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Income Taxes (Details 1) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Net operating loss and tax credit carryforwards $ 44,514,698  
Capital loss carryforward 395,868  
Accrued expenses 98,594  
Deferred revenue 1,020,308  
Reserve for accounts receivable 2,146,815  
Reserve for inventory 133,617  
Start-up costs 110,125  
Excess of book over tax depreciation 1,314,230  
Stock option and restricted stock award expense 1,594,793  
Investment in unconsolidated entity 3,800,928  
Less: valuation allowance (54,940,552) (57,901,529)
Deferred tax assets 189,424  
Deferred tax liability:    
Property and equipment basis 71,234  
Prepaid expenses 118,190  
Deferred tax liabilities 189,424  
Net deferred tax asset $ 0