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Note 2 - Business (Details Textual)	3 Months Ended			6 Months Ended
	Jun. 30, 2022 USD ($)	Mar. 31, 2022	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Number of Countries in which Entity Operates		9
Number of Reportable Segments		3
Net Income (Loss) Attributable to Parent, Total	$ 1,149,000		$ 514,000	$ 1,821,000	$ 1,431,000
SPAR China [Member]
Net Income (Loss) Attributable to Parent, Total	$ 329,000		13,000	(420,000)	$ (2,000)
Increase (Decrease) in Revenues			$ (2,000,000.0)	$ (1,600,000)
Increase (Decrease) in Revenues, Percentage	50.00%		31.00%	50.00%	31.00%

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