Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 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	$ 8,880	$ 34,692	$ 28,296	$ 77,949
Operating expenses (excluding depreciation and amortization):	11,632	38,121	34,473	82,089
Products
Disaggregation of Revenue
Revenue	8,176	33,632	26,976	75,703
Operating expenses (excluding depreciation and amortization):	11,278	37,613	33,825	81,062
Services
Disaggregation of Revenue
Revenue	704	1,060	1,320	2,246
Operating expenses (excluding depreciation and amortization):	$ 354	$ 508	$ 648	$ 1,027