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Note 5. Stock-Based Compensation (Detail) (USD $)
0 Months Ended 3 Months Ended 9 Months Ended 132 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 165 Months Ended 9 Months Ended 165 Months Ended
Aug. 14, 2012
Apr. 12, 2010
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2009
Dec. 31, 2011
May 19, 2010
Restricted Stock [Member]
2009 Equity Incentive Plan [Member]
Sep. 30, 2012
Restricted Stock [Member]
Minimum [Member]
Sep. 30, 2012
Restricted Stock [Member]
Maximum [Member]
Sep. 30, 2012
Restricted Stock [Member]
Sep. 30, 2012
Restricted Stock [Member]
Sep. 30, 2011
Restricted Stock [Member]
Dec. 31, 2009
1998 Directors Stock Plan [Member]
Sep. 30, 2012
1999 Directors Stock Plan [Member]
Sep. 30, 2012
1999 Directors Stock Plan [Member]
Dec. 31, 2009
1999 Directors Stock Plan [Member]
Sep. 30, 2012
1999 Stock Incentive Plan [Member]
Sep. 30, 2012
1999 Stock Incentive Plan [Member]
Dec. 31, 2009
1999 Stock Incentive Plan [Member]
May 19, 2010
2009 Equity Incentive Plan [Member]
Maximum Number of Shares Allowed Per Year [Member]
May 19, 2010
2009 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                           600,000     1,975,000 3,200,000 3,200,000   1,000,000 4,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       1,475,000                       2,049,798            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period       337,516                       (697,782)            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights                             one              
Award Term                             10 years 10 years       10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures                                     2,892,500      
Percent FMV Common Stock Options Granted           100.00%                                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                 1 year 3 years               4 years        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized   2,000,000                                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number       2,530,500     1,448,016 1,039,000                           1,834,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)       $ 0.12                                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in Dollars)       $ 452,730                                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value (in Dollars)       130,110                                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value (in Dollars)       23,600                                    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)       445,500             26,100 26,100                    
Share-based Compensation (in Dollars) $ 100,950   $ 56,500 $ 320,000 $ 269,000           $ 104,200 $ 217,100 $ 169,400