CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) - 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, 2018	$ (14,631)	$ 253,934	$ 23,708	$ (16,634)	$ (275,639)
Beginning balance, Shares at Mar. 31, 2018		45,646,424
Issue of shares upon exercise of warrants, Amount	2,175	$ 2,175
Issue of shares upon exercise of warrants, Shares		375,000
Issue of shares upon exercise of incentive share options and vesting of RSU's, Amount	20	$ 20
Issue of shares upon exercise of incentive share options and vesting of RSU's, Shares		43,277
Net loss	(25,177)				(25,177)
Change in the fair value of foreign currency cash flow hedges	(332)			(332)
Change in unrealized gain on short-term investments	26			26
Foreign currency gain (loss) on:
Long-term investment nature intra-entity balances	3,629			3,629
Retranslation of foreign entities	(3,272)			(3,272)
Provision for pension benefit obligation	36			36
Other comprehensive loss	87			87
Stock-based compensation	1,347		1,347
Ending balance at Jun. 30, 2018	(36,179)	$ 256,129	25,055	(16,547)	(300,816)
Ending balance, Shares at Jun. 30, 2018		46,064,701
Beginning balance at Mar. 31, 2019	$ 1,714	$ 368,958	28,665	(14,884)	(381,025)
Beginning balance, Shares at Mar. 31, 2019	65,900,447	65,900,447
Issue of shares upon exercise of incentive share options and vesting of RSU's, Amount	$ 63	$ 63
Issue of shares upon exercise of incentive share options and vesting of RSU's, Shares		312,446
Net loss	(23,571)				(23,571)
Change in the fair value of foreign currency cash flow hedges	(120)			(120)
Change in unrealized gain on short-term investments	147			147
Foreign currency gain (loss) on:
Long-term investment nature intra-entity balances	8,288			8,288
Retranslation of foreign entities	(9,302)			(9,302)
Provision for pension benefit obligation	48			48
Other comprehensive loss	(939)			(939)
Stock-based compensation	1,178		1,178
Cumulative effect of accounting changes	363				363
Ending balance at Jun. 30, 2019	$ (21,192)	$ 369,021	$ 29,843	$ (15,823)	$ (404,233)
Ending balance, Shares at Jun. 30, 2019	66,212,893	66,212,893