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Unaudited Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2015
Mar. 31, 2015
Current assets:    
Cash and cash equivalents $ 32,572 $ 20,490
Accounts receivable, net 11,119 9,879
Inventory 16,150 20,596
Prepaid expenses and other current assets 8,263 10,764
Restricted cash 3,281 2,822
Total current assets 71,385 64,551
Property, plant and equipment, net 52,677 56,097
Intangibles, net 1,138 1,422
Restricted cash 795 1,236
Deferred tax assets 7,766 7,766
Other assets 499 2,753
Total assets 134,260 133,825
Current liabilities:    
Accounts payable and accrued expenses 17,980 21,615
Note payable, current portion, net of discount of $136 as of September 30, 2015 and $244 as of March 31, 2015 3,864 3,756
Derivative liabilities 1,498 2,999
Deferred revenue 9,692 11,019
Deferred tax liabilities 7,843 7,843
Total current liabilities 40,877 47,232
Note payable, net of discount of $191 as of September 30, 2015 and $290 as of March 31, 2015 1,976 3,877
Deferred revenue 3,404 2,756
Other liabilities 377 67
Total liabilities $ 46,634 $ 53,932
Commitments and contingencies (Note 13)
Stockholders' equity:    
Common stock $ 141 $ 96
Additional paid-in capital 1,010,220 985,921
Treasury stock, at cost (881) (771)
Accumulated other comprehensive income (loss) 10 (308)
Accumulated deficit (921,864) (905,045)
Total stockholders' equity 87,626 79,893
Total liabilities and stockholders' equity $ 134,260 $ 133,825