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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 20,163 $ 2,911
Marketable securities 5,097 16,612
Restricted marketable securities 0 2,566
Accounts receivable, net of allowance for doubtful accounts of $3,586 at September 30, 2014 and $2,449 at December 31, 2013 27,257 39,985
Inventories 28,139 27,793
Deferred tax assets, net 100 100
Prepaid expenses and other 4,020 5,662
Total current assets 84,776 95,629
Property and equipment, net of accumulated depreciation of $67,403 at September 30, 2014 and $62,334 at December 31, 2013 5,778 9,901
Marketable securities 261 3,443
Intangible assets, net of accumulated amortization of $13,729 at September 30, 2014 and $12,983 at December 31, 2013 1,527 2,131
Deferred tax assets, net 81 81
Other assets 622 280
Total assets 93,045 111,465
Current liabilities:    
Accounts payable 29,881 24,538
Accrued expenses 20,714 23,271
Current portion of litigation settlement 7 4,326
Short-term margin loan facility 0 2,566
Total current liabilities 50,602 54,701
Warrant liability 9,727 0
Other long-term liabilities 1,615 1,848
Non-current portion of litigation settlement 5,000 10,000
Total liabilities 66,944 66,549
Commitments and Contingencies      
Stockholders' equity:    
Preferred stock, par value $0.001; 2,000 shares authorized 0 0
Common stock, par value $0.001; 50,000 shares authorized, 44,306 and 34,097 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively 44 34
Additional paid-in capital 456,836 441,368
Accumulated other comprehensive income 0 5
Accumulated deficit (406,719) (371,491)
Stockholders' equity before treasury stock 50,161 69,916
Treasury stock at cost; 2,436 common shares at September 30, 2014 and December 31, 2013, respectively (25,000) (25,000)
Total stockholders' equity 25,161 44,916
Total liabilities, convertible preferred stock and stockholders' equity 93,045 111,465
Convertible Series C Preferred Stock [Member]
    
Current liabilities:    
Convertible Series C preferred stock, par value $0.001; 87 and no shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively $ 940 $ 0