Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Net Revenues by Segment

	Years Ended December 31,
Net Revenues by Segment (in thousands):
	2012		2011		2010
Net revenues:
Standard products	$	240,389	$	249,743	$	289,347
Other products	9,723		9,282		8,019
Total net revenues	$	250,112	$	259,025	$	297,366

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

Geographic Information (in thousands):
	Years Ended December 31,
	2012				2011				2010
	Total Net Revenues		Long-Lived Assets (1)		Total Net Revenues		Long-Lived Assets(1)		Total Net Revenues		Long-Lived Assets (1)
United States of America	$	66,267	$	51,715	$	71,700	$	53,368	$	78,673	$	58,458
Other North American Countries	193		—		842		—		2,570		—
Korea	36,896		24		40,155		39		37,277		31
Taiwan	22,507		3,492		23,938		2,153		25,741		1,545
Singapore	23,899		8		21,883		5		30,644		6
China	16,183		1,417		19,079		1,333		22,845		1,800
Hong Kong	37,300		215		26,429		163		39,262		19
Japan	14,329		1		17,392		5		20,498		10
Other Asian Countries	1,284		3,717		1,629		3,716		1,590		2,548
Europe	31,254		103		35,978		102		38,266		100
Total	$	250,112	$	60,692	$	259,025	$	60,884	$	297,366	$	64,517

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(1) Long-lived assets consist of property, plant and equipment.