Cash and Cash Equivalents, Short-term Investments and Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2014

Cash and Cash Equivalents [Abstract]

Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block]

Cash and cash equivalents consist of the following significant asset investment classes as of March 31, 2014 and December 31, 2013 (in thousands):

	March 31, 2014
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash / Cash Equivalents		Security Classification
Cash	$	52,906	$	—	$	—	$	52,906	$	52,906	N/A
Money market fund	54,652		—		—		54,652		54,652		Available for sale
Total cash and cash equivalents	$	107,558	$	—	$	—	$	107,558	$	107,558

c	December 31, 2013
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash / Cash Equivalents		Security Classification
Cash	$	38,823	$	—	$	—	$	38,823	$	38,823	N/A
Money market fund	65,708		—		—		65,708		65,708		Available for sale
Total cash and cash equivalents	$	104,531	$	—	$	—	$	104,531	$	104,531

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

The following table shows our financial assets measured at fair value, on a recurring basis, with money market funds recorded within cash and cash equivalents (in thousands):

	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Total Fair Value
Money market fund at March 31, 2014	$	54,652	$	54,652
Money market fund at December 31, 2013	$	65,708	$	65,708