|
Note 15 - Income taxes (Details) - Summary of Significant Components of Deferred Tax Assets (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Summary of Significant Components of Deferred Tax Assets [Abstract] | ||
| Net operating loss carryforwards (non-capital losses) | $ 24,617 | $ 17,974 |
| Scientific research and development | 2,294 | 2,494 |
| Tax credits | 4,151 | 3,646 |
| Stock based compensation | 1,148 | 602 |
| Other, net | 367 | 863 |
| Share issue costs | 1,162 | 1,728 |
| Total deferred tax assets, net, before valuation allowance | 33,739 | 27,307 |
| Valuation allowance | (33,739) | (27,307) |
| Net deferred tax assets | $ 0 | $ 0 |