PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 74,378		$ 74,378		$ 73,290
Less accumulated depreciation	(40,082)		(40,082)		(37,748)
Total property and equipment, net	34,296		34,296		35,542
Depreciation and amortization	1,600	$ 1,700	3,500	$ 2,700
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,520		2,520		2,590
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,439		12,439		12,737
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	41,407		41,407		40,411
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,120		2,120		2,047
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,102		5,102		4,773
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10,729		10,729		10,728
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	61		$ 61		4
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life			5 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life			7 years
Leased equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,900		$ 14,900		13,600
Less accumulated depreciation	$ (5,100)		$ (5,100)		$ (4,700)