SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 25	$ 24	$ 8
Additions Charged to Cost and Expenses	34	1	16
Deductions	0	0	0
Balance at End of Year	59	25	24
Deferred tax asset valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	46,015	39,320	38,839
Additions Charged to Cost and Expenses	0	6,695	481
Deductions	(9,111)	0	0
Balance at End of Year	$ 36,904	$ 46,015	$ 39,320