Quarterly report pursuant to Section 13 or 15(d)

Note 15 - Common stock warrants (Details)

v3.8.0.1
Note 15 - Common stock warrants (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2017
shares
Dec. 31, 2017
USD ($)
$ / shares
Details      
Warrants issued, Average Contractual Life in Years 20.3   20.5
Weighted Average outstanding warrant exercise price | $ / shares $ 2.11   $ 2.11
Warrants exercised in period, Total 379,436 1,359,218  
Warrants issued in period, Total 0 0  
Warrants issued in period, Intrinsic Value | $ $ 79,585   $ 0