Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 30, 2022	Jun. 30, 2021
Document Information [Line Items]
Entity Central Index Key	0001320760
Entity Registrant Name	TSS, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-33627
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-2027651
Entity Address, Address Line One	110 E. Old Settlers Road
Entity Address, Postal Zip Code	78664
Entity Address, City or Town	Round Rock
Entity Address, State or Province	TX
City Area Code	512
Local Phone Number	310-1000
Title of 12(g) Security	Common Stock, $.0001 par value
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 6,586,857
Entity Common Stock, Shares Outstanding		18,868,321
Auditor Name	WEAVER AND TIDWELL, L.L.P.
Auditor Location	Austin, Texas
Auditor Firm ID	410