CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenue:
Product sales	$ 20,127	$ 18,022	$ 17,658
Other revenues	2,100	500	750
Total revenue	22,227	18,522	18,408
Cost of revenue	(10,844)	(9,658)	(9,763)
Gross profit	11,383	8,864	8,645
Operating expenses:
Sales and marketing	(5,660)	(3,073)	(2,750)
Research and development, net of government grants	(57,064)	(28,781)	(19,216)
General and administrative expense:
Compensation expense in respect of share options and management equity incentives	(4,221)	(2,004)	(1,138)
Other general and administrative expenses	(18,497)	(24,094)	(15,255)
Total general and administrative expense	(22,718)	(26,098)	(16,393)
Total operating expense	(85,442)	(57,952)	(38,359)
Operating loss	(74,059)	(49,088)	(29,714)
Other income (expense):
Interest expense, net	(9,903)	(4,151)	(2,315)
Change in financial liability for share warrants		15,857	(22,966)
Other, net	(1,107)	3,504	(4,064)
Other income (expense), net	(11,010)	15,210	(29,345)
Loss before income taxes	(85,069)	(33,878)	(59,059)
Net loss	(85,069)	(33,878)	(59,059)
Other comprehensive income (loss):
Change in fair value of effective portion of foreign currency cash flow hedges	(63)	9	(293)
Unrealized gain on short-term investments	19
Foreign currency gain (loss)	(6,215)	(3,028)	(5,114)
Provision for pension benefit obligation	(410)	(4,502)
Other comprehensive loss, net	(6,669)	(7,521)	(5,407)
Comprehensive loss	(91,738)	(41,399)	(64,466)
Net loss available to ordinary shareholders - basic and diluted	$ (85,069)	$ (33,878)	$ (59,059)
Loss per share - basic and diluted	$ (3.02)	$ (1.73)	$ (4.00)
Weighted-average shares outstanding - basic and diluted	28,145,472	19,558,152	14,773,386