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Consolidated Statements of Cash Flows (Unaudited) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Operating activities:    
Net loss $ (263,000) $ (229,000)
Adjustments to reconcile net loss to net cash provided by (used for) operating activities:    
Depreciation and amortization 39,000 49,000
Provision for sales returns and doubtful accounts 1,000 6,000
Stock based compensation 7,000 6,000
Changes in assets and liabilities:    
Trade accounts receivable 40,000 377,000
Inventory 332,000 352,000
Prepaid expenses and other current assets (47,000) (46,000)
Trade accounts payable (135,000) (1,000)
Accrued liabilities (53,000) (64,000)
Other assets and liabilities 1,000 (6,000)
Total adjustments 185,000 673,000
Net cash (used for) provided by operating activities (78,000) 444,000
Investing activities:    
All other investing activity 1,000 (2,000)
Net cash provided by (used for) investing activities 1,000 (2,000)
Impact of exchange rates on cash 1,000 (1,000)
Net (decrease) increase in cash and cash equivalents (76,000) 441,000
Cash and cash equivalents, beginning of period 2,724,000 2,475,000
Cash and cash equivalents, end of period 2,648,000 2,916,000
Supplemental disclosures of cash flow information:    
Cash paid for interest 9,000 13,000
Cash paid for income taxes, net $ 2,000 $ 3,000