Condensed Consolidated Statement of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares	Common Shares Subscribed	Additional Paid in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to adopt ASU 2016-09				$ 122		$ (122)
Beginning balance (in shares) at Mar. 31, 2017	60,275,757	60,275,757
Beginning balance at Mar. 31, 2017	$ 166,776	$ 1	$ (1)	251,733	$ 140	(85,097)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued to settle the warrant liability to Takeda (in shares)	4,432	4,432
Shares issued to settle the warrant liability to Takeda	$ 58	$ 0		58
Share-based compensation expense (in shares)		564,111
Share-based compensation expense	1,954	$ 0		1,954
Capital contribution — share-based compensation	247			247
Translation adjustment	264				264
Net loss	$ (23,317)					(23,317)
Ending balance (in shares) at Jun. 30, 2017	60,844,300	60,844,300
Ending balance at Jun. 30, 2017	$ 145,982	$ 1	$ (1)	$ 254,114	$ 404	$ (108,536)