Share Capital - Non-vested Liability Stock Option Activity (Details)	12 Months Ended
	Dec. 31, 2016 CAD / shares shares	Dec. 31, 2016 $ / shares shares	Dec. 31, 2016 CAD / shares shares	Dec. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Non-vested, beginning balance (in shares)	1,351,541	1,351,541
Options vested (in shares)	(472,479)	(472,479)
Non-vested options forfeited (in shares)	(322,698)	(322,698)
Non-vested, ending balance (in shares)	2,211,963	2,211,963	2,211,963	2,211,963
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested, beginning balance, weighted average fair value (in CAD and USD per share) | (per share)	CAD 15.69	$ 11.34
Options vested (in CAD and USD per share) | (per share)	14.20	10.72
Non-vested options forfeited (in CAD and USD per share) | (per share)	9.70	7.33
Non-vested, ending balance, weighted average fair value (in CAD and USD per share) | (per share)	CAD 7.17	$ 5.34	CAD 7.17	$ 5.34
Liability classified stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Non-vested, beginning balance (in shares)			134,000	134,000
Options vested (in shares)			(93,250)	(93,250)
Non-vested options forfeited (in shares)			(26,000)	(26,000)
Non-vested, ending balance (in shares)	14,750	14,750	14,750	14,750
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested, beginning balance, weighted average fair value (in CAD and USD per share) | $ / shares				$ 3.61
Options vested (in CAD and USD per share) | $ / shares				0.67
Non-vested options forfeited (in CAD and USD per share) | $ / shares				0.04
Non-vested, ending balance, weighted average fair value (in CAD and USD per share) | $ / shares		$ 0.92		$ 0.92