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Consolidated Statements of Cash Flows (Unaudited) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Operating activities:    
Net loss $ (332,000)us-gaap_ProfitLoss $ (263,000)us-gaap_ProfitLoss
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 46,000us-gaap_DepreciationDepletionAndAmortization 39,000us-gaap_DepreciationDepletionAndAmortization
Provision for sales returns and doubtful accounts 5,000us-gaap_ProvisionForDoubtfulAccounts 1,000us-gaap_ProvisionForDoubtfulAccounts
Stock based compensation 7,000us-gaap_ShareBasedCompensation 7,000us-gaap_ShareBasedCompensation
Loss on investments 87,000us-gaap_GainLossOnInvestments 0us-gaap_GainLossOnInvestments
Changes in assets and liabilities:    
Trade accounts receivable (66,000)us-gaap_IncreaseDecreaseInAccountsReceivable 40,000us-gaap_IncreaseDecreaseInAccountsReceivable
Inventory 191,000us-gaap_IncreaseDecreaseInInventories 332,000us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets (49,000)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (47,000)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Trade accounts payable 60,000us-gaap_IncreaseDecreaseInAccountsPayable (135,000)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued liabilities (2,000)us-gaap_IncreaseDecreaseInAccruedLiabilities (53,000)us-gaap_IncreaseDecreaseInAccruedLiabilities
Other assets and liabilities 3,000us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet 2,000us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Total adjustments 282,000us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities 186,000us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities
Net cash used in operating activities (50,000)us-gaap_NetCashProvidedByUsedInOperatingActivities (77,000)us-gaap_NetCashProvidedByUsedInOperatingActivities
Impact of exchange rates on cash (7,000)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 1,000us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net decrease in cash and cash equivalents (57,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (76,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period 3,470,000us-gaap_CashAndCashEquivalentsAtCarryingValue 2,724,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period 3,413,000us-gaap_CashAndCashEquivalentsAtCarryingValue 2,648,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosures of cash flow information:    
Cash paid for interest 13,000us-gaap_InterestPaidNet 9,000us-gaap_InterestPaidNet
Cash paid for income taxes, net $ 3,000us-gaap_IncomeTaxesPaidNet $ 2,000us-gaap_IncomeTaxesPaidNet