CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue (Note 5)
Revenue	$ 138,016	$ 107,727	$ 134,868
Costs and expenses
Total costs and expenses	84,954	67,161	91,422
Selling, general and administrative expenses	44,048	40,152	41,334
Operating income	9,014	414	2,112
Other income (expenses)
Non-operating income	12	11	18
Interest expense	(7,258)	(6,690)	(5,465)
Income (loss) before income taxes	1,768	(6,265)	(3,335)
(Provision) benefit for income taxes (Note 9)	(31)	2,767	(334)
Net income (loss)	1,737	(3,498)	(3,669)
Less: Net income attributable to non-controlling interest (Note 2)	(3,377)	(2,335)	(3,506)
Net loss attributable to Telos Corporation	(1,640)	(5,833)	(7,175)
Services [Member]
Revenue (Note 5)
Revenue	120,990	81,606	112,881
Costs and expenses
Total costs and expenses	76,857	49,965	77,578
Products [Member]
Revenue (Note 5)
Revenue	17,026	26,121	21,987
Costs and expenses
Total costs and expenses	$ 8,097	$ 17,196	$ 13,844