Revenue (Tables)

3 Months Ended

Mar. 31, 2022

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue

The following tables disclose revenue for our operating segments disaggregated by several categories for the three months ended March 31, 2022 and 2021.

	Three Months Ended March 31,
Revenue Type	2022		2021
Security Solutions
Services	$	24,867	$	19,130
Product	2,052		3,699
	26,919		22,829
Secure Networks
Services	23,241		32,928
	23,241		32,928
Total revenue	$	50,160	$	55,757

	Three Months Ended March 31,
Customer Type	2022		2021
Security Solutions
Federal	$	24,602	$	20,451
State & Local, and Commercial	2,317		2,378
	26,919		22,829
Secure Networks
Federal	23,241		32,897
State & Local, and Commercial	—		31
	23,241		32,928
Total revenue	$	50,160	$	55,757

	Three Months Ended March 31,
Contract Type	2022		2021
Security Solutions
Firm fixed-price	$	22,467	$	18,012
Time-and-materials	2,916		3,001
Cost plus fixed fee	1,536		1,816
	26,919		22,829
Secure Networks
Firm fixed-price	18,810		31,129
Time-and-materials	—		29
Cost plus fixed fee	4,431		1,770
	23,241		32,928
Total revenue	$	50,160	$	55,757

Schedules of Concentration of Risk, by Risk Factor

The percentage of total revenue for the U.S. government, its agencies and other customers comprising more than 10% of total revenue is as follows:

	Three Months Ended March 31,
	2022		2021
U.S. Department of Defense ("DoD")	71.4	%	84.3	%
Civilian	24.0	%	11.4	%

Contract with Customer, Contract Asset, Contract Liability, and Receivable

Contract balances for the periods presented are as follow (in thousands):

	March 31, 2022		December 31, 2021
Contract assets (unbilled receivables)	$	32,579	$	41,374
Contract liabilities	$	7,036	$	6,381