Schedule II - Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Receivables Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ (998)	$ (3,587)	$ (1,046)
Charges for Amount Reserved	(541)		$ (2,541)
Deductions for Amounts Recovered	400	$ 1,500
Deductions for Amounts Written Off	545	1,089
Balance at End of Period	(594)	$ (998)	$ (3,587)
Reserve For Product Returns [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	(66)		$ (123)
Charges for Amount Reserved	$ (134)	$ (66)
Deductions for Amounts Recovered			$ 123
Deductions for Amounts Paid	$ 66
Balance at End of Period	$ (134)	$ (66)
Reserve For Product Returns [Member] | General And Administrative [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Charges for Amount Reserved			$ (2,500)