Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Product sales as a percentage of total revenue (in percentage)	90.00%	90.00%
Disaggregation of Revenue
Revenue	$ 11,770	$ 19,416
Products
Disaggregation of Revenue
Revenue	11,082	18,800
Services
Disaggregation of Revenue
Revenue	$ 688	$ 616

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details