Note 2 - Accounting Policies - Property and Equipment Allocations to Reportable Segments (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
TOTAL ASSETS	$ 43,956,000	$ 45,430,000
Domestic Segment [Member]
TOTAL ASSETS	37,575,000	39,322,000
Foreign Segment [Member]
TOTAL ASSETS	$ 6,381,000	$ 6,108,000