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Nature Of Operations And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Statutory Accounting Practices [Line Items]      
Cash balance $ 50   $ 50
Interest charged on past due accounts 0    
Allowance for doubtful accounts 37   35
Inventory reserve 52   85
Impairment losses for long-lived assets 0 0  
Depreciation and amortization expense 41 61  
Research and development expenses 224 318  
Shares reserved for outstanding stock warrants and options 2,496 1,247  
Stock-based compensation expenses 84 159  
Tax benefit recorded due to full valuation allowance on deferred tax assets 0 0  
Board Of Directors [Member]
      
Statutory Accounting Practices [Line Items]      
Pre-vesting forfeiture rate based on upon actual historical experience for all employee option awards 0.00%    
Vendors [Member]
      
Statutory Accounting Practices [Line Items]      
Stock-based compensation expenses $ 10 $ 10  
Minimum [Member]
      
Statutory Accounting Practices [Line Items]      
Term of maintenance contract 1 year    
Pre-vesting forfeiture rate based on upon actual historical experience for all employee option awards 18.30%    
Maximum [Member]
      
Statutory Accounting Practices [Line Items]      
Term of maintenance contract 3 years    
Payment period 90 days    
Pre-vesting forfeiture rate based on upon actual historical experience for all employee option awards 24.20%