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Consolidated Statements of Stockholders' Equity - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balances (in shares) at Sep. 30, 2014 33,236,489        
Balances at Sep. 30, 2014 $ 332 $ 88,049,125 $ (59,346,666) $ 28,702,791
Share-based compensation expense 619,201 $ 619,201
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 396,042       396,042
Issuance of common stock upon exercise of stock options, net $ 4 504,367 $ 504,371
Repurchase of common stock (in shares) (734,070)       (734,070)
Repurchase of common stock $ (7) (1,564,659) $ (1,564,666)
Other comprehensive loss (301) (301)
Net income 9,687,816 9,687,816
Balances (in shares) at Sep. 30, 2015 32,898,461        
Balances at Sep. 30, 2015 $ 329 87,608,034 (49,658,850) (301) $ 37,949,212
Issuance of common stock upon exercise of stock options, net (in shares) 396,042       396,042
Share-based compensation expense 605,426 $ 605,426
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 1,250       1,250
Issuance of common stock upon exercise of stock options, net 2,200 $ 2,200
Repurchase of common stock (in shares) (1,099,608)       (1,099,608)
Repurchase of common stock $ (11) (1,748,445) $ (1,748,456)
Other comprehensive loss (1,248) (1,248)
Net income (1,281,599) (1,281,599)
Balances (in shares) at Sep. 30, 2016 31,800,103        
Balances at Sep. 30, 2016 $ 318 86,467,215 (51,895,099) (1,549) $ 34,570,885
Issuance of common stock upon exercise of stock options, net (in shares) 1,250       1,250
Common stock cash dividends $ (954,650) $ (954,650)