Quarterly report [Sections 13 or 15(d)]

Note 5 - Leases (Details Textual)

v3.25.1
Note 5 - Leases (Details Textual)
3 Months Ended
Mar. 31, 2025
USD ($)
ft²
a
Mar. 31, 2024
USD ($)
Operating Lease, Payments | $ $ 309,000 $ 320,000
Rolling Hills Estates [Member]    
Area of Land (Square Foot) 4,900  
HONG KONG    
Area of Land (Square Foot) | a 7,300  
Richmond, British Columbia [Member]    
Area of Land (Square Foot) 1,600  
Metuchen, New Jersey [Member]    
Area of Land (Square Foot) 2,000  
CHINA    
Lessee, Number of Branches 7