Stock Option Plans (Details) - $ / shares		6 Months Ended
	Jun. 21, 2016	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares, new shares issued (in shares)	7,322,176
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for future issuance (in shares)		10,000,000
Common shares, new shares issued (in shares)		3,812
Reduction ratio in shares available for grant		2
Options and Restricted Stock Available for Grant [Rollforward]
Beginning of the period (in shares)		5,257,000
Options granted (in shares)		(1,541,000)
RSUs granted (in shares)		(208,000)
Options exercised (in shares)		0
Options forfeited/cancelled (in shares)		207,000
End of the period (in shares)		3,715,000
Number of Options and Restricted Stock Outstanding [Rollforward]
Outstanding, beginning of the period (in shares)		5,194,000
Options granted (in shares)		1,541,000
RSUs granted (in shares)		100,000
Options exercised (in shares)		0
Options forfeited/cancelled (in shares)		(420,000)
Outstanding, end of the period (in shares)		6,415,000
Weighted Average Exercise Price [Rollforward]
Outstanding, beginning of the period (in dollars per share)		$ 3.93
Options granted (in dollars per share)		2.87
RSUs granted (in dollars per share)		0
Options exercised (in dollars per share)		0
Options forfeited/cancelled (in dollars per share)		4.52
Outstanding end of the period (in dollars per share)		$ 3.63
Weighted-average assumptions [Abstract]
Expected life		6 years 25 days	6 years 14 days
Risk-free interest rates		1.45%	1.76%
Volatility		61.78%	67.02%
Dividend yield		0.00%	0.00%