CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue (Note 5)
Revenue	$ 159,218	$ 138,016	$ 107,727
Costs and expenses
Total costs and expenses	106,874	84,954	67,161
Selling, general and administrative expenses	47,319	44,048	40,152
Operating income	5,025	9,014	414
Other income (expenses)
Non-operating income	201	12	11
Interest expense	(7,467)	(7,258)	(6,690)
(Loss) income before income taxes	(2,241)	1,768	(6,265)
Benefit (provision) from income taxes (Note 7)	104	(31)	2,767
Net (loss) income	(2,137)	1,737	(3,498)
Less: Net income attributable to non-controlling interest (Note 2)	(4,264)	(3,377)	(2,335)
Net loss attributable to Telos Corporation (1)(2)	(6,401)	(1,640)	(5,833)
Services [Member]
Revenue (Note 5)
Revenue	143,581	120,990	81,606
Costs and expenses
Total costs and expenses	98,772	76,857	49,965
Products [Member]
Revenue (Note 5)
Revenue	15,637	17,026	26,121
Costs and expenses
Total costs and expenses	$ 8,102	$ 8,097	$ 17,196