CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 13,008	$ 4,754
Short-term investments	27,661	16,057
Trade accounts receivable, net	2,800	2,556
Inventories	14,810	13,636
Prepaid expenses and other current assets	4,682	3,629
Total current assets	62,961	40,632
Cash reserve account	5,040	5,040
Property and equipment, net	70,062	63,530
Intangible assets, net	784	769
Total assets	138,847	109,971
Current liabilities:
Accounts payable	10,098	10,782
Accrued compensation and benefits	2,846	3,641
Accrued expenses and other current liabilities	13,398	13,509
Current portion of lease incentive	441	422
Current portion of capital lease obligation	1,445	1,374
Total current liabilities	28,228	29,728
Long-term debt	82,150	80,704
Lease incentive, less current portion	772	844
Capital lease obligation, less current portion	153	174
Defined benefit pension plan obligation	5,535	5,337
Total liabilities	134,376	134,062
Commitments and contingencies
Shareholders' equity (deficit)
Additional paid in capital	17,170	15,885
Accumulated other comprehensive loss	(17,051)	(19,292)
Accumulated deficit	(213,537)	(193,301)
Total shareholders' equity (deficit)	4,471	(24,091)
Total liabilities and shareholders' equity (deficit)	138,847	109,971
7% Cumulative Redeemable Preference Shares [Member]
Current liabilities:
Preferred stock value	17,538	17,275
Ordinary Shares [Member]
Shareholders' equity (deficit)
Common stock value	$ 217,889	$ 172,617