Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Product sales as a percentage of total revenue (in percentage)	90.00%	90.00%	90.00%	90.00%
Disaggregation of Revenue
Revenue	$ 12,739	$ 21,879	$ 41,035	$ 99,827
Operating expenses (excluding depreciation and amortization):	29,466	23,622	63,939	105,711
Products
Disaggregation of Revenue
Revenue	12,076	21,031	39,053	96,733
Operating expenses (excluding depreciation and amortization):	29,041	23,542	62,866	105,078
Services
Disaggregation of Revenue
Revenue	663	848	1,982	3,094
Operating expenses (excluding depreciation and amortization):	$ 425	$ 80	$ 1,073	$ 633