Note 1 - Basis of Presentation - Revenues and Profit (Loss) Allocations to Reportable Segments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 4,099,000	$ 4,670,000	$ 12,939,000	$ 13,229,000
Net Income (Loss) Attributable to Parent, Total	$ 33,000	$ (209,000)	(25,000)	(827,000)
Domestic Segment [Member]
Revenues			10,892,000	910,000
Net Income (Loss) Attributable to Parent, Total			(1,000)	9,000
Foreign Segment [Member]
Revenues			2,047,000	12,319,000
Net Income (Loss) Attributable to Parent, Total			$ (24,000)	$ (836,000)