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CONSOLIDATED BALANCE SHEETS (USD $)
Dec. 31, 2014
Dec. 31, 2013
Current Assets:    
Cash $ 51,361,607us-gaap_Cash $ 54,191,260us-gaap_Cash
Accounts receivable, net of allowance for doubtful accounts of $21,119 and $26,555, respectively 2,154,217us-gaap_AccountsReceivableNetCurrent 1,690,753us-gaap_AccountsReceivableNetCurrent
Inventory 1,182,113us-gaap_InventoryNet 1,043,618us-gaap_InventoryNet
Other current assets 1,537,407us-gaap_PrepaidExpenseAndOtherAssetsCurrent 2,477,715us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Total current assets 56,235,344us-gaap_AssetsCurrent 59,403,346us-gaap_AssetsCurrent
Fixed assets, net 63,293us-gaap_PropertyPlantAndEquipmentNet 61,318us-gaap_PropertyPlantAndEquipmentNet
Other Assets:    
Prepaid expense 1,427,263us-gaap_PrepaidExpenseNoncurrent 1,750,455us-gaap_PrepaidExpenseNoncurrent
Intangible assets 1,228,588us-gaap_IntangibleAssetsNetExcludingGoodwill 665,588us-gaap_IntangibleAssetsNetExcludingGoodwill
Security deposit 125,000us-gaap_DepositsAssetsNoncurrent 135,686us-gaap_DepositsAssetsNoncurrent
Total other assets 2,780,851us-gaap_AssetsNoncurrent 2,551,729us-gaap_AssetsNoncurrent
Total assets 59,079,488us-gaap_Assets 62,016,393us-gaap_Assets
Current Liabilities:    
Accounts payable 6,327,129us-gaap_AccountsPayableCurrent 2,114,217us-gaap_AccountsPayableCurrent
Deferred revenue 522,613us-gaap_DeferredRevenue 1,602,580us-gaap_DeferredRevenue
Other current liabilities 3,840,639us-gaap_OtherLiabilitiesCurrent 3,601,189us-gaap_OtherLiabilitiesCurrent
Total current liabilities 10,690,381us-gaap_LiabilitiesCurrent 7,317,986us-gaap_LiabilitiesCurrent
Commitments and Contingencies      
Stockholders' Equity:    
Preferred stock - par value $0.001; 10,000,000 shares authorized; no shares issued and outstanding      
Common stock - par value $0.001; 250,000,000 shares authorized; 156,097,019 and 144,976,757 issued and outstanding, respectively 156,097us-gaap_CommonStockValue 144,977us-gaap_CommonStockValue
Additional paid in capital 182,982,846us-gaap_AdditionalPaidInCapitalCommonStock 135,086,056us-gaap_AdditionalPaidInCapitalCommonStock
Accumulated deficit (134,749,836)us-gaap_RetainedEarningsAccumulatedDeficit (80,532,626)us-gaap_RetainedEarningsAccumulatedDeficit
Total stockholders' equity 48,389,107us-gaap_StockholdersEquity 54,698,407us-gaap_StockholdersEquity
Total liabilities and stockholders' equity $ 59,079,488us-gaap_LiabilitiesAndStockholdersEquity $ 62,016,393us-gaap_LiabilitiesAndStockholdersEquity