Commitment and Contingencies Commitment and Contingencies - Contractual Obligations (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Purchase Obligation, Fiscal Year Maturity [Abstract]
Total	$ 4,154
2014 (Remaining 6 Months)	4,154
2015	0
2016	0
2017	0
2018	0
Thereafter	0
Contractual Obligation, Fiscal Year Maturity [Abstract]
Total	1,235	[1]
2014 (Remaining 6 Months)	145	[1]
2015	100	[1]
2016	100	[1]
2017	100	[1]
2018	100	[1]
Thereafter	690	[1]
Purchase and Contractual Obligations, Fiscal Year Maturity [Abstract]
Total	5,389
2014 (Remaining 6 Months)	4,299
2015	100
2016	100
2017	100
2018	100
Thereafter	$ 690

[1] Excludes future obligations pursuant to the cost-sharing arrangement under the Company's License Agreement with Roche. Amounts of such obligations, if any, cannot be determined at this time.