Accounts Receivable and Significant Concentrations (Details 2) - Sales Revenue, Net	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
U.S. Immigration and Customs Enforcement
Concentration risk	19.00%	0.00%	19.00%	10.00%
U.S. Department of Homeland Security Headquarters
Concentration risk	12.00%	0.00%	13.00%	0.00%
U.S. Transportation Safety Administration
Concentration risk	10.00%	0.00%	0.00%	0.00%
U.S. Coast Guard
Concentration risk	12.00%	0.00%	16.00%	0.00%
U.S. Census Bureau
Concentration risk	0.00%	60.00%	0.00%	51.00%