Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Schedule of Non-Controlling Interest in Subsidiary

The Company’s ownership of Silver Creek was 64% as of September 30, 2014 and December 31, 2013. The consolidated financial statement activity related to Silver Creek was as follows:

(in thousands)	Non-Controlling Interest
Balance at December 31, 2013	$	337
Net loss attributable to Silver Creek		(487	)
Balance at September 30, 2014	$	(150	)

(in thousands)	Non-Controlling Interest
Balance at December 31, 2012	$	97
Net loss attributable to Silver Creek		(471	)
Balance at September 30, 2013	$	(374	)

Schedule of Available-for-Sale Securities, All of Which Have Maturities of Twelve Months or Less

Available-for-sale securities, all of which have maturities of twelve months or less, as of September 30, 2014 consisted of the following:

	Amortized Cost		Unrealized Losses			Fair Value
	(in thousands)
September 30, 2014:
Commercial paper	$	3,000	$	—		$	3,000
Corporate debt securities		50,400		(44	)		50,356
Total	$	53,400	$	(44	)	$	53,356