Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Equity - Stock Options Activity (Details)

v3.7.0.1
Note 7 - Equity - Stock Options Activity (Details) - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Granted at Market Price, Number of Shares (in shares) 40,000  
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) $ 1.78 $ 1.86
Outstanding, Weighted Average Remaining Contractual Life (Year) 7 years 6 years 328 days
Granted at Market Price, Number of Shares (in shares) 40,000  
Granted at Market Price, Weighted Average Exercise Price (in dollars per share) $ 3  
Exercised, Number of Shares (in shares) (59,142)  
Exercised, Weighted Average Exercise Price (in dollars per share) $ 1.20  
Cancelled, Number of Shares (in shares) (17,018)  
Cancelled, Weighted Average Exercise Price (in dollars per share) $ 5.10  
Outstanding, Number of Shares (in shares) 916,915 953,075
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 3.76 $ 3.66
Exercisable, Number of Shares (in shares) 345,855  
Exercisable, Weighted Average Exercise Price (in dollars per share) $ 4.59  
Exercisable, Weighted Average Fair Value (in dollars per share) $ 2.24  
Exercisable, Weighted Average Remaining Contractual Life (Year) 4 years 146 days