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, 2021	$ (35,581)	$ 540,813	$ 38,116	$ (14,598)	$ (599,912)
Beginning balance, Shares at Mar. 31, 2021		2,531,610
Issue of shares upon exercise of incentive share options and vesting of RSUs	(81)	$ (81)
Issue of shares upon exercise of incentive share options and vesting of RSUs, Shares		9,447
Issues of shares associated with Senior Secured Note modification	2,263		2,263
Issues of shares associated with Senior Secured Note modification, Shares		21,711
Net loss	(99,218)				(99,218)
Change in fair value of effective portion of foreign currency cash flow hedges	(380)			(380)
Change in unrealized gain in/on short-term investments	(193)			(193)
Foreign currency cumulative translation adjustment	2,798			2,798
Provision for pension benefit obligation	44			44
Other comprehensive loss	2,269			2,269
Stock-based compensation	4,738		4,738
Ending balance at Dec. 31, 2021	(125,610)	$ 540,732	45,117	(12,329)	(699,130)
Ending balance, Shares at Dec. 31, 2021		2,562,768
Beginning balance at Sep. 30, 2021	(85,328)	$ 540,733	41,343	(13,095)	(654,309)
Beginning balance, Shares at Sep. 30, 2021		2,539,790
Issue of shares upon exercise of incentive share options and vesting of RSUs	(1)	$ (1)
Issue of shares upon exercise of incentive share options and vesting of RSUs, Shares		1,267
Issue of Consent Shares associated with Senior Secured Note modification	2,263		2,263
Issue of Consent Shares associated with Senior Secured Note modification, Shares		21,711
Net loss	(44,821)				(44,821)
Change in fair value of effective portion of foreign currency cash flow hedges	(37)			(37)
Change in unrealized gain in/on short-term investments	0
Foreign currency cumulative translation adjustment	788			788
Provision for pension benefit obligation	15			15
Other comprehensive loss	766			766
Stock-based compensation	1,511		1,511
Ending balance at Dec. 31, 2021	(125,610)	$ 540,732	45,117	(12,329)	(699,130)
Ending balance, Shares at Dec. 31, 2021		2,562,768
Beginning balance at Mar. 31, 2022	$ (144,098)	$ 540,736	46,399	(6,191)	(725,042)
Beginning balance, Shares at Mar. 31, 2022	2,565,284	2,565,284
Issue of shares upon exercise of pre-funded warrants		630,273
Stock issued during period value new issues	$ 17,903	$ 17,903
Issue of shares and pre-funded warrants, net of issue costs, Shares		811,458
Issue of shares upon exercise of incentive share options and vesting of RSUs, Shares		27,998
Net loss	(98,118)				(98,118)
Change in fair value of effective portion of foreign currency cash flow hedges	0
Change in unrealized gain in/on short-term investments	(24)			(24)
Foreign currency cumulative translation adjustment	12,817			12,817
Provision for pension benefit obligation	42			42
Other comprehensive loss	12,835			12,835
Stock-based compensation	2,593		2,593
Ending balance at Dec. 31, 2022	$ (208,885)	$ 558,639	48,992	6,644	(823,160)
Ending balance, Shares at Dec. 31, 2022	4,035,013	4,035,013
Beginning balance at Sep. 30, 2022	$ (182,090)	$ 558,639	48,068	21,039	(809,836)
Beginning balance, Shares at Sep. 30, 2022		3,396,118
Issue of shares upon exercise of pre-funded warrants		630,273
Issue of shares upon exercise of incentive share options and vesting of RSUs, Shares		8,622
Net loss	(13,324)				(13,324)
Change in fair value of effective portion of foreign currency cash flow hedges	0
Change in unrealized gain in/on short-term investments	(50)			(50)
Foreign currency cumulative translation adjustment	(14,359)			(14,359)
Provision for pension benefit obligation	14			14
Other comprehensive loss	(14,395)			(14,395)
Stock-based compensation	924		924
Ending balance at Dec. 31, 2022	$ (208,885)	$ 558,639	$ 48,992	$ 6,644	$ (823,160)
Ending balance, Shares at Dec. 31, 2022	4,035,013	4,035,013