INVESTMENTS (Details Textual) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Feb. 28, 2019	May 31, 2018
Schedule of Investments [Line Items]
Long-term Investments	$ 4,455				$ 4,455		$ 4,455	$ 300	$ 5,400
Estimated Fair Value	55,855				55,855		69,537
Unrealized Gain on Securities			$ 200		(300)
Gain (Loss) on Investments	0				0
Cost	52,788				52,788		65,158
Realized Investment Gains (Losses)		$ 8,300		$ 46	(8,371)	$ 8,371
Net change in unrealized appreciation (depreciation) on private investments	(299)	$ 2,800	$ 215		(262)	$ (2,111)
us-gaap_EquitySecuritiesMember [Member]
Schedule of Investments [Line Items]
Cost	$ 147				$ 147		$ 140