Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Note 16 - Income Taxes - Provision for Income Taxes (Details)

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Note 16 - Income Taxes - Provision for Income Taxes (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]      
Loss before income taxes $ (11,661) $ (14,240) $ (11,711)
Statutory Canadian corporate tax rate 26.50% 26.50% 26.50%
Anticipated tax recovery $ (3,090) $ (3,773) $ (3,103)
Non-deductible permanent differences 220 412 604
Change in deferred tax benefits deemed not probable to be recovered 4,502 3,434 2,606
Change in substantively enacted rates 51
Foreign exchange differences (1,391)
Other $ (292) $ (73) $ (107)