Annual report pursuant to Section 13 and 15(d)

Note 3 - Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)

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Note 3 - Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Fair value of liabilities $ 3,852,882 $ 583,734
Stock Purchase Warrants [Member]    
Liability classified stock purchase warrants 3,852,882 583,734
Fair Value, Inputs, Level 1 [Member]    
Fair value of liabilities
Fair Value, Inputs, Level 1 [Member] | Stock Purchase Warrants [Member]    
Liability classified stock purchase warrants
Fair Value, Inputs, Level 2 [Member]    
Fair value of liabilities
Fair Value, Inputs, Level 2 [Member] | Stock Purchase Warrants [Member]    
Liability classified stock purchase warrants
Fair Value, Inputs, Level 3 [Member]    
Fair value of liabilities 3,852,882 583,734
Fair Value, Inputs, Level 3 [Member] | Stock Purchase Warrants [Member]    
Liability classified stock purchase warrants $ 3,852,882 $ 583,734