Stockholders' Deficit, Option Plans, and Employee Benefit Plan (Details)	1 Months Ended		12 Months Ended
	Jun. 30, 2008 shares	Mar. 31, 2006 shares	Dec. 31, 2016 USD ($) Vote shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2004 $ / shares shares	Dec. 31, 1996	Dec. 31, 2016 shares	Dec. 31, 2014 $ / shares shares	Dec. 31, 2006 shares	May 10, 2004 shares
Common Stock [Abstract]
Number of votes per share | Vote			1
Stock Options [Abstract]
Shares available for issuance (in shares)										6,644,974
Term of stock options							10
Vesting period of stock options			5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year (in shares)				0	20,000
Granted (in shares)					0
Exercised (in shares)					(20,000)
Cancelled (in shares)					0
Outstanding at end of year (in shares)				0	20,000				0
Exercisable at end of year (in shares)									0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of year (in dollars per share) | $ / shares				$ 0	$ 0.62
Granted (in dollars per share) | $ / shares						$ 0
Exercised (in dollars per share) | $ / shares					0.62
Cancelled (in dollars per share) | $ / shares					0
Outstanding at end of year (in dollars per share) | $ / shares					$ 0
Exercisable at end of year (in dollars per share) | $ / shares									$ 0
Telos Shared Savings Plan [Abstract]
Shares held in defined contribution employee savings plan (in shares)			3,658,536
Employer matching percentage			50.00%
Maximum contribution percentage			2.00%
Annual vesting percentage			20.00%
Contributions to the Plan | $			$ 575,000	$ 0	$ 624,000
Telos ID [Member]
Telos Shared Savings Plan [Abstract]
Employer matching percentage			50.00%
Maximum contribution percentage			2.00%
Contributions to the Plan | $			$ 96,000	$ 0	$ 83,000
1996 Stock Option Plan [Member]
Restricted Stock Grants [Abstract]
Stock options exchanged for restricted stocks (in shares)	2,463,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year (in shares)			20,000
Outstanding at end of year (in shares)			20,000	20,000				0
Telos Delaware Stock Incentive Plan [Member]
Restricted Stock Grants [Abstract]
Stock options exchanged for restricted stocks (in shares)	983,379
Xacta Stock Incentive Plan [Member]
Restricted Stock Grants [Abstract]
Stock options exchanged for restricted stocks (in shares)	2,498,564
Restricted Stock [Member]
Restricted Stock Grants [Abstract]
Restricted stock vested on date of grant			25.00%
Restricted stock vest on anniversary of the date of grant			25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at end of year (in shares)								19,047,259
Stock Options [Member] | 1996 Stock Option Plan [Member]
Stock Options [Abstract]
Shares available for issuance (in shares)											7,345,433
Vesting period of stock options							4 years
Additional shares authorized (in shares)						700,459
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Exercised (in shares)					20,000
Cancelation of unissued options (in shares)		516,000