205,000
Uncertain tax positions that would affect the effective tax rate	0
ERC benefit		$ 4,106,000
Interest income on income tax refund, amount	155,000
Federal
Income Tax Contingency [Line Items]
Net operating losses	251,290,000
State
Income Tax Contingency [Line Items]
Net operating losses	209,282,000
Foreign Tax Authority
Income Tax Contingency [Line Items]
Net operating losses	$ 10,687,000