CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 14,328	$ 44,100
Short-term investments	30,009
Trade accounts receivable, net	1,639	2,269
Inventories	13,168	12,584
Prepaid expenses and other current assets	3,056	2,780
Total current assets	62,200	61,733
Property and equipment, net	60,905	57,115
Intangible assets, net	776	902
Total assets	123,881	119,750
Current liabilities:
Accounts payable	9,463	7,286
Accrued compensation and benefits	2,799	3,294
Accrued expenses and other current liabilities	12,129	9,180
Current portion of long-term debt		1,000
Current portion of lease incentive	415	439
Current portion of capital lease obligation	1,363	152
Total current liabilities	26,169	21,351
Long-term debt, less current portion	80,063	27,910
Lease incentive, less current portion	933	1,316
Capital lease obligation, less current portion	188	1,723
Defined benefit pension plan obligation	4,597	4,502
Total liabilities	128,963	73,027
Commitments and contingencies
Shareholders' equity (deficit)
Additional paid in capital	14,753	11,664
Accumulated other comprehensive loss	(19,130)	(12,623)
Accumulated deficit	(172,993)	(108,232)
Total shareholders' equity (deficit)	(5,082)	46,723
Total liabilities and shareholders' equity (deficit)	123,881	119,750
7% Cumulative Redeemable Preference Shares [Member]
Current liabilities:
Preferred stock value	17,013	16,225
Ordinary Shares [Member]
Shareholders' equity (deficit)
Common stock value	$ 172,288	$ 155,914