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Note 4 - PistolStar, Inc. Acquisition (Details Textual) - PistolStar [Member] - USD ($)
Jan. 21, 2021
Jun. 30, 2020
Dec. 31, 2020
Business Combination, Consideration Transferred, Total   $ 2,500,000  
Payments to Acquire Businesses, Net of Cash Acquired, Total   2,000,000.0  
Business Combination, Consideration Transferred, Liabilities Incurred   $ 500,000  
Promissory Note [Member]      
Debt Instrument, Interest Rate, Stated Percentage   4.00%  
Debt Instrument, Number of Installments   4  
Debt Instrument, Term (Month)   12 months  
Notes Payable, Total     $ 232,000
Repayments of Notes Payable $ 250,000