INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Accounts receivable, principally due to allowance for doubtful accounts	$ 70	$ 33
Allowance for inventory obsolescence and amortization	203	210
Accrued liabilities not currently deductible	1,133	1,151
Stock-based compensation	1,352	7,943
Accrued compensation	2,457	915
Lease liabilities	2,906	3,349
Goodwill	30,947	34,009
Capitalized research and development costs	2,992	362
Net operating loss carryforwards - federal	8,402	6,034
Net operating loss carryforwards - state	1,522	1,155
R&D tax credit	3,647	3,760
Amortization and depreciation	252	0
Total gross deferred tax assets	55,883	58,921
Less valuation allowance	(54,999)	(57,559)
Total deferred tax assets, net of valuation allowance	884	1,362
Deferred tax liabilities:
Right-of-use assets	(1,697)	(2,034)
Amortization and depreciation	0	(86)
Total deferred tax liabilities	(1,697)	(2,120)
Net deferred tax liabilities	$ (813)	$ (758)