CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) - 6 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Ordinary Shares [Member]	Additional paid in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Beginning balance at Mar. 31, 2017	$ (24,091)	$ 172,617	$ 15,885	$ (19,292)	$ (193,301)
Beginning balance, Shares at Mar. 31, 2017	29,567,698	29,567,698
Issue of shares, net of issue costs, Amount	$ 45,159	$ 45,159
Issue of shares, net of issue costs, Shares		8,050,000
Issue of shares upon exercise of incentive share options and vesting of RSU's, Amount	107	$ 107
Issue of shares upon exercise of incentive share options and vesting of RSU's, Shares		76,833
Net loss	(41,929)				(41,929)
Change in fair value of effective portion of foreign currency cash flow hedges	473			473
Unrealized gain on short-term investments	32			32
Foreign currency gain (loss) on:
Long-term investment nature intra- entity balances	(4,789)			(4,789)
Retranslation of foreign entities	6,101			6,101
Provision for pension benefit obligation	87			87
Other comprehensive income (loss), net	1,904			1,904
Stock-based compensation	2,472		2,472
Ending balance at Sep. 30, 2017	$ (16,378)	$ 217,883	$ 18,357	$ (17,388)	$ (235,230)
Ending balance, Shares at Sep. 30, 2017	37,694,531	37,694,531