CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES:
Net loss	$ (85,069)	$ (33,878)	$ (59,059)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and loss on disposal of fixed assets	9,461	2,945	1,676
Share-based compensation	4,221	2,004	1,138
Amortization of lease incentive	(428)	(434)	(443)
Swiss pension obligation	616
Amortization of deferred debt issue costs	6,774	1,472	776
Accrued preference share dividends	1,050	1,050	175
Change in financial liability for share warrants		(15,857)	22,966
Net change in assets and liabilities:
Trade accounts receivable, net	(584)	(519)	362
Inventories	(1,766)	(8,126)	(552)
Accounts payable and accrued liabilities	9,960	955	7,358
Accrued compensation and benefits	778	812	772
Other assets	(1,213)	2,603	(1,760)
Net cash used in operating activities	(56,200)	(46,973)	(26,591)
INVESTING ACTIVITIES:
Increase in short-term investments	(30,009)
Realization of short-term investments	13,971
Purchase of property and equipment	(20,155)	(28,906)	(23,854)
Purchase of intangible assets	(71)	(71)	(188)
Net cash used in investing activities	(36,264)	(28,977)	(24,042)
FINANCING ACTIVITIES:
Proceeds from (repayment of) finance leases	(141)	(39)	195
Proceeds from drawdown of new debt	84,000	15,500
Repayment of debt	(33,450)	(500)
Debt issue costs	(5,530)	(703)
Increase in cash reserve account	(5,040)
Proceeds from issuance of preference shares			15,000
Proceeds from issuance of ordinary shares	16,703	71,390	69,879
Net cash generated from financing activities	56,542	85,648	85,074
Effect of exchange rate fluctuations on cash and cash equivalents	(3,424)	(3,123)	(4,108)
Change in cash and cash equivalents	(39,346)	6,575	30,333
Beginning cash and cash equivalents	44,100	37,525	7,192
Ending cash and cash equivalents	4,754	44,100	37,525
Supplemental cash flow disclosures:
Interest paid	$ 1,702	$ 2,164	$ 1,364