PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 75,426		$ 75,426		$ 73,290
Less accumulated depreciation	(41,699)		(41,699)		(37,748)
Total property and equipment, net	33,727		33,727		35,542
Depreciation and amortization	1,700	$ 1,700	5,200	$ 4,300
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,468		2,468		2,590
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,209		12,209		12,737
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	42,298		42,298		40,411
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,236		2,236		2,047
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,362		5,362		4,773
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10,765		10,765		10,728
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	88		$ 88		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	15,000		$ 15,000		13,600
Less accumulated depreciation	$ (5,500)		$ (5,500)		$ (4,700)