CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
OPERATING ACTIVITIES:
Net loss	$ (41,929)	$ (33,593)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	5,081	4,641
Share-based compensation	2,472	1,981
Amortization of lease incentive	(215)	(217)
Swiss pension obligation	329	344
Amortization of deferred debt issue costs	2,882	506
Accrued preference share dividends	525	525
Net change in assets and liabilities:
Trade accounts receivable, net	231	(1,870)
Inventories	(1,065)	(1,333)
Accounts payable and accrued liabilities	(540)	1,614
Accrued compensation and benefits	(560)	10
Other assets	197	(1,629)
Net cash used in operating activities	(32,592)	(29,021)
INVESTING ACTIVITIES:
Increase in short-term investments	(43,000)
Realization of short-term investments	48,402
Purchase of property and equipment	(12,261)	(9,427)
Purchase of intangible assets	(68)	(65)
Net cash used in investing activities	(6,927)	(9,492)
FINANCING ACTIVITIES:
Repayment of finance leases	(56)	(81)
Proceeds from issuance of ordinary shares	45,266	16,371
Net cash generated from financing activities	45,210	16,290
Effect of exchange rate fluctuations on cash and cash equivalents	(1,314)	(2,878)
Change in cash and cash equivalents	4,377	(25,101)
Beginning cash and cash equivalents	4,754	44,100
Ending cash and cash equivalents	9,131	18,999
Supplemental cash flow disclosures:
Interest paid	$ 5,068	$ 2,391