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SHARE CAPITAL, WARRANTS AND OPTIONS - Common shares issued and outstanding (Details) |  |  |  |  |  |  | 12 Months Ended |
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Aug. 15, 2017 CAD ($) EquityInstruments $ / shares shares | Jun. 08, 2017 CAD ($) EquityInstruments Y $ / shares shares | Sep. 12, 2016 CAD ($) EquityInstruments $ / shares shares | Jul. 21, 2016 CAD ($) EquityInstruments $ / shares shares | Apr. 28, 2016 CAD ($) shares | Jul. 20, 2015 CAD ($) EquityInstruments $ / shares shares | Dec. 31, 2016 CAD ($) EquityInstruments | Dec. 31, 2015 CAD ($) EquityInstruments $ / shares shares | Dec. 31, 2017 EquityInstruments $ / shares shares
Issue of equity |  |  |  |  |  |  |  |  |
Par value per share | $ / shares |  |  |  |  |  |  |  |  | $ 0
Number of warrants issued | EquityInstruments |  |  |  |  |  |  | 81,203,692 | 14,778,344 | 94,971,721
Direct financing costs |  |  |  |  |  |  | $ 95,000 |  |
Proceeds from exercise of stock options |  |  |  |  |  |  |  | $ 115,000 |
Reallocated from share-based payments |  |  |  |  |  |  |  | $ 115,000 |
Weighted average exercise price of warrants exercised | $ / shares |  |  |  |  |  |  |  | $ 0.21 |
Proceeds from exercise of warrants |  |  |  |  |  |  |  | $ 1,567,000 |
Common shares issued as finance fee |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Number of units issued | shares |  |  |  |  | 952,380 |  |  |  |
Fair value of finance fee |  |  |  |  | $ 95,000 |  |  |  |
Common shares issued for stock options exercised |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Number of units issued | shares |  |  |  |  |  |  |  | 1,149,000 |
Stock options exercised |  |  |  |  |  |  |  | $ 0.10 |
Proceeds from exercise of stock options |  |  |  |  |  |  |  | 115,000 |
Common shares issued for stock options exercised | Reserve of share-based payments |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Reallocated from share-based payments |  |  |  |  |  |  |  | $ (57,000) |
Common shares issued for warrants exercised |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Number of units issued | shares |  |  |  |  |  |  |  | 7,461,748 |
Weighted average exercise price of warrants exercised | $ / shares |  |  |  |  |  |  |  | $ 0.21 |
Proceeds from exercise of warrants |  |  |  |  |  |  |  | $ 1,567,000 |
Preferred |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Authorized capital | shares |  |  |  |  |  |  |  |  | 100,000,000
Common | Brokered private placement |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Total gross proceeds |  | $ 10,877,000 | $ 5,050,000 | $ 6,950,000 |  | $ 6,392,000 |  |  |
Number of units issued | shares |  | 145,030,833 | 67,331,093 | 92,668,907 |  | 29,054,079 |  |  |
Price of unit issued | $ / shares |  | $ 0.075 | $ 0.075 | $ 0.075 |  | $ 0.22 |  |  |
Number of common shares in unit | shares |  | 1 | 1 | 1 |  | 1 |  |  |
Number of common share purchase warrants in unit | EquityInstruments |  | 0.5 | 0.5 | 0.5 |  | 0.5 |  |  |
Number of common shares to be acquired through exercise of warrant | shares |  | 1 |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  | $ 0.12 | $ 0.12 | $ 0.12 |  | $ 0.30 |  |  |
Payments for share issuance costs |  | $ 533,000 |  | $ 571,000 |  | $ 216,000 |  |  |
Fair value of warrants issued |  | $ 1,500,000 |  |  |  |  |  |  |
Expected warrant life |  | 2 years |  |  |  |  |  |  |
Expected dividend yield |  | 0.00% |  |  |  |  |  |  |
Risk free interest rate |  | 0.71% |  |  |  |  |  |  |
Expected volatility |  | 98.60% |  |  |  |  |  |  |
Common | Agent's warrants |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  | $ 0.075 |  | $ 0.075 |  | $ 0.30 |  |  |
Number of warrants issued | EquityInstruments |  | 1,965,093 |  | 1,203,695 |  | 251,370 |  |  |
Fair value of warrants issued |  | $ 61,000 |  | $ 48,000 |  | $ 18,000 |  |  |
Expected warrant life |  |  |  | 2 years |  | 2 years |  |  |
Expected dividend yield |  |  |  | 0.00% |  | 0.00% |  |  |
Risk free interest rate |  |  |  | 0.57% |  | 0.42% |  |  |
Expected volatility |  |  |  | 91.06% |  | 89.61% |  |  |
Common | Overallotment Option |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Period of options granted |  | 30 days |  |  |  |  |  |  |
Fair value of options granted |  | $ 39,000 |  |  |  |  |  |  |
Option, expected life | Y |  | 30 |  |  |  |  |  |  |
Option, expected dividend yield |  | 0.00% |  |  |  |  |  |  |
Option, risk-free interest rate |  | 0.71% |  |  |  |  |  |  |
Option, expected volatility |  | 66.60% |  |  |  |  |  |  |
Common | Non-brokered private placement |  |  |  |  |  |  |  |  |
Issue of equity |  |  |  |  |  |  |  |  |
Total gross proceeds | $ 3,074,000 |  |  |  |  |  |  |  |
Number of units issued | shares | 40,982,448 |  |  |  |  |  |  |  |
Price of unit issued | $ / shares | $ 0.075 |  |  |  |  |  |  |  |
Number of common shares in unit | shares | 1 |  |  |  |  |  |  |  |
Number of common share purchase warrants in unit | EquityInstruments | 0.5 |  |  |  |  |  |  |  |
Number of common shares to be acquired through exercise of warrant | shares | 1 |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares | $ 0.12 |  |  |  |  |  |  |  |
Fair value of warrants issued | $ 519,000 |  |  |  |  |  |  |  |
Expected warrant life | 2 years |  |  |  |  |  |  |  |
Expected dividend yield | 0.00% |  |  |  |  |  |  |  |
Risk free interest rate | 1.23% |  |  |  |  |  |  |  |
Expected volatility | 98.64% |  |  |  |  |  |  |  |
Direct financing costs | $ 16,000 |  |  |  |  |  |  |  |
Net proceeds from issuance | $ 3,058,000 |  |  |  |  |  |  |  |

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