Note 4 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2011

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	December 31, 2011						December 31, 2010
(In thousands)	Level 1		Level 2		Total		Level 1		Level 2		Total
Assets:
Money market funds	$	163,368	$	-	$	163,368	$	203,318	$	-	$	203,318
Corporate debt securities		-		44,877		44,877		20,434		-		20,434
Commercial paper		-		8,996		8,996		-		7,998		7,998
U.S. government sponsored agency bonds		2,015		-		2,015		8,725		-		8,725
U.S. treasury securities		5,513		-		5,513		1,997		-		1,997
Foreign currency hedge contracts		-		6,838		6,838		-		17,763		17,763
Total	$	170,896	$	60,711	$	231,607	$	234,474	$	25,761	$	260,235
Liabilities:
Foreign currency hedge contracts	$	-	$	9,783	$	9,783	$	-	$	12,810	$	12,810