Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

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 26% (2015 - 26%, 2014 - 26%) to loss before income taxes as shown in the following table:

	2016			2015			2014
Computed taxes (recoveries) at Canadian federal and provincial tax rates	$	(5,980	)	$	(4,095	)	$	3,385
Change in valuation allowance		6,897			2,482			(2,364	)
Investment tax credits earned		(1,500	)		(1,220	)		(1,283	)
Tax attributes expired/utilized		617			2,851			2,011
Non-deductible expenditures		569			977			(1,053	)
Financing fees in equity		(531	)		—			(1,945	)
Other		(72	)		(995	)		1,249
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:

	2016			2015
Deferred income tax assets
Scientific research and experimental development pool	$	22,823		$	21,088
Investment tax credits		22,483			21,303
Non-capital losses		7,800			4,234
Depreciable assets		4,163			3,749
Deferred financing fees		1,020			959
Other		126			185
Less - valuation allowance		(58,415	)		(51,518	)
Net deferred income tax assets	$	—		$	—