CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
OPERATING ACTIVITIES:
Net loss	$ (108,470)	$ (102,773)	$ (105,386)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and loss on disposal of fixed assets	8,620	12,276	12,767
Share-based compensation	4,984	4,467	4,957
Increase in deferred lease rentals	726	293	372
Swiss pension obligation	1,054	756	575
Amortization of deferred debt issue costs	9,079	7,043	5,908
Impairment of short term investments	2,285
Accrued preference share dividends	1,050	1,050	1,050
Income taxes	1,926	368	44
Net change in assets and liabilities:
Trade accounts receivable, net	568	(2,177)	(637)
Inventories	(475)	(4,967)	(93)
Accounts payable and accrued liabilities	(2,514)	2,456	370
Accrued compensation and benefits	4,039	1,218	1,121
Other assets	(454)	(656)	3,297
Net cash used in operating activities	(77,582)	(80,646)	(75,655)
INVESTING ACTIVITIES:
Increase in short-term investments	(87,247)	(95,000)	(119,000)
Realization of short-term investments	134,936	69,412	34,735
Purchase of property and equipment	(4,240)	(4,598)	(4,791)
Purchase of intangible assets		(2)	(3)
Net cash from (used in) investing activities	43,449	(30,188)	(89,059)
FINANCING ACTIVITIES:
Repayment of finance leases	(633)	(524)	(486)
Proceeds from drawdown of new debt		25,000	36,000
Debt issue costs		(874)	(1,216)
Fee paid to noteholders			(3,900)
Proceeds from issuance of ordinary shares and warrants	80,881	90,973	115,024
Net cash generated from financing activities	80,248	114,575	145,422
Effect of exchange rate fluctuations on cash and cash equivalents	(4,358)	(2,404)	5,690
Change in cash and cash equivalents	41,757	1,337	(13,602)
Beginning cash and cash equivalents	12,940	11,603	25,205
Ending cash and cash equivalents	54,697	12,940	11,603
Supplemental cash flow disclosures:
Interest paid	17,529	15,776	11,838
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	45,673	3,923	4,096
Restricted cash	9,024	9,017	7,507
Ending cash and cash equivalents	$ 54,697	$ 12,940	$ 11,603