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Note 11. Shareholder's Equity (Detail) - Summary of Option and Warrant Activity and Outstanding Shares (USD $)
 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2012
Jul. 31, 2007
Outstanding, 2,280,204 2,345,705    
Outstanding, Stock Options, Weighted Average Exercise Price (in Dollars per share) $ 1.00 $ 1.01    
Outstanding, Stock Warrants 207,000 302,000    
Outstanding, Stock Warrants, Weighted Average Exercise Price (in Dollars per Item) 4.13 5.58 1.40 7.50
Granted, Stock Options 2,094,667 692,000    
Granted, Stock Options, Weighted Average Exercise Price (in Dollars per share) $ 0.80 $ 1.20    
Granted, Stock Warrants 217,931 114,000    
Granted, Stock Warrants, Weighted Average Exercise Price (in Dollars per Item) 1.40 1.47    
Exercised, Stock Options (157,921) (117,999)    
Exercised, Stock Options, Weighted Average Exercise Price (in Dollars per share) $ 0.84 $ 1.03    
Exercised, Stock Warrants   0    
Exercised, Stock Warrants, Weighted Average Exercise Price (in Dollars per Item)   0    
Forfeited or expired, Stock Options (1,227,330) (639,502)    
Forfeited or expired, Weighted Average Exercise Price (in Dollars per share) $ 1.00 $ 1.24    
Forfeited or expired, Stock Warrants (93,000) (209,000)    
Forfeited or expired, Stock Warrants, Weighted Average Exercise Price (in Dollars per Item) 7.39 4.71    
Outstanding, 2,989,620 2,280,204    
Outstanding, Stock Options, Weighted Average Exercise Price (in Dollars per share) $ 0.86 $ 1.00    
Outstanding, Stock Warrants 331,931 207,000    
Outstanding, Stock Warrants, Weighted Average Exercise Price (in Dollars per Item) 1.42 4.13 1.40 7.50