Note 6 - Short-Term Investments (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block]

	December 31, 2012
			Gross		Gross
			Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Time deposits	$	60,656	$	-	$	-		$	60,656
Available-for-sale securities
Government bonds		1,631		4		-			1,635
Corporate bonds		500		-		-			500
Agency bonds		6,633		7		(4	)		6,636
	$	69,420	$	11	$	(4	)	$	69,427

	December 31, 2011
			Gross		Gross
			Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Time deposits	$	84,167	$	-	$	-		$	84,167
Available-for-sale securities
Government bonds		1,008		-		(1	)		1,007
Corporate bonds		5,670		-		(4	)		5,666
Agency bonds		2,184		-		(8	)		2,176
	$	93,029	$	-	$	(13	)	$	93,016

Investments Classified by Contractual Maturity Date [Table Text Block]

	December 31, 2012
			Fair
	Cost		Value
Time deposits
Due within one year	$	60,628	$	60,628
Due after one year through two years		28		28
		60,656		60,656
Available-for-sale securities
Due within one year		5,597		5,604
Due after one year through two years		3,167		3,167
		8,764		8,771
	$	69,420	$	69,427

	December 31, 2011
			Fair
	Cost		Value
Time deposits
Due within one year	$	84,138	$	84,138
Due after one year through two years		26		26
Due after two years		3		3
		84,167		84,167
Available-for-sale securities
Due within one year		7,344		7,338
Due after one year through two years		1,518		1,511
		8,862		8,849
	$	93,029	$	93,016

Schedule of Unrealized Loss on Investments [Table Text Block]

	December 31, 2012
	Less Than 12 Months				12 Months or Greater				Total
			Unrealized				Unrealized				Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Agency bonds	$	3,229	$	4	$	-	$	-	$	3,229	$	4

	December 31, 2011
	Less Than 12 Months				12 Months or Greater				Total
			Unrealized				Unrealized				Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Government bonds	$	1,007	$	1	$	-	$	-	$	1,007	$	1
Corporate bonds		5,666		4		-		-		5,666		4
Agency bonds		2,176		8		-		-		2,176		8
		8,849		13		-		-		8,849		13
Investment in Etrend HitechCorporation (“Etrend”) (note 9)		791		129		-		-		791		129
	$	9,640	$	142	$	-	$	-	$	9,640	$	142