Note 1 - Basis of Presentation - Revenues and Profit (Loss) Allocations to Reportable Segments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues	$ 5,568,000	$ 5,034,000	$ 10,493,000	$ 9,881,000
Net Income (Loss) Attributable to Parent	(111,000)	497,000	77,000	766,000
Domestic Segment [Member]
Revenues	4,812,000	4,140,000	9,041,000	8,281,000
Net Income (Loss) Attributable to Parent	(26,000)	450,000	229,000	705,000
Foreign Segment [Member]
Revenues	756,000	894,000	1,452,000	1,600,000
Net Income (Loss) Attributable to Parent	$ (85,000)	$ 47,000	$ (152,000)	$ 61,000