CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
OPERATING ACTIVITIES:
Net loss	$ (20,236)	$ (16,235)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	2,464	2,286
Share-based compensation	1,285	898
Amortization of lease incentive	(109)	(109)
Swiss pension obligation	172	185
Amortization of deferred debt issue costs	1,446	228
Accrued preference share dividends	263	263
Net change in assets and liabilities:
Trade accounts receivable, net	(170)	(204)
Inventories	(608)	(560)
Accounts payable and accrued liabilities	(2,005)	1,406
Accrued compensation and benefits	(837)	(152)
Other assets	(811)	(1,247)
Net cash used in operating activities	(19,146)	(13,241)
INVESTING ACTIVITIES:
Increase in short-term investments	(43,000)
Realization of short-term investments	31,434
Purchase of property and equipment	(5,436)	(6,579)
Purchase of intangible assets	(6)
Net cash used in investing activities	(17,008)	(6,579)
FINANCING ACTIVITIES:
Repayment of finance leases	(29)	(37)
Proceeds from issuance of ordinary shares	45,273
Net cash generated from financing activities	45,244	(37)
Effect of exchange rate fluctuations on cash and cash equivalents	(836)	(1,860)
Change in cash and cash equivalents	8,254	(21,717)
Beginning cash and cash equivalents	4,754	44,100
Ending cash and cash equivalents	13,008	22,383
Supplemental cash flow disclosures:
Interest paid	$ 5,068	$ 679