Note 12 - Segment Information - Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue:	$ 261,268	$ 255,719
Operating income (loss):	5,386	4,183
Interest expense (income):	965	585
Other expense (income), net:	(482)	(510)
Income before income tax expense:	4,903	4,108
Income tax expense:	2,777	2,108
Net income (loss):	2,126	2,000
Net income attributable to non-controlling interest:	(2,858)	(3,779)
Net (loss) income attributable to SPAR Group, Inc.:	(732)	(1,779)
Depreciation and amortization:	2,033	2,083
Impairment of goodwill	2,458	0
Impairment of goodwill	2,458	0
Capital expenditures	1,925	1,722
Capital expenditures	1,925	1,722
Americas [Member]
Revenue:	198,581	186,430
Operating income (loss):	4,103	2,427
Interest expense (income):	675	551
Other expense (income), net:	(38)	74
Income before income tax expense:	3,466	1,802
Income tax expense:	1,949	865
Net income (loss):	1,517	937
Net income attributable to non-controlling interest:	(1,857)	(1,604)
Net (loss) income attributable to SPAR Group, Inc.:	(340)	(667)
Depreciation and amortization:	1,821	1,974
Impairment of goodwill	2,458	0
Impairment of goodwill	2,458	0
Capital expenditures	1,805	1,560
Capital expenditures	1,805	1,560
Asia Pacific [Member]
Revenue:	26,009	33,791
Operating income (loss):	(1,621)	(967)
Interest expense (income):	39	(9)
Other expense (income), net:	(62)	(341)
Income before income tax expense:	(1,598)	(617)
Income tax expense:	(18)	498
Net income (loss):	(1,580)	(1,115)
Net income attributable to non-controlling interest:	650	103
Net (loss) income attributable to SPAR Group, Inc.:	(930)	(1,012)
Depreciation and amortization:	104	67
Impairment of goodwill	(0)	0
Impairment of goodwill	(0)	0
Capital expenditures	20	25
Capital expenditures	20	25
EMEA [Member]
Revenue:	36,678	35,498
Operating income (loss):	2,904	2,723
Interest expense (income):	251	43
Other expense (income), net:	(382)	(243)
Income before income tax expense:	3,035	2,923
Income tax expense:	846	745
Net income (loss):	2,189	2,178
Net income attributable to non-controlling interest:	(1,651)	(2,278)
Net (loss) income attributable to SPAR Group, Inc.:	538	(100)
Depreciation and amortization:	108	42
Impairment of goodwill	(0)	0
Impairment of goodwill	(0)	0
Capital expenditures	100	137
Capital expenditures	$ 100	$ 137