Schedule II - Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Receivables Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ (3,587)	$ (1,046)
Charges for Amount Reserved		(2,541)	[1]	(1,046)	[2]
Deductions for Amounts Recovered	1,500
Deductions for Amounts Written Off	1,089
Balance at End of Period	(998)	(3,587)		(1,046)
Reserve For Product Returns [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		(123)		(116)
Charges for Amount Reserved	(66)			(58)
Deductions for Amounts Recovered		123		51
Deductions for Amounts Written Off
Balance at End of Period	(66)			(123)
Reserve For Product Returns [Member] | General And Administrative [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Charges for Amount Reserved		(2,500)
Reserve For Product Returns [Member] | Product Revenue [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Charges for Amount Reserved		$ (1,000)

[1] For the year ended December 31, 2013, the charges for amounts reserved included $2.5 million of general and administrative expense related to bad debt that was uncertain of collection.

[2] For the year ended December 31, 2012, the charges for amounts reserved included $1.0 million recorded as a reduction in product revenue relating to price concessions that were recorded to the accounts receivable reserve.