Revenues and Trade Receivables, Net, 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
Geographic Areas, Revenues from External Customers [Abstract]
Revenues	$ 13,287	$ 8,260	$ 39,754	$ 38,700
United States
Geographic Areas, Revenues from External Customers [Abstract]
Revenues	10,530	6,567	33,487	35,496
Ex-United States
Geographic Areas, Revenues from External Customers [Abstract]
Revenues	$ 2,757	$ 1,693	$ 6,267	$ 3,204