Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Net Loss Per Share - Schedule of Antidilutive Shares Excluded from Computation of Net Loss Per Share (Details)

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Note 11 - Net Loss Per Share - Schedule of Antidilutive Shares Excluded from Computation of Net Loss Per Share (Details) - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Employee and Non-employee Stock Options [Member]        
Employee and non-employee stock options (in shares) 1,249,559 627,484 1,249,559 627,484
Warrant [Member]        
Employee and non-employee stock options (in shares) 807,563 831,251 807,563 831,251
Deferred Share Units [Member]        
Employee and non-employee stock options (in shares) 21,183 21,183 21,183 21,183