Property and Equipment (Schedule of Depreciation Expense Associated Income Statement Line Items) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Depreciation expense	$ 994	$ 1,495	$ 2,446	$ 2,921
Cost of product sales [Member]
Depreciation expense	374	691	1,083	1,333
Cost of services [Member]
Depreciation expense	270	325	560	631
Selling, general and administrative expenses [Member]
Depreciation expense	$ 350	$ 479	$ 803	$ 957