Other Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Other Accrued Liabilities [Abstract]
Accrued warranty, current, see Note 1	$ 755	$ 1,071	$ 1,094
Accrued taxes, net	1,812		1,023
Accrued sales return	7,061	8,433
Insurance liability reserves, current	803		0
Accrued enhancement expenses, current	900		0
Other accrued liabilities	5,249		3,869
Total other accrued liabilities	16,580		22,032
Sales returns liability roll forward [Abstract]
Balance at beginning of year	16,046	11,901
Additions that reduce net sales	28,321	29,246
Deductions from reserves	(37,306)	(32,714)
Balance at end of period	$ 7,061	$ 8,433