PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 174,606	$ 145,148
Less: Accumulated depreciation	(72,493)	(57,276)
Property and equipment, net	102,113	87,872
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,642	2,642
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	53,568	47,994
Office and lab equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	85,881	74,726
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,921	7,592
Construction-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 23,594	$ 12,194

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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