CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 4,754	$ 44,100
Short-term investments	16,057
Trade accounts receivable, net	2,556	2,269
Inventories	13,636	12,584
Prepaid expenses and other current assets	3,629	2,780
Total current assets	40,632	61,733
Cash reserve account	5,040
Property and equipment, net	63,530	57,115
Intangible assets, net	769	902
Total assets	109,971	119,750
Current liabilities:
Accounts payable	10,782	7,286
Accrued compensation and benefits	3,641	3,294
Accrued expenses and other current liabilities	13,509	9,180
Current portion of long-term debt		1,000
Current portion of lease incentive	422	439
Current portion of capital lease obligation	1,374	152
Total current liabilities	29,728	21,351
Long-term debt, less current portion	80,704	27,910
Lease incentive, less current portion	844	1,316
Capital lease obligation, less current portion	174	1,723
Defined benefit pension plan obligation	5,337	4,502
Total liabilities	134,062	73,027
Commitments and contingencies
Shareholders' equity (deficit)
Additional paid in capital	15,885	11,664
Accumulated other comprehensive loss	(19,292)	(12,623)
Accumulated deficit	(193,301)	(108,232)
Total shareholders' equity (deficit)	(24,091)	46,723
Total liabilities and shareholders' equity (deficit)	109,971	119,750
7% Cumulative Redeemable Preference Shares [Member]
Current liabilities:
Preferred stock value	17,275	16,225
Ordinary Shares [Member]
Shareholders' equity (deficit)
Common stock value	$ 172,617	$ 155,914