Cover - shares	6 Months Ended
	Jun. 30, 2024	Aug. 02, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-08443
Entity Registrant Name	TELOS CORPORATION
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	52-0880974
Entity Address, Address Line One	19886 Ashburn Road
Entity Address, City or Town	Ashburn
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	20147-2358
City Area Code	703
Local Phone Number	724-3800
Title of 12(b) Security	Common stock, $0.001 par value per share
Trading Symbol	TLS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		72,256,759
Entity Central Index Key	0000320121
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2