STOCK-BASED COMPENSATION - Schedule of Stock Option and RSU Activity (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Number of Shares Available for Issuance Under the Plan
Beginning balance (in shares)			1,815,000
Granted (in shares)			(1,923,000)
Options exercised and RSUs vested (in shares)			71,000
Forfeited or expired (in shares)			4,642,000
Ending balance (in shares)	4,605,000		4,605,000
Stock Options, Number of Shares
Beginning balance (in shares)			4,632,000
Granted (in shares)			0
Options exercised (in shares)	0	0	0	0
Forfeited or expired (in shares)			(4,599,000)
Ending balance (in shares)	33,000		33,000
Stock Options, Weighted-Average Exercise Price
Beginning balance (in dollars per share)			$ 7.13
Granted (in dollars per share)			0
Options exercised (in dollars per share)			0
Forfeited or expired (in dollars per share)			7.17
Ending balance (in dollars per share)	$ 5.30		$ 5.30
Restricted Stock Units
Restricted Stock Units, Number of Shares
Beginning balance (in shares)			759,000
Granted (in shares)			1,923,000
RSUs vested (in shares)			(209,000)
Forfeited or expired (in shares)			(43,000)
Ending balance (in shares)	2,430,000		2,430,000
Restricted Stock Units, Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)			$ 7.14
Granted (in dollars per share)			1.06
RSUs vested (in dollars per share)			8.75
Forfeited or expired (in dollars per share)			11.91
Ending balance (in dollars per share)	$ 2.46		$ 2.46