INCOME TAXES - Deferred tax assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss and capital loss carryforwards and credits	$ 34,595	$ 47,386
Unrealized gain on investments held at fair value	146	35
Compensation expense for share-based awards	1,095	607
Accrued liabilities and other	1,453	1,551
Lease liability	689	784
State taxes	37	94
Total deferred tax assets	38,015	50,457
Valuation allowance	(30,219)	(48,250)
Total deferred tax assets, net of valuation allowance	7,796	2,207
Deferred tax liabilities:
ROU Asset	(680)	(782)
Fixed assets and intangibles	(1,841)	(2,166)
Basis of investment in affiliates	(2,360)	0
Other	0	0
Total deferred tax liabilities	(4,881)	(2,948)
Net deferred tax assets (liabilities)	$ 2,915
Net deferred tax assets (liabilities)		$ (742)