Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015
Current assets:
Cash and cash equivalents	$ 38,561	$ 20,490
Accounts receivable, net	8,491	9,879
Inventory	17,080	20,596
Prepaid expenses and other current assets	9,726	10,764
Restricted cash	3,269	2,822
Total current assets	77,127	64,551
Property, plant and equipment, net	54,421	56,097
Intangibles, net	1,280	1,422
Restricted cash	795	1,236
Deferred tax assets	7,766	7,766
Other assets	1,526	2,753
Total assets	142,915	133,825
Current liabilities:
Accounts payable and accrued expenses	18,645	21,615
Note payable, current portion, net of discount of $190 as of June 30, 2015 and $244 as of March 31, 2015	3,810	3,756
Derivative liabilities	2,198	2,999
Deferred revenue	9,388	11,019
Deferred tax liabilities	7,843	7,843
Total current liabilities	41,884	47,232
Note payable, net of discount of $233 as of June 30, 2015 and $290 as of March 31, 2015	2,934	3,877
Deferred revenue	3,387	2,756
Other liabilities	90	67
Total liabilities	$ 48,295	$ 53,932
Commitments and contingencies (Note 13)
Stockholders' equity:
Common stock	$ 140	$ 96
Additional paid-in capital	1,009,393	985,921
Treasury stock, at cost	(869)	(771)
Accumulated other comprehensive income (loss)	122	(308)
Accumulated deficit	(914,166)	(905,045)
Total stockholders' equity	94,620	79,893
Total liabilities and stockholders' equity	$ 142,915	$ 133,825