CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 106,045	$ 6,751
Accounts receivable, net of reserve of $308 and $720, respectively (Note 5)	30,913	27,942
Inventories, net of obsolescence reserve of $851 and $860, respectively (Note 1)	3,311	1,965
Prepaid expenses	3,059	1,717
Deferred program expenses	5	673
Other current assets	781	1,197
Total current assets	144,114	40,245
Property, equipment, and capitalized software development costs
Furniture and equipment	25,827	18,709
Leasehold improvements	2,669	2,536
Property and equipment under finance leases	30,792	30,792
Property and equipment, gross	59,288	52,037
Accumulated depreciation and amortization	(36,891)	(32,470)
Property and equipment, net	22,397	19,567
Operating lease right-of-use assets	1,464	1,979
Goodwill (Note 3)	14,916	14,916
Other assets	926	985
Total assets	183,817	77,692
Current liabilities
Accounts payable and other accrued liabilities (Note 6)	20,899	15,050
Accrued compensation and benefits	8,474	12,187
Contract liabilities (Notes 1 and 6)	5,654	6,337
Operating lease obligations - short term (Note 10)	677	602
Finance lease obligations - short-term (Note 10)	1,339	1,224
Other current liabilities	1,903	1,903
Total current liabilities	38,946	37,303
Senior term loan, net of unamortized discount and issuance costs (Note 6)	0	16,335
Subordinated debt (Note 6)	0	2,927
Finance lease obligations - long-term (Note 10)	14,301	15,641
Operating lease obligations - long-term (Note 10)	941	1,553
Deferred income taxes (Note 9)	652	621
Public preferred stock (Note 7)	0	139,210
Other liabilities (Note 9)	1,873	724
Total liabilities	56,713	214,314
Commitments and contingencies (Notes 10 and 13)
Telos stockholders' equity (deficit)
Common stock	103	0
Additional paid-in capital	270,800	4,310
Accumulated other comprehensive income	44	6
Accumulated deficit	(143,843)	(145,530)
Total Telos stockholders' equity (deficit)	127,104	(141,136)
Non-controlling interest in subsidiary (Note 2)	0	4,514
Total stockholders' equity (deficit)	127,104	(136,622)
Total liabilities and stockholders' equity (deficit)	183,817	77,692
Class A Common Stock [Member]
Telos stockholders' equity (deficit)
Common stock	0	65
Class B Common Stock [Member]
Telos stockholders' equity (deficit)
Common stock	$ 0	$ 13