CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Current assets:
Cash and cash equivalents	$ 4,664	$ 4,096
Short-term investments	133,371	90,729
Trade accounts receivable, net	5,037	3,348
Inventories	19,791	15,551
Prepaid expenses and other current assets	3,856	3,202
Total current assets	166,719	116,926
Restricted cash	9,015	7,507
Property and equipment, net	43,425	47,293
Operating lease right-of-use assets	22,798
Intangible assets, net	687	751
Deferred income taxes	564	605
Other non-current assets	4,747	4,688
Total assets	247,955	177,770
Current liabilities:
Accounts payable	3,513	5,936
Accrued compensation and benefits	5,899	6,149
Accrued expenses and other current liabilities	12,839	12,458
Current portion of operating lease liability	3,157
Current portion of deferred lease rental benefit		435
Current portion of finance lease obligation	522	471
Total current liabilities	25,930	25,449
Long-term debt, less current portion	153,717	121,855
Operating lease liability, less current portion	21,139
Deferred lease rental benefit, less current portion		1,144
Finance lease obligation, less current portion	950	865
Defined benefit pension plan obligation	7,998	7,368
7% Cumulative redeemable preference shares	20,163	19,375
Total liabilities	229,897	176,056
Commitments and contingencies
Shareholders' equity:
Ordinary shares (nil par value) 80,256,946 and 65,900,447 issued and outstanding at December 31, 2019 and March 31, 2019 respectively	459,686	368,958
Additional paid in capital	32,040	28,665
Accumulated other comprehensive loss	(14,960)	(14,884)
Accumulated deficit	(458,708)	(381,025)
Total shareholders' equity	18,058	1,714
Total liabilities and shareholders' equity	$ 247,955	$ 177,770