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Note 9 - Related Party Notes Payable (Details Textual) - USD ($)
12 Months Ended
Jun. 25, 2019
Feb. 27, 2019
Dec. 31, 2019
Pioneer Hong Kong [Member] | Promissory Note [Member]      
Debt Instrument, Face Amount   $ 1,000,000  
Debt Instrument, Periodic Payment, Interest $ 300,000 150,000  
Debt Issuance Costs, Net, Total   $ 20,000  
Gains (Losses) on Restructuring of Debt $ 0    
Interest Expense, Total     $ 222
China Kington [Member]      
Brokering Fee, Percent   2.00%  
Consulting Agreement, Term   1 year  
Director Bob Wu [Member]      
Consulting Agreement, Amount   $ 100,000