Revenues and Trade Receivables, Net, Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Geographic Areas, Revenues from External Customers [Abstract]
Revenues	$ 15,345	$ 21,675	$ 26,467	$ 30,440
United States
Geographic Areas, Revenues from External Customers [Abstract]
Revenues	13,107	21,423	22,957	28,929
Ex-United States
Geographic Areas, Revenues from External Customers [Abstract]
Revenues	$ 2,238	$ 252	$ 3,510	$ 1,511