Stockholders' Deficit, Option Plans, and Employee Benefit Plan (Details)	1 Months Ended			12 Months Ended
	Mar. 31, 2013 shares	Jun. 30, 2008 shares	Mar. 31, 2006 shares	Dec. 31, 2015 USD ($) Vote $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares	Dec. 31, 2004 $ / shares shares	Dec. 31, 1996	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	0
Exercised (in shares)					(20,000)	0
Cancelled (in shares)					0	0
Outstanding at end of year (in shares)				0	20,000	20,000			0
Exercisable at end of year (in shares)						20,000			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	$ 0
Exercised (in dollars per share) | $ / shares					0.62	0
Cancelled (in dollars per share) | $ / shares					0	0
Outstanding at end of year (in dollars per share) | $ / shares					$ 0	0.62
Exercisable at end of year (in dollars per share) | $ / shares						$ 0.62			$ 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 | $				$ 0	$ 624,000	$ 598,000
Telos ID [Member]
Telos Shared Savings Plan [Abstract]
Employer matching percentage				50.00%
Maximum contribution percentage				2.00%
Contributions to the Plan | $				$ 0	$ 83,000	$ 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)				0	20,000	20,000
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
Executive Officers and Employees [Member]
Restricted Stock Grants [Abstract]
Restricted stock issued during the period (in shares)	4,312,000
Restricted Stock [Member]
Restricted Stock Grants [Abstract]
Restricted stock issued during the period (in shares)	4,312,000
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