Income taxes and mining tax credits - Disclosure of detailed information about tax pools available (Details)	Dec. 31, 2019 CAD ($)
Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	$ 16,649,369
Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	14,091,553
Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	4,088,060
Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	654,183
2025 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2025 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	0
2025 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2025 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	24,847
2026 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2026 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	1,175
2026 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2026 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2027 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2027 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	1,381,861
2027 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2027 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	91,030
2028 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2028 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	2,559,941
2028 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2028 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	57,677
2029 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2029 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	2,621,029
2029 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2029 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	234,667
2030 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2030 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	2,388,895
2030 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2030 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	245,962
2031 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2031 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	1,392,745
2031 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2031 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2032 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2032 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	818,329
2032 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2032 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2033 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2033 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	202,411
2033 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2033 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2034 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2034 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	266,149
2034 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2034 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2035 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2035 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	173,814
2035 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2035 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2036 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2036 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	152,243
2036 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2036 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2037 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2037 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	307,139
2037 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2037 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2038 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2038 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	0
2038 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2038 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
2039 [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2039 [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	1,825,822
2039 [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	0
2039 [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	0
No expiry [Member] | Canadian resource pools [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	16,649,369
No expiry [Member] | Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	0
No expiry [Member] | Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	4,088,060
No expiry [Member] | Canadian federal investment tax credit losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	$ 0