| 
           2. Summary of Significant Accounting Policies (Tables)
  
         | 
        12 Months Ended | 
      
      
        | 
           Dec. 31, 2012 
         | 
      
      
        | Accounting Policies [Abstract] | 
         
 | 
      
      
        | Inventories Table | 
        
    |   | 
      | 
    December 31, | 
      | 
 
    |   | 
      | 
    2012 | 
      | 
      | 
    2011 | 
      | 
 
    | Raw materials | 
      | 
    $ | 
    183,655 | 
      | 
      | 
    $ | 
    193,121 | 
      | 
 
    | Finished goods | 
      | 
      | 
    789,707 | 
      | 
      | 
      | 
    875,892 | 
      | 
 
    | Inventory reserve | 
      | 
      | 
    (50,000 | 
    ) | 
      | 
      | 
    - | 
      | 
 
    | Total | 
      | 
    $ | 
    923,362 | 
      | 
      | 
    $ | 
    1,069,013 | 
      | 
 
 
 | 
      
      
        | Customer Concentration | 
        
 The following table illustrates the
level of concentration of the below two groups within revenue as a percentage of total revenues during the years ended December
31, 2012 and 2011: 
  
    |   | 
      | 
    For the Year Ended | 
      | 
 
    |   | 
      | 
    December 31, | 
      | 
 
    |   | 
      | 
    2012 | 
      | 
      | 
    2011 | 
      | 
 
    | Top Five Customers | 
      | 
      | 
    50 | 
    % | 
      | 
      | 
    37 | 
    % | 
 
    | Federal Agencies | 
      | 
      | 
    41 | 
    % | 
      | 
      | 
    26 | 
    % | 
 
 
  
The following table illustrates the
level of concentration of the below two groups within accounts receivable as a percentage of total accounts receivable balance
as of December 31, 2012 and 2011: 
  
    |   | 
      | 
    For the Year Ended | 
      | 
 
    |   | 
      | 
    December 31, | 
      | 
 
    |   | 
      | 
    2012 | 
      | 
      | 
    2011 | 
      | 
 
    | Top Five Customers | 
      | 
      | 
    34 | 
    % | 
      | 
      | 
    89 | 
    % | 
 
    | Federal Agencies | 
      | 
      | 
    32 | 
    % | 
      | 
      | 
    42 | 
    % | 
 
 
 | 
      
      
        | Computation of Loss per Share | 
        
    |   | 
      | 
    For the Year Ended | 
      | 
 
    |   | 
      | 
    December 31, | 
      | 
 
    |   | 
      | 
    2012 | 
      | 
      | 
    2011 | 
      | 
 
    | Numerator: | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Net loss | 
      | 
    $ | 
    (3,450,205 | 
    ) | 
      | 
    $ | 
    (2,996,312 | 
    ) | 
 
    | Accrued interest on convertible debt, after tax | 
      | 
      | 
    - | 
      | 
      | 
      | 
    18,896 | 
      | 
 
    | Accrued dividend for Preferred Stock paid in common stock | 
      | 
      | 
    (278,184 | 
    ) | 
      | 
      | 
    (164,904 | 
    ) | 
 
    | Deemed dividend on warrant modifications | 
      | 
      | 
    (190,891 | 
    ) | 
      | 
      | 
    (704,844 | 
    ) | 
 
    | Issuance of common stock for dividends paid in kind | 
      | 
      | 
    (284,116 | 
    ) | 
      | 
      | 
    - | 
      | 
 
    | Beneficial conversion feature for preferred stock | 
      | 
      | 
    - | 
      | 
      | 
      | 
    (1,006,574 | 
    ) | 
 
    | Series A Preferred dividends paid in  common stock | 
      | 
      | 
    - | 
      | 
      | 
      | 
    (188,380 | 
    ) | 
 
    | Preferred dividends accrued and paid in cash | 
      | 
      | 
    (196,819 | 
    ) | 
      | 
      | 
    (65,543 | 
    ) | 
 
    | Net loss applicable to common shareholders | 
      | 
    $ | 
    (4,400,215 | 
    ) | 
      | 
    $ | 
    (5,107,661 | 
    ) | 
 
    |   | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Denominator for basic and diluted loss per share: | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Weighted average  common shares outstanding | 
      | 
      | 
    10,113,881 | 
      | 
      | 
      | 
    6,618,484 | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Loss per common share - basic and diluted | 
      | 
    $ | 
    (0.44 | 
    ) | 
      | 
    $ | 
    (0.77 | 
    ) | 
 
 
  
    |   | 
      | 
    For the Year Ended | 
      | 
 
    |   | 
      | 
    December 31, | 
      | 
 
    |   | 
      | 
    2012 | 
      | 
      | 
    2011 | 
      | 
 
    | Stock options | 
      | 
      | 
    1,605,750 | 
      | 
      | 
      | 
    1,508,500 | 
      | 
 
    | Convertible debt | 
      | 
      | 
    - | 
      | 
      | 
      | 
    412,000 | 
      | 
 
    | Common stock warrants | 
      | 
      | 
    6,687,099 | 
      | 
      | 
      | 
    4,775,501 | 
      | 
 
    | Preferred stock warrants | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Convertible preferred stock: | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Series A Convertible Preferred | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Series B Convertible Preferred | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Series C Convertible Preferred | 
      | 
      | 
    - | 
      | 
      | 
      | 
    880,980 | 
      | 
 
    | Series D Convertible Preferred | 
      | 
      | 
    750,000 | 
      | 
      | 
      | 
    1,143,077 | 
      | 
 
    | Series E Convertible Preferred | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Series G Convertible Preferred | 
      | 
      | 
    1,453,200 | 
      | 
      | 
      | 
    - | 
      | 
 
