SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION - Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Cash and Cash Equivalents [Line Items]
Accumulated deficit	$ (399,419)		$ (389,737)
Property and equipment purchases in accounts payable	34	$ 2,557
Common stock issued in exchange for reduction in debt	1,462	0
Shares issued to settle extension fees for stand-by letters of credit	1,489	0
Cash paid for interest	2,874	3,069
Cumulative Effect, Period of Adoption, Adjustment
Cash and Cash Equivalents [Line Items]
Accumulated deficit	$ 0	$ 22