Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2015

Investments Debt And Equity Securities [Abstract]

Schedule of Marketable Securities

Marketable securities consisted of the following as of December 31, 2015 (in thousands):

	December 31, 2015
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Available-for-sale securities:
NantKwest common shares	$	10,000	$	87,366	$	—	$	97,366