Other Financial Information (Property and Equipment, Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment	$ 23,671	$ 18,610
Less accumulated depreciation and amortization	9,420	7,154
Property and equipment, net	14,251	11,456
Depreciation and amortization	2,600	1,700	1,600
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	2,328	5,248
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	11,951	8,035
Equipment acquired under capital lease	600
Accumulated depreciation	200
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	8,192	4,629
Computer Software And Hardware [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,200	$ 698