Stockholders' Deficit, Option Plans, and Employee Benefit Plan (Details)	1 Months Ended	12 Months Ended
	May 31, 2017 shares	Dec. 31, 2019 USD ($) Vote shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares
Common Stock [Abstract]
Number of votes per share | Vote		1
Restricted Stock Grants [Rollforward]
Outstanding at beginning of year (in shares)		4,920,000	4,975,000	0
Granted	5,005,000	0	0	5,005,000
Forfeited		(15,000)	(55,000)	(30,000)
Outstanding at end of year (in shares)		4,905,000	4,920,000	4,975,000
Restricted stock remained subject to vesting (in shares)		1,198,750
Telos Shared Savings Plan [Abstract]
Shares held in defined contribution employee savings plan (in shares)		3,658,536
Maximum contribution percentage		2.00%
Annual vesting percentage		20.00%
Vesting period of stock options		5 years
Contributions to the Plan | $		$ 861,000	$ 721,000	$ 617,000
Telos ID [Member]
Telos Shared Savings Plan [Abstract]
Maximum contribution percentage		2.00%
Contributions to the Plan | $		$ 151,000	$ 125,000	$ 105,000
Restricted Stock [Member]
Restricted Stock Grants [Rollforward]
Restricted stock vested on date of grant		25.00%
Restricted stock vest on anniversary of the date of grant		25.00%