Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Payables and Accruals [Abstract]
Research and development expenses	$ 9,737	$ 0
Salaries, bonuses, and other compensation expenses	797	0
Legal expenses	481	164
Other expenses	963	59
Total accrued expenses	$ 11,978	$ 223