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Note 2 - Business (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Number of Countries in which Entity Operates	9		9
Number of Reportable Segments			3
Net Income (Loss) Attributable to Parent, Total	$ (32,000)	$ 1,180,000	$ 1,789,000	$ 2,611,000
SPAR China [Member]
Net Income (Loss) Attributable to Parent, Total	$ 73,000	25,000	$ 348,000	23,000
Increase (Decrease) in Revenues		$ 276,000		$ 2,300,000
Increase (Decrease) in Revenues, Percentage		7.00%		22.00%

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