Basis of Presentation and Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Revenue from External Customer [Line Items]
Net sales	$ 2,061	$ 2,637
Commercial
Revenue from External Customer [Line Items]
Net sales	1,134	913
MMM products
Revenue from External Customer [Line Items]
Net sales	$ 927	$ 1,724

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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+ Details