    |   | 
      | 
      | 
    10,496,049 | 
      | 
      | 
      | 
    8,720,058 | 
      | 
 
 
 | 
      
      
        | Stock based compensation expense | 
        
    |   | 
      | 
    
         For the Year Ended 
        December 31, 
 | 
      | 
 
    |   | 
      | 
    2012 | 
      | 
      | 
    2011 | 
      | 
 
    | Research and development | 
      | 
    $ | 
    30,034 | 
      | 
      | 
    $ | 
    39,375 | 
      | 
 
    | Selling and marketing | 
      | 
      | 
    28,944 | 
      | 
      | 
      | 
    43,201 | 
      | 
 
    | General and administrative | 
      | 
      | 
    74,215 | 
      | 
      | 
      | 
    39,398 | 
      | 
 
    | Total stock-based compensation expense | 
      | 
    $ | 
    133,193 | 
      | 
      | 
    $ | 
    121,974 | 
      | 
 
 
 | 
      
      
        | Liabilities measured at fair value on recurring basis | 
        
   
    |   | 
      | 
      | 
      | 
      | 
    Fair value measurements at December 31, 2012 using: | 
      | 
 
    |   | 
      | 
    December 31, 2012 | 
      | 
      | 
    Quoted prices in active markets (Level 1) | 
      | 
      | 
    Significant other observable inputs (Level 2) | 
      | 
      | 
    
         Significant unobservable inputs 
        (Level 3) 
 | 
      | 
 
    | Series D Common Stock Purchase Warrants | 
      | 
    $ | 
    160,812 | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    160,812 | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
 
  
    |   | 
      | 
      | 
      | 
      | 
    Fair value measurements at December 31, 2011 using: | 
      | 
 
    |   | 
      | 
    December 31, 2011 | 
      | 
      | 
    Quoted prices in active markets (Level 1) | 
      | 
      | 
    Significant other observable inputs (Level 2) | 
      | 
      | 
    
         Significant unobservable inputs 
        (Level 3) 
 | 
      | 
 
    | Series C Common Stock Purchase Warrants | 
      | 
    $ | 
    205,353 | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    205,353 | 
      | 
 
    | Series D Common Stock Purchase Warrants | 
      | 
      | 
    231,200 | 
      | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
      | 
      | 
    231,200 | 
      | 
 
    |   | 
      | 
    $ | 
    436,553 | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    436,553 | 
      | 
 
 
  
    |   | 
      | 
    January 1, 2012 | 
      | 
      | 
    Change in Fair Value | 
      | 
      | 
    Reclass to Equity | 
      | 
      | 
    December 31, 2012 | 
      | 
 
    | Series C Common Stock Purchase Warrants | 
      | 
    $ | 
    205,353 | 
      | 
      | 
    $ | 
    (74,452 | 
    ) | 
      | 
    $ | 
    (130,901 | 
    ) | 
      | 
    $ | 
    - | 
      | 
 
    | Series D Common Stock Purchase Warrants | 
      | 
      | 
    231,200 | 
      | 
      | 
      | 
    (70,388 | 
    ) | 
      | 
      | 
    - | 
      | 
      | 
      | 
    160,812 | 
      | 
 
    |   | 
      | 
    $ | 
    436,553 | 
      | 
      | 
    $ | 
    (144,840 | 
    ) | 
      | 
    $ | 
    (130,901 | 
    ) | 
      | 
    $ | 
    160,812 | 
      | 
 
 
  
    |   | 
      | 
    January 1, 2011 | 
      | 
      | 
    Change in Fair Value | 
      | 
      | 
    December 31, 2011 | 
      | 
 
    | Series C Common Stock Purchase Warrants | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    205,353 | 
      | 
      | 
    $ | 
    205,353 | 
      | 
 
    | Series D Common Stock Purchase Warrants | 
      | 
      | 
    - | 
      | 
      | 
      | 
    231,200 | 
      | 
      | 
      | 
    231,200 | 
      | 
 
    |   | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    436,553 | 
      | 
      | 
    $ | 
    436,553 | 
      | 
 
 
 | 
      
      
        | Fair value assumptions | 
        
   
The following table summarizes the assumptions
we utilized for grants of stock options to the three sub-groups of our stock option recipients during the twelve months ended December
31, 2012 and 2011: 
  
    | Assumptions | 
      | 
    Non-Employee Board Members | 
      | 
      | 
    CEO, other Officers and Employees | 
      | 
 
    | Expected life | 
      | 
    2.0-5.0 (yrs) | 
      | 
      | 
    6.0 (yrs) | 
      | 
 
    | Expected volatility | 
      | 
      | 
    55.66%-101.54 | 
    % | 
      | 
      | 
    55.66%-124.89 | 
    % | 
 
    | Risk-free interest rate | 
      | 
      | 
    1.00%-4.94 | 
    % | 
      | 
      | 
    0.50%-4.94 | 
    % | 
 
    | Forfeiture rate | 
      | 
      | 
    0.00%-5.00 | 
    % | 
      | 
      | 
    2.00%-5.00 | 
    % | 
 
    | Expected dividend yield | 
      | 
      | 
    0.0 | 
    % | 
      | 
      | 
    0.0 | 
    % | 
 
 
  
Assumptions for re-pricing of the options
were: 
  
    | Assumptions | 
      | 
    Awards re-priced during the year ended December 31, 2012 | 
      | 
 
    | Expected life (in years) | 
      | 
      | 
    6 | 
      | 
 
    | Weighted average expected volatility | 
      | 
      | 
    124.9 | 
    % | 
 
    | Risk-free interest rate | 
      | 
      | 
    0.7 | 
    % | 
 
    | Weighted average re-priced Black-Scholes calculated fair value | 
      | 
      | 
    0.32 | 
      | 
 
 
 |