RESTRUCTURING CHARGES - Schedule of Accrued Restructuring Costs (Details) - Employee compensation costs - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Accrued restructuring and severance costs rollforward
Balance at beginning of period		$ 0
Restructuring accrual assumed in Spectrum Merger (See Note 2)		7,508
Net accrual additions	$ 2,257
Cash paid	(5,345)
Balance at end of period	$ 4,420	$ 4,420