INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Expense (Benefit)	$ 2,522	$ 1,764	$ 3,899
Unrecognized tax benefits, excluding interest and penalties	16,569	15,937	15,109	$ 14,743
Unrecognized tax benefits that would impact effective tax rate	2,100
Unrecognized tax benefits, interest accrued	600	700
Deferred Tax Assets, Valuation Allowance	67,946	64,152
Income (Loss) from Continuing Operations before Income Taxes, Domestic	4,800	3,200	(1,200)
Income (Loss) from Continuing Operations before Income Taxes, Foreign	1,800	1,700	$ 1,700
California R&D Tax Credits
Deferred Tax Assets, Valuation Allowance	67,900	$ 64,200
U.S.
Tax Credit Carryforward, Amount	24,700
U.S. | IRS
Operating Loss Carryforwards, Total	4,500
State and Local
Tax Credit Carryforward, Amount	25,500
State and Local | IRS
Operating Loss Carryforwards, Total	$ 13,000