Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual)
₫ in Millions, ¥ in Millions
12 Months Ended
Mar. 11, 2020
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
CNY (¥)
Nov. 30, 2019
VND (₫)
Goodwill, Impairment Loss   $ 0 $ 1,764,000    
Foreign Currency Transaction Gain (Loss), Unrealized   (335,000) (355,000)    
Selling, General and Administrative Expenses [Member]          
Depreciation, Depletion and Amortization, Nonproduction, Total   410,000 387,000    
CHINA          
Restricted Cash and Cash Equivalents, Total     2,900,000 ¥ 20  
VIET NAM          
Restricted Cash and Cash Equivalents, Total   $ 433,000 $ 432,000   ₫ 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 79.00%        
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