Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Measurements [Abstract]

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

				Fair Value Measurements at
				Reporting Date Using
				Quoted Prices in		Significant
				Active Markets		Other		Significant
				for Identical		Observable		Unobservable
		September 30,		Assets		Inputs		Inputs
		2013		(Level 1)		(Level 2)		(Level 3)
Assets
Domestic money market funds	$	50,902	$	50,902	$	-	$	-
Non domestic bank term deposits		31,943		31,943		-		-
Cash equivalents at fair value		82,845		82,845		-		-
Total Assets	$	82,845	$	82,845	$	-	$	-

				Fair Value Measurements at
				Reporting Date Using
				Quoted Prices in		Significant
				Active Markets		Other		Significant
				for Identical		Observable		Unobservable
		December 31,		Assets		Inputs		Inputs
		2012		(Level 1)		(Level 2)		(Level 3)
Assets
Domestic money market funds	$	58,620	$	58,620	$	-	$	-
Non domestic bank term deposits		26,045		26,045		-		-
Cash equivalents at fair value		84,665		84,665		-		-
Total Assets	$	84,665	$	84,665	$	-	$	-