CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income (loss)	$ 6,841	$ (2,137)	$ 1,737
Adjustments to reconcile net income (loss) to cash (used in) provided by operating activities:
Gain on redemption of public preferred stock	(14,012)	0	0
Loss on early extinguishment of debt and other transactions	275	0	0
Stock-based compensation	4	0	0
Dividends from preferred stock recorded as interest expense	3,384	3,823	3,822
Depreciation and amortization	5,353	4,972	3,028
Provision for inventory obsolescence	(1)	376	30
(Benefit) provision for doubtful accounts receivable	(412)	414	(105)
Provision for doubtful non-trade receivables	569	0	0
Amortization of debt issuance costs	978	461	198
Deferred income tax provision (benefit)	31	(197)	77
Loss on disposal of fixed assets	1	15	3
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	(2,559)	6,186	(9,917)
(Increase) decrease in inventories	(1,345)	2,048	9,101
Decrease (increase) in deferred program expenses	668	(429)	1,828
Increase in other current assets and other assets	(1,606)	(3,576)	(465)
Increase (decrease) in accounts payable and other accrued payables	3,413	(6,730)	(3,914)
(Decrease) increase in accrued compensation and benefits	(3,713)	3,105	1,626
(Decrease) increase in contract liabilities	(683)	1,106	(960)
Increase in other current liabilities and other liabilities	710	2,379	179
Cash (used in) provided by operating activities	(2,104)	11,816	6,268
Investing activities:
Capitalized software development costs	(6,681)	(2,442)	(1,649)
Purchases of property and equipment	(780)	(4,090)	(2,465)
Cash used in investing activities	(7,461)	(6,532)	(4,114)
Financing activities:
Proceeds from initial public offering	272,813	0	0
Redemption of public preferred stock	(108,878)	0	0
Purchase of Telos ID membership interest	(30,000)	0	0
Payment of senior term loan	(17,351)	0	0
Payment of subordinated debt	(3,657)	0	0
Proceeds from senior term loan	0	4,881	0
Payments under finance lease obligations	(1,225)	(1,115)	(1,013)
Amendment fee paid to lender	(100)	0	0
Distributions to Telos ID Class B member - non-controlling interest	(2,743)	(2,371)	(1,669)
Cash provided by (used in) financing activities	108,859	1,395	(2,682)
Increase (decrease) in cash and cash equivalents	99,294	6,679	(528)
Cash and cash equivalents, beginning of the year	6,751	72	600
Cash and cash equivalents, end of year	106,045	6,751	72
Cash paid during the year for:
Interest	7,259	3,299	2,483
Income taxes	64	40	19
Noncash:
Dividends from preferred stock recorded as interest expense	3,384	3,823	3,822
Common stock issued on redemption of public preferred stock (Note 7)	19,213	0	0
Common stosck issued on purchase of Telos ID membership interest (Note 2)	148,399	0	0
Distributions to Telos ID Class B member - non-controlling interest	2,436	0	0
Debt issuance costs and prepayment of interest on senior term loan	$ 0	$ 119	$ 0