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Income taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Taxes Tables Abstract

Schedule of provision for income taxes

		2019				2018				2017

Current tax expense			-				-				-
Deferred tax expense			-				-				-
Provision for income taxes			-				-				-

Schedule of statutory income tax rates

		2019				2018				2017
Canadian federal and provincial recovery of income taxes using statutory rate of 27% (2018 – 27%, 2017 -27%)			(2,653	)			(5,946	)			(5,381	)
Change in unrecognized deductible temporary differences and unused tax losses			4,534				6,098				4,397
Permanent differences and other			(1,881	)			(152	)			984
Provision for income taxes			-				-				-

Schedule of deferred tax assets

		2019				2018
Unused tax losses			37				141

Schedule of deferred tax liabilities

		2019				2018
Convertible debentures			-				67
Deferred cost			37				74
			37				141

Deductible temporary differences deferred tax assets

		2019				2018
Property and equipment			2,103				2,250
Right-of-use assets, net lease liability			388				-
Intangible assets			3,205				4,368
Debentures			595				1,658
Convertible debentures			530				-
Financing costs			1,509				2,390
Research and development expenditures			1,437				1,163
Other			-				21
			9,767				11,850

Deductible temporary unused tax losses

		2019				2018
Expires 2024			610				610
Expires 2025			1,101				1,075
Expires 2026			2,136				2,136
Expires 2027			5,203				5,203
Expires 2028			2,064				2,064
Expires 2029			4,679				4,663
Expires 2030			3,698				3,698
Expires 2031			1,614				1,614
Expires 2032			4,854				4,849
Expires 2033			11,006				10,454
Expires 2034			8,420				7,416
Expires 2035			11,168				9,835
Expires 2036			18,886				19,008
Expires 2037			20,449				19,824
Expires 2038			20,214				16,277
Expires 2039			14,557				-
			130,659				108,726