Note 21 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Operating Segment Net Sales And Operating Income (Loss) [Table Text Block]

	Years Ended December 31
	2012			2011			2010
Net sales
Integrated Circuit Group	$	97,666		$	124,283		$	137,789
Network Security Group		825			202			1,946
	$	98,491		$	124,485		$	139,735
Income (loss) from operations
Integrated Circuit Group	$	(27,970	)	$	7,104		$	22,442
Network Security Group		767			(88	)		(9,591	)
	$	(27,203	)	$	7,016		$	12,851

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Years Ended December 31
	2012		2011		2010
China	$	78,709	$	99,491	$	105,170
Korea		7,965		11,521		14,623
Japan		6,502		7,190		11,131
Taiwan		2,271		1,532		3,854
Other		3,044		4,751		4,957
	$	98,491	$	124,485	$	139,735

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	Years Ended December 31
	2012			2011			2010
Customer A		9.6	%		13.8	%		18.9	%

Unrealized Gain (Loss) on Investments [Table Text Block]

	December 31
	2012		2011		2010
Taiwan	$	11,608	$	12,158	$	11,815
China		9,500		11,126		12,991
U.S.A.		4,718		4,713		4,599
Singapore		155		210		213
Other		161		123		121
	$	26,142	$	28,330	$	29,739