SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Change in Tax Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves balance, beginning of year	$ 18,562	$ 12,120
Charged to Costs and Expenses	(20)	(19)
Charged other Accounts	10,909	6,461
Deductions	0	0
Valuation allowances and reserves balance, end of year	29,451	18,562
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves balance, beginning of year	2,208	2,636
Charged to Costs and Expenses	341	208
Charged other Accounts	0	0
Deductions	150	636
Valuation allowances and reserves balance, end of year	2,399	2,208
Reserve for Inventory Obsolescence
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves balance, beginning of year	2,210	2,667
Charged to Costs and Expenses	11,309	2,297
Charged other Accounts	0	0
Deductions	1,517	2,754
Valuation allowances and reserves balance, end of year	$ 12,002	$ 2,210