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RISK AND CAPITAL MANAGEMENT: FINANCIAL INSTRUMENTS - Disclosure of detailed information about currency risk (Details) $ in Thousands, $ in Thousands | Dec. 31, 2020 CAD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CAD ($) | Dec. 31, 2018 CAD ($)
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Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents | $ 52,418 |  | $ 68,994 | $ 86,175
Restricted cash | 196 |  | 187 |
Trade receivables | 2,876 |  | 981 |
Accounts payable and accrued liabilities | (3,618) |  | (1,328) |
Advances from joint venture partners | (1,565) |  | $ (2,404) |
Currency Risk [Member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Cash and cash equivalents |  | $ 36,490 |  |
Restricted cash |  | 1,041 |  |
Trade receivables |  | 288 |  |
Accounts payable and accrued liabilities |  | (325) |  |
Advances from joint venture partners |  | (1,197) |  |
Net exposure | $ 46,246 | $ 36,297 |  |

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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B13 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_i&doctype=Standard -URIDate 2019-03-27 + Details
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