CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 72	$ 600
Accounts receivable, net of reserve of $306 and $411, respectively (Note 1)	34,542	24,520
Inventories, net of obsolescence reserve of $520 and $1,484, respectively (Note 1)	4,389	13,520
Deferred program expenses	244	2,071
Other current assets	1,985	1,439
Total current assets	41,232	42,150
Property and equipment (Note 1)
Furniture and equipment	12,756	8,964
Leasehold improvements	2,503	2,389
Property and equipment under capital leases	30,832	30,832
Property and equipment, gross	46,091	42,185
Accumulated depreciation and amortization	(28,665)	(25,841)
Property and equipment, net	17,426	16,344
Goodwill (Note 3)	14,916	14,916
Other assets	915	1,011
Total assets	74,489	74,421
Current liabilities
Accounts payable and other accrued payables (Note 6)	21,779	25,693
Accrued compensation and benefits	9,082	7,456
Contract liabilities	5,232	10,073
Capital lease obligations - short-term	1,115	1,013
Other current liabilities	1,895	1,990
Total current liabilities	39,103	46,225
Senior term loan, net of unamortized discount and issuance costs (Note 6)	10,984	10,786
Subordinated debt (Note 6)	2,597	2,289
Capital lease obligations (Note 10)	16,865	17,980
Deferred income taxes (Note 9)	818	741
Public preferred stock (Note 7)	135,387	131,565
Other liabilities (Note 7)	838	872
Total liabilities	206,592	210,458
Commitments and contingencies (Notes 10 and 13)
Telos stockholders' deficit
Additional paid-in capital	4,310	4,310
Accumulated other comprehensive income	17	32
Accumulated deficit	(139,129)	(141,370)
Total Telos stockholders' deficit	(134,724)	(136,950)
Non-controlling interest in subsidiary (Note 2)	2,621	913
Total stockholders' deficit	(132,103)	(136,037)
Total liabilities, redeemable preferred stock, and stockholders' deficit	74,489	74,421
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