CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 22,383	$ 44,100
Trade accounts receivable, net	2,357	2,269
Inventories	12,774	12,584
Prepaid expenses and other current assets	3,931	2,780
Total current assets	41,445	61,733
Property and equipment, net	59,821	57,115
Intangible assets, net	819	902
Total assets	102,085	119,750
Current liabilities:
Accounts payable	8,606	7,286
Accrued compensation and benefits	2,974	3,294
Accrued expenses and other current liabilities	9,103	9,180
Current portion of long-term debt	4,000	1,000
Current portion of lease incentive	432	439
Current portion of capital lease obligation	134	152
Total current liabilities	25,249	21,351
Long-term debt, less current portion	25,138	27,910
Lease incentive, less current portion	1,187	1,316
Capital lease obligation, less current portion	1,593	1,723
Defined benefit pension plan obligation	4,574	4,502
Total liabilities	74,229	73,027
Commitments and contingencies
Shareholders' equity
Additional paid in capital	12,562	11,664
Accumulated other comprehensive loss	(16,153)	(12,623)
Accumulated deficit	(124,467)	(108,232)
Total shareholders' equity	27,856	46,723
Total liabilities and shareholders' equity	102,085	119,750
7% Cumulative Redeemable Preference Shares [Member]
Current liabilities:
Preferred stock value	16,488	16,225
Ordinary Shares [Member]
Shareholders' equity
Common stock value	$ 155,914	$ 155,914