Annual report pursuant to Section 13 and 15(d)

Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual)

v3.24.0.1
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Unrealized Gain (Loss), Foreign Currency Transaction, before Tax $ (292,000) $ (272,000)
Selling, General and Administrative Expenses [Member]    
Depreciation, Depletion and Amortization, Nonproduction 164,000 $ 204,000
HONG KONG    
Cash, Uninsured Amount 890,000  
CHINA    
Restricted Cash $ 3,700,000  
KOREA, DEMOCRATIC PEOPLE'S REPUBLIC OF    
Restricted Cash, Collateral Requirement Percentage 100.00%  
Minimum [Member]    
Cash and Cash Equivalents, Period to Receive Cash Proceeds From Credit Card Processors (Year) 2 years  
Minimum [Member] | Office Equipment, Office Software and Capitalized Internal-use Software Development [Member]    
Property, Plant and Equipment, Useful Life (Year) 3 years  
Minimum [Member] | Furniture and Fixtures [Member]    
Property, Plant and Equipment, Useful Life (Year) 5 years  
Maximum [Member]    
Cash and Cash Equivalents, Period to Receive Cash Proceeds From Credit Card Processors (Year) 5 years  
Maximum [Member] | Office Equipment, Office Software and Capitalized Internal-use Software Development [Member]    
Property, Plant and Equipment, Useful Life (Year) 5 years  
Maximum [Member] | Furniture and Fixtures [Member]    
Property, Plant and Equipment, Useful Life (Year) 7 years