Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 15, 2023	Jun. 30, 2022
Document Information [Line Items]
Entity Central Index Key	0001004989
Entity Registrant Name	SPAR GROUP, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	0-27408
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	33-0684451
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
City Area Code	248
Local Phone Number	364-7727
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	SGRP
Security Exchange Name	NASDAQ
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			$ 13,000,000
Entity Common Stock, Shares Outstanding		21,845,414
Auditor Name	BDO USA, LLP
Auditor Location	Troy, Michigan
Auditor Firm ID	243