Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Common Stock - Assumptions (Details)

v3.21.2
Note 11 - Common Stock - Assumptions (Details) - Warrant [Member]
May 04, 2021
May 03, 2021
Jan. 19, 2021
Jan. 18, 2021
Measurement Input, Exercise Price [Member] | Series B Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     3.40 6.10
Measurement Input, Exercise Price [Member] | Series A-2 and Series B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     3.40 6.37
Measurement Input, Exercise Price [Member] | Series B, A-2 and B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input 2.82 3.40    
Measurement Input, Share Price [Member] | Series B Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     3.19 3.19
Measurement Input, Share Price [Member] | Series A-2 and Series B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     3.19 3.19
Measurement Input, Share Price [Member] | Series B, A-2 and B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input 3.01 3.01    
Measurement Input, Expected Term [Member] | Series B Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     3.9 3.9
Measurement Input, Expected Term [Member] | Series A-2 and Series B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     4.3 4.3
Measurement Input, Expected Term [Member] | Series B, A-2 and B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input 3.6 3.6    
Measurement Input, Price Volatility [Member] | Series B Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     0.90 0.90
Measurement Input, Price Volatility [Member] | Series A-2 and Series B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     0.90 0.90
Measurement Input, Price Volatility [Member] | Series B, A-2 and B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input 0.80 0.80    
Measurement Input, Risk Free Interest Rate [Member] | Series B Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     0.0033 0.0033
Measurement Input, Risk Free Interest Rate [Member] | Series A-2 and Series B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     0.0033 0.0033
Measurement Input, Risk Free Interest Rate [Member] | Series B, A-2 and B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input 0.0058 0.0058    
Measurement Input, Expected Dividend Rate [Member] | Series B Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     0 0
Measurement Input, Expected Dividend Rate [Member] | Series A-2 and Series B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input     0 0
Measurement Input, Expected Dividend Rate [Member] | Series B, A-2 and B-2 Warrants [Member]        
Warrants and Rights Outstanding, Measurement Input 0 0