Domestic and Foreign Revenues - Significant Foreign Revenues from Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 8,108	$ 6,536
Malaysia [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	1,293	609
Hong Kong [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	237	189
All other foreign countries [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	866	550
Foreign [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	2,396	1,348
Domestic [Member]
Entity Wide Revenue Major Customer [Line Items]
Revenues from operations	$ 5,712	$ 5,188