Note 14 - Activity of Business Segments - Consolidated Net Sales and Long-lived Asset Information by Geographic Area (Details) - Reportable Geographical Components [Member] - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 57,840,000	$ 61,232,000
Consolidated long-lived assets	8,520,000	5,587,000
UNITED STATES
Revenues	57,211,000	60,882,000
Consolidated long-lived assets	7,325,000	4,340,000
International Member
Revenues	629,000	350,000
Consolidated long-lived assets	$ 1,195,000	$ 1,247,000