Share Capital - RSU and Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Number of Outstanding Options
Beginning Balance (in shares)	13,790,220
Granted (in shares)	5,076,260
Exercised (in shares)	(240,000)
Forfeited (in shares)	(1,344,961)
Expired (in shares)	(4,323,143)
Ending Balance (in shares)	12,958,376
Weighted Average Exercise Price $/Option
Weighted Average Exercise Price $/Option, beginning balance (in dollars per share) | $ / shares	$ 5.93
Weighted Average Exercise Price $/Option, Granted (in dollars per share) | $ / shares	3.11
Weighted Average Exercise Price $/Options, Exercised (in dollars per share) | $ / shares	2.51
Weighted Average Exercise Price $/Options, Forfeited (in dollars per share) | $ / shares	(5.66)
Weighted Average Exercise Price $/Options, Expired (in dollars per share) | $ / shares	(6.85)
Weighted Average Exercise Price $/Option, ending balance (in dollars per share) | $ / shares	$ 4.61
RSUs [Member]
Number of Outstanding Share Units
Beginning Balance (in shares)	1,236,963
Granted (in shares)	1,041,450
Exercised (in shares)	(519,111)
Forfeited (in shares)	(708,242)
Expired (in shares)	0
Ending Balance (in shares)	1,051,060