Note 10 - Accumulated Other Comprehensive Loss (Details Textual) $ in Thousands, CAD in Billions, AUD in Billions	Jun. 30, 2016 CAD	Jun. 30, 2016 AUD	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax			$ 16,900
Accumulated Other Comprehensive Income (Loss), Net of Tax			$ (349,437)	$ (366,309)
Translation Adjustment Functional to Reporting Currency, Net of Tax	CAD 0.2	AUD 0.5