Other Accrued Liabilities (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Other Accrued Liabilities [Abstract]
Accrued warranty, current, see Note 1		$ 380		$ 529
Accrued taxes, net		1,476		1,105
Accrued sales returns	[1]	4,359		7,651
Other accrued liabilities		3,428		3,333
Total other accrued liabilities		9,643		$ 12,618
Sales returns liability roll forward [Abstract]
Balance at beginning of year		7,651	$ 16,046
Additions that reduce net sales		10,510	18,636
Deductions from reserves		(13,802)	(28,135)
Balance at end of period		$ 4,359	$ 6,547

[1] The activity in the accrued sales returns liability account was as follows: Six Months Ended June 30, 2015 2014 (unaudited) (unaudited) Balance at beginning of year $ 7,651 $ 16,046 Additions that reduce net sales 10,510 18,636 Deductions from reserves (13,802) (28,135) Balance at end of period $4,359 $6,547