Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Warrants - Assumptions Used (Details)

v3.21.2
Note 4 - Warrants - Assumptions Used (Details)
Jun. 30, 2021
Dec. 31, 2020
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Warrants, assumptions 0.001 0.001
Minimum [Member] | Measurement Input, Price Volatility [Member]    
Warrants, assumptions 0.876 1.137
Minimum [Member] | Measurement Input, Expected Term [Member]    
Warrants, assumptions 0.6 1.1
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Warrants, assumptions 0.007 0.003
Maximum [Member] | Measurement Input, Price Volatility [Member]    
Warrants, assumptions 1.291 1.274
Maximum [Member] | Measurement Input, Expected Term [Member]    
Warrants, assumptions 4.1 4.6