STOCK-BASED COMPENSATION - Compensation Awards (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Employee Stock Option
Number of outstanding options
Balance at the beginning of the period (in shares)	948,000
Granted (in shares)	828,000
Exercised (in shares)	(2,000)
Released RSUs/RSAs (in shares)	0
Forfeited (in shares)	(275,000)
Balance at the end of the period (in shares)	1,499,000	948,000
Vested and expected to vest at the end of the period (in shares)	1,499,000
Weighted-Average Exercise Price of Outstanding Options
Balance at the beginning of the period (in dollars per share)	$ 15.56
Granted (in dollars per share)	12.77
Exercised (in dollars per share)	12.98
Released RSUs/RSAs (in shares)	0
Forfeited (in dollars per share)	15.22
Balance at the end of the period (in dollars per share)	14.09	$ 15.56
Vested and expected to vest at the end of the period (in dollars per shares)	$ 14.09
Additional disclosures
Aggregate intrinsic value of options outstanding	$ 3.6
Aggregate intrinsic value of options exercisable	$ 0.8
Exercisable option	519,165
Weighted average remaining contractual term of options exercisable	7 years 11 months 15 days	8 years 3 days
Total intrinsic value of options exercised	$ 0.0	$ 0.0	$ 0.0
Total estimated fair value of options vested	$ 1.9	$ 0.0	0.6
RSUs
Number of outstanding RSUs and PSUs/RSAs and PSAs
Balance at the beginning of the period (in shares)	518,000
Granted (in shares)	389,000
Exercised (in shares)	0
Released RSUs and RSAs (in shares)	(284,000)
Forfeited (in shares)	(141,000)
Balance at the end of the period (in shares)	482,000	518,000
Vested and expected to vest at the end of the period (in shares)	482,000
Weighted-Average Fair Value per Share at Grant
Balance at the beginning of the period (in dollars per share)	$ 12.16
Granted (in dollars per share)	12.85
Exercised (in dollars per share)	0
Released RSUs and RSAs (in dollars per share)	12.42
Forfeited (in dollars per share)	11.98
Balance at the end of the period (in dollars per share)	12.62	$ 12.16
Vested and expected to vest at the end of the period (in dollars per share)	$ 12.62
Additional disclosures
Total estimated fair value of equity instruments vested	$ 3.9	$ 2.3	$ 1.1
RSAs
Number of outstanding RSUs and PSUs/RSAs and PSAs
Balance at the beginning of the period (in shares)	30,000
Granted (in shares)	0
Exercised (in shares)	0
Released RSUs and RSAs (in shares)	(14,000)
Forfeited (in shares)	0
Balance at the end of the period (in shares)	16,000	30,000
Vested and expected to vest at the end of the period (in shares)	0
Weighted-Average Fair Value per Share at Grant
Balance at the beginning of the period (in dollars per share)	$ 14.97
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Released RSUs and RSAs (in dollars per share)	15.02
Forfeited (in dollars per share)	0
Balance at the end of the period (in dollars per share)	14.93	$ 14.97
Vested and expected to vest at the end of the period (in dollars per share)	$ 0