CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 600	$ 659
Accounts receivable, net of reserve of $411 and $429, respectively (Note 5)	24,520	19,087
Inventories, net of obsolescence reserve of $1,484 and $1,672, respectively (Note 1)	13,520	3,552
Deferred program expenses	2,071	186
Other current assets	1,439	1,521
Total current assets	42,150	25,005
Property and equipment (Note 1)
Furniture and equipment	8,964	6,912
Leasehold improvements	2,389	2,399
Property and equipment under capital leases	30,832	30,829
Property and equipment, gross	42,185	40,140
Accumulated depreciation and amortization	(25,841)	(24,023)
Property and equipment, net	16,344	16,117
Goodwill (Note 3)	14,916	14,916
Other assets	1,011	761
Total assets	74,421	56,799
Current liabilities
Accounts payable and other accrued payables (Note 6)	25,693	15,317
Accrued compensation and benefits	7,456	8,071
Deferred revenue	10,073	4,900
Subordinated debt - short-term (Note 6)	0	3,029
Capital lease obligations - short-term	1,013	918
Other current liabilities	1,990	1,406
Total current liabilities	46,225	33,641
Senior term loan, net of unamortized discount and issuance costs (Note 6)	10,786	0
Subordinated debt (Note 6)	2,289	0
Capital lease obligations (Note 10)	17,980	18,990
Deferred income taxes (Note 9)	741	3,391
Senior redeemable preferred stock (Note 7)	0	2,092
Public preferred stock (Note 7)	131,565	127,742
Other liabilities (Note 9)	872	919
Total liabilities	210,458	186,775
Commitments, contingencies and subsequent events (Notes 10 and 13)	0	0
Telos stockholders' deficit
Additional paid-in capital	4,310	3,229
Accumulated other comprehensive income	32	25
Accumulated deficit	(141,370)	(135,537)
Total Telos stockholders' deficit	(136,950)	(132,205)
Non-controlling interest in subsidiary (Note 2)	913	2,229
Total stockholders' deficit	(136,037)	(129,976)
Total liabilities, redeemable preferred stock, and stockholders' deficit	74,421	56,799
Class A Common Stock [Member]
Telos stockholders' deficit
Common stock	65	65
Total stockholders' deficit	65	65
Class B Common Stock [Member]
Telos stockholders' deficit
Common stock	13	13
Total stockholders' deficit	$ 13	$ 13