v3.25.4
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, 2025
Dec. 31, 2024
Revenues $ 59,142,000 $ 57,840,000
Consolidated long-lived assets 8,234,000 8,520,000
UNITED STATES    
Revenues 58,527,000 57,211,000
Consolidated long-lived assets 6,953,000 7,325,000
Non-US [Member]    
Revenues 615,000 629,000
Consolidated long-lived assets $ 1,281,000 $ 1,195,000