Note 12 - Net Loss Per Share - Schedule of Antidilutive Shares Excluded from Computation of Net Loss Per Share (Details) - shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Employee and Non-employee Stock Options [Member] | ||||
| Antidilutive Securities (in shares) | 1,251,893 | 639,360 | 1,251,893 | 639,360 |
| Warrant [Member] | ||||
| Antidilutive Securities (in shares) | 807,563 | 825,264 | 807,563 | 825,264 |
| Deferred Share Units [Member] | ||||
| Antidilutive Securities (in shares) | 21,183 | 21,183 | 21,183 | 21,183 |