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Unaudited Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2015
Mar. 31, 2015
Current assets:    
Cash and cash equivalents $ 36,437 $ 20,490
Accounts receivable, net 17,052 9,879
Inventory 15,238 20,596
Prepaid expenses and other current assets 5,611 10,764
Restricted cash 433 2,822
Total current assets 74,771 64,551
Property, plant and equipment, net 51,204 56,097
Intangibles, net 996 1,422
Restricted cash 795 1,236
Deferred tax assets 7,766 7,766
Other assets 303 2,753
Total assets 135,835 133,825
Current liabilities:    
Accounts payable and accrued expenses 20,723 21,615
Note payable, current portion, net of discount of $83 as of December 31, 2015 and $244 as of March 31, 2015 3,584 3,756
Derivative liabilities 2,590 2,999
Deferred revenue 10,676 11,019
Deferred tax liabilities 7,843 7,843
Total current liabilities 45,416 47,232
Note payable, net of discount of $161 as of December 31, 2015 and $290 as of March 31, 2015 1,339 3,877
Deferred revenue 3,261 2,756
Other liabilities 790 67
Total liabilities $ 50,806 $ 53,932
Commitments and contingencies (Note 13)
Stockholders' equity:    
Common stock $ 141 $ 96
Additional paid-in capital 1,011,016 985,921
Treasury stock, at cost (881) (771)
Accumulated other comprehensive loss (425) (308)
Accumulated deficit (924,822) (905,045)
Total stockholders' equity 85,029 79,893
Total liabilities and stockholders' equity $ 135,835 $ 133,825