Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2015

Related Party Transactions [Abstract]

Summary of Related Party Expenses

Related party expenses consisted of the following:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Related Parties:
REGENX - R&D Expense	$	1,000	$	1,445	$	2,000	$	4,881
University of Pennsylvania - R&D Expense		1,498		—		4,158		—
Fidelity Biosciences - G&A Expense		—		14		—		42
	$	2,498	$	1,459	$	6,158	$	4,923