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Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Statutory Accounting Practices [Line Items]          
Cash balance $ 50   $ 50   $ 50
Payment period     90 days    
Interest charged on past due accounts     0   0
Allowance for doubtful accounts 42   42   49
Inventory reserve 59   59   38
Impairment losses for long-lived assets 0 0 0 0  
Depreciation and amortization expense 48 68 168 223  
Capitalized software development costs 0 0 0 0  
Research and development expenses 271 462 794 1,417  
Total stock-based compensation expenses 94 99 341 377  
Tax benefit recorded due to full valuation allowance on deferred tax assets 0 0 0 0  
Forfeiture rate to options granted to members of board of directors     0.00%    
Stock-based compensation expense related to fair market value of stock and warrant $ 0 $ 14 $ 10 $ 223  
Warrant [Member]
          
Statutory Accounting Practices [Line Items]          
Shares reserved for outstanding stock warrants and options 1,203 1,203 1,203 1,203  
Stock Option [Member]
          
Statutory Accounting Practices [Line Items]          
Shares reserved for outstanding stock warrants and options 543 543 543 543  
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    
Pre-vesting forfeiture rate based on upon actual historical experience for all employee option awards     25.20%