Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Fair Value Measurements - Activity for Items Measured at Fair Value on a Recurring Basis (Details)

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Note 3 - Fair Value Measurements - Activity for Items Measured at Fair Value on a Recurring Basis (Details) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Balance  
Issuance of warrants   4,582,170
Change in fair value - loss   (757,275)
Balance   $ 3,824,895
Stock Purchase Warrants [Member]    
Balance $ 3,921,917  
Exercise of warrants (3,737,434)  
Change in fair value - loss 3,082,925  
Balance $ 3,267,408