CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Total revenue	$ 9,954	$ 10,172	$ 27,624	$ 28,728
Cost of revenue	(3,904)	(7,928)	(31,141)	(17,579)
Gross margin	6,050	2,244	(3,517)	11,149
Operating expenses:
Sales and marketing	(3,298)	(2,878)	(10,117)	(8,011)
Research and development, net of government grants	(15,909)	(13,260)	(44,316)	(42,545)
General and administrative expense:
Compensation expense in respect of share options and management equity incentives	(924)	(2,319)	(2,593)	(5,546)
Other general and administrative expenses	(11,470)	(15,038)	(28,534)	(32,009)
Total general and administrative expense	(12,394)	(17,357)	(31,127)	(37,555)
Total operating expense	(31,602)	(33,495)	(85,560)	(88,111)
Operating loss	(25,551)	(31,251)	(89,077)	(76,962)
Other (expense) income:
Interest expense, net	(8,233)	(9,559)	(9,421)	(21,914)
Other, net	20,591	(3,507)	1,011	677
Other income (expense), net	12,358	(13,066)	(8,410)	(21,237)
Loss before income taxes	(13,193)	(44,317)	(97,487)	(98,199)
Provision for income taxes	(131)	(504)	(631)	(1,019)
Net loss	(13,324)	(44,821)	(98,118)	(99,218)
Other comprehensive income (loss):
Change in fair value of foreign currency cash flow hedges	0	(37)	0	(380)
Change in unrealized gain on short-term investments	(50)	0	(24)	(193)
Foreign currency (loss) gain	(14,359)	788	12,817	2,798
Provision for pension benefit obligation	14	15	42	44
Other comprehensive income (loss), net	(14,395)	766	12,835	2,269
Comprehensive loss	(27,719)	(44,055)	(85,283)	(96,949)
Net loss available to ordinary shareholders - basic	(13,324)	(44,821)	(98,118)	(99,218)
Net loss available to ordinary shareholders - diluted	$ (13,324)	$ (44,821)	$ (98,118)	$ (99,218)
Loss per share - basic	$ (3.13)	$ (17.55)	$ (26.45)	$ (39.03)
Loss per share - diluted	$ (3.13)	$ (17.55)	$ (26.45)	$ (39.03)
Weighted-average shares outstanding - basic	4,250,698	2,553,179	3,709,021	2,542,394
Weighted-average shares outstanding - diluted	4,250,698	2,553,179	3,709,021	2,542,394
Product Sales [Member]
Revenue:
Total revenue	$ 9,954	$ 10,172	$ 27,624	$ 28,497
Other Revenues [Member]
Revenue:
Total revenue	$ 0	$ 0	$ 0	$ 231