Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Stock Options Activity (Details)

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Note 7 - Stock Options Activity (Details) - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue $ 1.46 $ 0.92
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 8 years 328 days 9 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 61,500  
Granted at market price (in dollars per share) $ 8.16  
Outstanding at June 30, 2015 (in shares) 376,275  
Outstanding at June 30, 2015 (in dollars per share) $ 3.20  
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue $ 1.46 $ 0.92
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 8 years 328 days 9 years 73 days
Exercisable at June 30, 2015 (in shares) 90,377  
Exercisable at June 30, 2015 (in dollars per share) $ 1.91  
Exercisable at June 30, 2015 (in dollars per share) $ 0.86  
Exercisable at June 30, 2015 8 years 255 days