Basis of Presentation and Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from External Customer [Line Items]
Net sales	$ 5,964	$ 2,915	$ 13,082	$ 9,174
Commercial
Revenue from External Customer [Line Items]
Net sales	1,456	1,733	4,250	5,847
MMM products
Revenue from External Customer [Line Items]
Net sales	$ 4,508	$ 1,182	$ 8,832	$ 3,327