Note 8 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

				Fair Value Measurements at Reporting Date Used
	Total			Quoted Prices in Active Markets For Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Assets
Cash, including short-term deposits(1)	$	80,085		$	80,085	$	-	$	-
United States government securities(2)		99,477			99,477		-		-
Corporate securities(2)		20,117			20,117		-		-
Commercial paper(2)		22,291			-		22,291		-
Corporate obligations(2)		48,714			-		46,931		1,783
Non-controlling interests in certain funds(3)		1,021			-		-		1,021
	$	271,705		$	199,679	$	69,222	$	2,804
Liabilities
Rogue contingent consideration(4)	$	(475	)	$	-	$	-	$	(475	)

				Fair Value Measurements at Reporting Date Used
	Total			Quoted Prices in Active Markets For Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Assets
Cash, including short-term deposits(1)	$	8,601		$	8,601	$	-	$	-
U.S. government securities(2)		309,780			309,780		-		-
Government agencies(2)		3,526			3,526		-		-
Corporate obligations(2)		1,521			-		1,521		-
Non-controlling interests in certain funds(3)		1,117			-		-		1,117
	$	324,545		$	321,907	$	1,521	$	1,117
Liabilities
Rogue contingent consideration(4)	$	(1,218	)	$	-	$	-	$	(1,218	)

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Amount
	(in thousands)
Balance, December 31, 2010	$	-
Acquisition of Rogue		(1,218	)
Change in fair value		-
Balance, December 31, 2011		(1,218	)
Change in fair value		743
Balance, December 31, 2012	$	(475	)