Cover	12 Months Ended
	Dec. 31, 2022 USD ($) shares
Document Information [Line Items]
Document Type	10-K/A
Document Annual Report	true
Document Transition Report	false
Document Financial Statement Error Correction [Flag]	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	false
Amendment Flag	true
Amendment Description	SPAR
Document Period End Date	Dec. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Information [Line Items]
Entity Registrant Name	SPAR GROUP, INC.
Entity Central Index Key	0001004989
Entity File Number	0-27408
Entity Tax Identification Number	33-0684451
Entity Incorporation, State or Country Code	DE
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Public Float | $	$ 12,639,963
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	1910 Opdyke Court
Entity Address, City or Town	Auburn Hills
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48326
Entity Phone Fax Numbers [Line Items]
City Area Code	248
Local Phone Number	364-7727
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	SGRP
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding | shares	22,648,168