Commitments and Contingencies (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Long-term Purchase Commitment [Line Items]
Rent expense		$ 800,000	$ 1,300,000	$ 2,500,000	$ 3,000,000
Lease term	120 months
Recorded assets		81,308,000		81,308,000		74,390,000
Lease financing obligation		43,900,000		43,900,000		44,000,000
Lease financing obligation, current		1,100,000		1,100,000
Lease financing obligations, non-current		42,831,000		42,831,000		43,152,000
Contract manufacturer liability		900,000		900,000		1,800,000
Deposits and other assets
Long-term Purchase Commitment [Line Items]
Restricted deposits		2,300,000		2,300,000		2,300,000
Line of Credit | Letter of Credit
Long-term Purchase Commitment [Line Items]
Letter of credit		4,000,000		4,000,000
Building and improvements
Long-term Purchase Commitment [Line Items]
Recorded assets		53,400,000		53,400,000		53,300,000
Building
Long-term Purchase Commitment [Line Items]
Recorded assets		$ 35,154,000		$ 35,154,000		$ 35,154,000
Estimated useful life				30 years