Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

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
		March 31,		Assets		Inputs		Inputs
		2014		(Level 1)		(Level 2)		(Level 3)
Assets
Domestic money market funds	$	39,852	$	39,852	$	-	$	-
Non domestic bank term deposits		31,828		31,828		-		-
Cash equivalents at fair value		71,680		71,680		-		-
Total Assets	$	71,680	$	71,680	$	-	$	-

				Fair Value Measurements at
				Reporting Date Using
				Quoted Prices in		Significant
				Active Markets		Other		Significant
				for Identical		Observable		Unobservable
		December 31,		Assets		Inputs		Inputs
		2013		(Level 1)		(Level 2)		(Level 3)
Assets
Domestic money market funds	$	18,276	$	18,276	$	-	$	-
Non domestic bank term deposits		32,947		32,947		-		-
Cash equivalents at fair value		51,223		51,223		-		-
Total Assets	$	51,223	$	51,223	$	-	$	-