Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

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
			June 30,	Assets	Inputs	Inputs
			2012	(Level 1)	(Level 2)	(Level 3)
			In thousands
Assets
	Domestic money market funds		$41,844	$41,844	$0	$0
	Non domestic bank certificates of deposit		22,560	22,560	0	0
		Cash equivalents at fair value	64,404	64,404	0	0
Total Assets			$64,404	$64,404	$0	$0
				Fair Value Measurements at Reporting Date Using
				Quoted Prices in	Significant
				Active Markets	Other	Significant
				for Identical	Observable	Unobservable
			December 31,	Assets	Inputs	Inputs
			2011	(Level 1)	(Level 2)	(Level 3)
			In thousands
Assets
	Domestic money market funds		$42,273	$42,273	$0	$0
	Non domestic bank certificates of deposit		22,520	22,520	0	0
		Cash equivalents at fair value	64,793	64,793	0	0
Total Assets			$64,793	$64,793	$0	$0
Liabilities
	IDSI acquisition short-term note		$(945)	$0	$(945)	$0
		Total current maturities of other long-term debt	(945)	0	(945)	0
Total Liabilities			$(945)	$0	$(945)	$0