| 2017 | 2016 | 2015 | ||||||||
| Deferred tax assets | ||||||||||
| Non-capital losses | $ | 6,401,000 | $ | 4,703,000 | $ | 3,741,000 | ||||
| Equipment and other | 223,000 | 78,000 | 76,000 | |||||||
| Temporary differences relating to intellectual property costs | - | 136,000 | 136,000 | |||||||
| Foreign tax credit | 412,000 | 412,000 | 412,000 | |||||||
| Un-deducted SR&ED expenditure pool | 412,000 | 320,000 | 320,000 | |||||||
| Investment tax credit | 196,000 | 161,000 | 239,000 | |||||||
| Share issuance costs | 156,000 | 113,000 | 100,000 | |||||||
| Unrecognized deferred tax assets | (7,800,000 | ) | (5,923,000 | ) | (5,024,000 | ) | ||||
| $ | - | $ | - | $ | - |