CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Accounts receivable, reserve	$ 429	$ 485
Inventories, obsolescence reserve	$ 1,672	$ 1,457
Class A Common Stock [Member]
Telos stockholders' deficit
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	40,238,461	40,238,461
Common stock, shares outstanding (in shares)	40,238,461	40,238,461
Class B Common Stock [Member]
Telos stockholders' deficit
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	5,000,000	5,000,000
Common stock, shares issued (in shares)	4,037,628	4,037,628
Common stock, shares outstanding (in shares)	4,037,628	4,037,628