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Consolidated Statements Of Stockholders' Equity (USD $)
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Sep. 30, 2009 $ 306 $ 82,947,945 $ (74,904,164) $ 8,044,087
Balance, shares at Sep. 30, 2009 30,552,498      
Cumulative-effect of change in accounting principle   (2,246,980) 1,499,063 (747,917)
Issuance of common stock:        
Upon exercise of stock options   30,417   30,417
Upon exercise of stock options, shares 62,291      
Share-based compensation expense   479,771   479,771
Warrant extension   1,725   1,725
Separation of Parametric Sound Corporation   (454,006)   (454,006)
Net income for the period     2,983,613 2,983,613
Balance at Sep. 30, 2010 306 80,758,872 (70,421,488) 10,337,690
Balance, shares at Sep. 30, 2010 30,614,789      
Issuance of common stock:        
Upon exercise of stock options 2 145,448   145,450
Upon exercise of stock options, shares 131,765      
Upon exercise of warrants (net of non-cash offering costs of $2,164,773) 16 2,181,824   2,181,840
Upon exercise of warrants (net of non-cash offering costs of $2,164,773), shares 1,627,945      
Issuance of warrants   2,164,773   2,164,773
Share-based compensation expense   422,643   422,643
Net income for the period     5,022,902 5,022,902
Balance at Sep. 30, 2011 $ 324 $ 85,673,560 $ (65,398,586) $ 20,275,298
Balance, shares at Sep. 30, 2011 32,374,499