Commitments and Contingencies (Narrative) (Details) $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 12, 2013 USD ($) ft² facility option	Dec. 31, 2014 lease	Sep. 30, 2015 USD ($) letters_of_credit	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) letters_of_credit	Sep. 30, 2014 USD ($)
Operating Leased Assets [Line Items]
Rent expense | $			$ 0.6	$ 0.7	$ 1.8	$ 2.1
Number of facilities | facility	2
Aggregate square feet	129,000
Term of contract	15 years
Number of renewal options | option	1
Renewal term	5 years
Initial base rent | $	$ 1.9
Landlord-funded improvements | $	$ 6.8
Number of letters of credit | letters_of_credit			2		2
Number of leases exited | lease		1
Operating Leases, Future Minimum Payments Due, Base Rent Increases [Abstract]
2015	3.00%
2016	3.00%
2017	3.00%
2018	3.00%
2019	3.00%
2021 and thereafter	4.00%
Manufacturing Facility
Operating Leased Assets [Line Items]
Aggregate square feet	57,000
Building
Operating Leased Assets [Line Items]
Aggregate square feet	2,900