Annual report pursuant to Section 13 and 15(d)

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

v3.22.0.1
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual)
₫ in Billions
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Nov. 30, 2019
VND (₫)
Foreign Currency Transaction Gain (Loss), Unrealized $ (248,000) $ (335,000)  
Selling, General and Administrative Expenses [Member]      
Depreciation, Depletion and Amortization, Nonproduction, Total 299,000 410,000  
VIET NAM      
Restricted Cash and Cash Equivalents, Total $ 438,000 $ 433,000 ₫ 10
KOREA, DEMOCRATIC PEOPLE'S REPUBLIC OF      
Restricted Cash, Collateral Requirement Percentage 100.00%    
HONG KONG | Revenue from Contract with Customer Benchmark [Member] | Geographic Concentration Risk [Member]      
Concentration Risk, Percentage 78.00%    
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