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Balance Sheets (USD $)
Mar. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 3,560,193us-gaap_CashAndCashEquivalentsAtCarryingValue $ 5,594,578us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts receivable, net of allowance for doubtful accounts of $66,480 and $140,000, respectively 794,575us-gaap_AccountsReceivableNetCurrent 275,072us-gaap_AccountsReceivableNetCurrent
Related party trade accounts receivable 2,269us-gaap_AccountsReceivableRelatedPartiesCurrent 13,471us-gaap_AccountsReceivableRelatedPartiesCurrent
Inventories, net 1,268,254us-gaap_InventoryNet 1,775,648us-gaap_InventoryNet
Other current assets 259,799us-gaap_OtherAssetsCurrent 86,583us-gaap_OtherAssetsCurrent
Total current assets 5,885,090us-gaap_AssetsCurrent 7,745,352us-gaap_AssetsCurrent
Property and equipment, net 1,204,734us-gaap_PropertyPlantAndEquipmentNet 1,140,871us-gaap_PropertyPlantAndEquipmentNet
Total assets 7,089,824us-gaap_Assets 8,886,223us-gaap_Assets
Current liabilities:    
Accounts payable 1,015,861us-gaap_AccountsPayableCurrent 598,466us-gaap_AccountsPayableCurrent
Accrued liabilities 856,512us-gaap_AccruedLiabilitiesCurrent 1,105,152us-gaap_AccruedLiabilitiesCurrent
Notes payable, net of discount 846,790us-gaap_NotesPayable  
Customer deposits 19,825us-gaap_CustomerDepositsCurrent 41,667us-gaap_CustomerDepositsCurrent
Deferred revenue   54,218us-gaap_DeferredRevenue
Total current liabilities 2,738,988us-gaap_LiabilitiesCurrent 1,799,503us-gaap_LiabilitiesCurrent
Commitments and contingencies      
Stockholders' equity:    
Preferred stock, $.001 par value; 10,000,000 shares authorized, no shares issued and outstanding      
Common stock, $.001 par value, 80,000,000 shares authorized, 39,713,540 shares issued 39,714us-gaap_CommonStockValue 39,714us-gaap_CommonStockValue
Additional paid-in capital 63,723,103us-gaap_AdditionalPaidInCapitalCommonStock 63,587,400us-gaap_AdditionalPaidInCapitalCommonStock
Treasury stock, 24,331 shares at cost (234)us-gaap_TreasuryStockValue (234)us-gaap_TreasuryStockValue
Accumulated deficit (59,411,747)us-gaap_RetainedEarningsAccumulatedDeficit (56,540,160)us-gaap_RetainedEarningsAccumulatedDeficit
Total stockholders' equity 4,350,836us-gaap_StockholdersEquity 7,086,720us-gaap_StockholdersEquity
Total liabilities and stockholders' equity $ 7,089,824us-gaap_LiabilitiesAndStockholdersEquity $ 8,886,223us-gaap_LiabilitiesAndStockholdersEquity