| 7. | INCOME TAXES |
| | | December 31, 2017 | | December 31, 2016 | | ||
| Loss before income taxes | | $ | (6,432,057) | | $ | (7,190,628) | |
| Statutory Canadian corporate tax rate | | | 26.00 | % | | 25.00 | % |
| | | | | | | | |
| Expected income tax (recovery) | | $ | (1,672,335) | | $ | (1,797,657) | |
| Share-based payments | | | 115,324 | | | 27,132 | |
| Difference in tax rates in other jurisdictions | | | (805,662) | | | (1,073,449) | |
| Effect of change in tax rate | | | 26,455,632 | | | - | |
| Derecognition of derivative liability | | | (1,824,065) | | | - | |
| Share issue cost | | | (14,540) | | | 173,684 | |
| Adjustment to prior years provision versus statutory tax returns | | | (1,509,364) | | | - | |
| Expiry of donations | | | 64,554 | | | - | |
| Expiry of losses | | | 20,280 | | | - | |
| Change in unrecognized deductible temporary differences | | | (20,829,824) | | | 2,670,290 | |
| Total income tax expense (recovery) | | $ | - | | $ | - | |
| | | December 31, 2017 | | December 31, 2016 | | ||
| Deferred income tax assets (liabilities): | | | | | | | |
| Mineral properties | | $ | 23,391,666 | | $ | 57,243,323 | |
| Derivative liability | | | - | | | (1,824,065) | |
| Donations | | | - | | | 92,160 | |
| Property and equipment | | | 6,448 | | | 9,828 | |
| Share issue costs | | | 36,483 | | | 31,830 | |
| Marketable securities | | | 54,073 | | | 45,754 | |
| Losses available for future periods | | | 47,278,286 | | | 35,997,950 | |
| | | | 70,766,956 | | | 91,596,780 | |
| Valuation allowance | | | (70,766,956) | | | (91,596,780) | |
| Net deferred tax asset | | $ | - | | $ | - | |
| | | Canada | | United States | | ||
| | | | | | | | |
| 2037 | | $ | 1,394,000 | | $ | 8,892,000 | |
| 2036 | | | 1,383,000 | | | 8,798,000 | |
| 2035 | | | 406,000 | | | 10,703,000 | |
| 2034 | | | 1,694,000 | | | 12,587,000 | |
| 2033 | | | 1,827,000 | | | 14,208,000 | |
| 2032 | | | 2,629,000 | | | 16,798,000 | |
| 2031 | | | 4,180,000 | | | 40,825,000 | |
| 2030 | | | 2,829,000 | | | 18,765,000 | |
| 2029 | | | 2,074,000 | | | 2,973,000 | |
| 2028 | | | 1,253,000 | | | 1,412,000 | |
| 2027 | | | 907,000 | | | 1,284,000 | |
| | | | 20,576,000 | | | 137,245,000 | |