Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of Income Tax (Recovery) Expense

Income tax (recovery) expense varies from the amounts that would be computed by applying the expected Canadian and provincial statutory income tax rate of 27% (2017 – 27% ) to loss before income taxes as shown in the following table:

	2018			2017
Computed recoveries at Canadian federal and provincial tax rates	$	(9,273	)	$	(8,000	)
Change in valuation allowance		10,472			9,210
Investment tax credits earned		(1,567	)		(1,393	)
Tax attributes expired/utilized		911			683
Non-deductible expenditures		(473	)		594
Effect of tax rate increases		—			(1,444	)
Other		(70	)		350
Income tax (recovery) expense	$	—		$	—

Schedule of Net Deferred Income Tax Assets

The significant components of the Company’s net deferred income tax assets are as follows:

	2018			2017
Deferred income tax assets
Scientific research and experimental development pool	$	26,572		$	25,056
Investment tax credits		23,808			22,872
Non-capital losses		22,035			13,645
Depreciable assets		5,710			5,360
Deferred financing fees		1,303			578
Other		98			114
Less - valuation allowance		(79,526	)		(67,625	)
Net deferred income tax assets	$	—		$	—