Annual report pursuant to Section 13 and 15(d)

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

v3.22.4
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual)
₫ in Billions
 12 Months Ended 24 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2022
USD ($)
Nov. 30, 2019
VND (₫)
Foreign Currency Transaction Gain (Loss), Unrealized $ (272,000) $ (248,000)    
Cash and Cash Equivalents, at Carrying Value, Total 69,667,000 83,843,000 $ 69,667,000  
Selling, General and Administrative Expenses [Member]        
Depreciation, Depletion and Amortization, Nonproduction, Total $ 204,000   $ 299,000  
VIET NAM        
Restricted Cash and Cash Equivalents, Total   $ 438,000   ₫ 10
KOREA, DEMOCRATIC PEOPLE'S REPUBLIC OF        
Restricted Cash, Collateral Requirement Percentage 100.00%   100.00%  
HONG KONG | Revenue from Contract with Customer Benchmark [Member] | Geographic Concentration Risk [Member]        
Concentration Risk, Percentage 78.00%      
CHINA        
Cash and Cash Equivalents, at Carrying Value, Total $ 4,200,000   $ 4,200,000  
Minimum [Member]        
Cash and Cash Equivalents, Period to Receive Cash Proceeds From Credit Card Processors (Day) 2 days      
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 (Day) 5 days      
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