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Consolidated Statements of Cash Flows (Unaudited) (USD $)
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Operating activities:    
Net loss $ (402,000) $ (469,000)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 87,000 91,000
Provision for sales returns and doubtful accounts 3,000 59,000
Stock based compensation 14,000 12,000
Changes in assets and liabilities:    
Trade accounts receivable (91,000) 185,000
Inventory 457,000 617,000
Prepaid expenses and other current assets (33,000) (23,000)
Trade accounts payable 244,000 (51,000)
Accrued liabilities (51,000) (73,000)
Other assets and liabilities 97,000  
Total adjustments 727,000 817,000
Net cash provided by operating activities 325,000 348,000
Investing activities:    
Acquisition of property & equipment (8,000) (3,000)
Payments for investments in securities 0 (303,000)
All other investing activity 0 2,000
Net cash used for investing activities (8,000) (304,000)
Impact of exchange rates on cash 1,000 3,000
Net increase in cash and cash equivalents 318,000 47,000
Cash and cash equivalents, beginning of period 2,724,000 2,475,000
Cash and cash equivalents, end of period 3,042,000 2,522,000
Supplemental disclosures of cash flow information:    
Cash paid for interest 18,000 26,000
Cash paid for income taxes, net $ 2,000 $ 3,000