Valuations and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 760		$ 812		$ 1,294
Allowance Additions or (Reductions)	66,614		79,057		75,116
Returns and Price Adjustments	(66,286)		(79,109)		(75,598)
Bad Debt Write-offs	(30)		0		0
Balance at End of Year	1,058		760		812
OEM and Stocking Representative Returns and Price Adjustments [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	737		712		1,066
Allowance Additions or (Reductions)	1,970		1,954		1,452
Returns and Price Adjustments	(1,889)		(1,929)		(1,806)
Bad Debt Write-offs	0		0		0
Balance at End of Year	818		737		712
Unclaimed Distributor Price Adjustments [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	0	[1]	51	[1]	169	[1]
Allowance Additions or (Reductions)	64,530	[1]	77,129	[1]	73,674	[1]
Returns and Price Adjustments	(64,397)	[1]	(77,180)	[1]	(73,792)	[1]
Bad Debt Write-offs	0	[1]	0	[1]	0	[1]
Balance at End of Year	133	[1]	0	[1]	51	[1]
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	23		49		59
Allowance Additions or (Reductions)	114		(26)		(10)
Returns and Price Adjustments	0		0		0
Bad Debt Write-offs	(30)		0		0
Balance at End of Year	$ 107		$ 23		$ 49

[1] The Company estimates and records an allowance for sell-through distributor price adjustments for which the specific resale transaction has been completed, but the price adjustment claim has not yet been received from the sell-through distributor. This allowance typically represents approximately one to three weeks of unclaimed price adjustments.