Note 9 - Long-term Investments (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule Of Long-Term Investments [Table Text Block]

	December 31
	2016		2015
Cost method
Sigurd Microelectronics (Cayman) Co., Ltd. (“Sigurd Cayman”)	$	2,365	$	2,365
X-FAB Silicon Foundries SE (“X-FAB”)		-		4,968
Philip Ventures Enterprise Fund (“PVEF”)		44		49
GEM Services, Inc. (“GEM”)		-		78
Excelliance MOS Co., Ltd (“EMC”)		1,844		1,844
Verticil Electronics Corp. (“Verticil”)		-		-
Asia Sinomos Semiconductor Inc. (“Sinomos”)		-		-
Silicon Genesis Corporation (“SiGen”)		-		-
		4,253		9,304
Available-for-sale securities – noncurrent
Etrend Hightech Corp. (“Etrend”)		-		-
	$	4,253	$	9,304

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

	Years Ended December 31
	2016			2015		2014
Balance at beginning of period	$	-		$	-	$	398
Other comprehensive income before reclassification adjustment		523			-		74
Reclassification adjustment		(523	)		-		(472	)
Balance at end of period	$	-		$	-	$	-