Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 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
Total revenues	$ 10,179	$ 12,739	$ 31,114	$ 41,035
Revenue from related party	1,332	0	1,332	0
Products
Disaggregation of Revenue
Total revenues	9,494	12,076	29,017	39,053
Services
Disaggregation of Revenue
Total revenues	$ 685	$ 663	$ 2,097	$ 1,982

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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