Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Equity - Stock Options Activity (Details)

v3.8.0.1
Note 8 - Equity - Stock Options Activity (Details) - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Granted at Market Price, Number of Shares (in shares) 195,286  
Employee Stock Option [Member]    
Outstanding, Number of Shares (in shares) 953,075  
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 3.66  
Outstanding, Weighted Average Fair Value (in dollars per share) $ 1.76 $ 1.86
Outstanding, Weighted Average Remaining Contractual Life (Year) 7 years 146 days 6 years 328 days
Granted at Market Price, Number of Shares (in shares) 195,286  
Granted at Market Price, Weighted Average Exercise Price (in dollars per share) $ 3.70  
Exercised, Number of Shares (in shares) (106,221)  
Exercised, Weighted Average Exercise Price (in dollars per share) $ 1.20  
Cancelled, Number of Shares (in shares) (30,454)  
Cancelled, Weighted Average Exercise Price (in dollars per share) $ 5.21  
Outstanding, Number of Shares (in shares) 1,011,686 953,075
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 3.87 $ 3.66
Exercisable, Number of Shares (in shares) 370,634  
Exercisable, Weighted Average Exercise Price (in dollars per share) $ 4.67  
Exercisable, Weighted Average Fair Value (in dollars per share) $ 2.17  
Exercisable, Weighted Average Remaining Contractual Life (Year) 5 years 219 days