Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
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	$ 9,165	$ 8,880	$ 20,935	$ 28,296
Products
Disaggregation of Revenue
Revenue	8,444	8,176	19,524	26,976
Services
Disaggregation of Revenue
Revenue	$ 721	$ 704	$ 1,411	$ 1,320