Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Reconciliation for Income Tax Expense Computed at Statutory Rate (Detail)

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Income Taxes - Schedule of Reconciliation for Income Tax Expense Computed at Statutory Rate (Detail) (USD $)
12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Effective Income Tax Rate Reconciliation [Line Items]      
Income tax expense at federal statutory rate, Amount $ 320,954 $ 324,101 $ (801,667)
Increases (decreases) in taxes resulting from:      
State income taxes, net of federal income tax benefit, Amount 117,290 104,465 (128,045)
Non-deductible expenses and other adjustments, Amount 40,286 32,975 236,627
Income tax expense (benefit) at effective rate $ 478,530 $ 461,541 $ (693,085)
Income tax expense at federal statutory rate 34.00% 34.00% 34.00%
State income taxes, net of federal income tax benefit 12.43% 10.96% 5.43%
Non-deductible expenses and other adjustments 4.26% 3.46% (10.04%)
Income tax expense (benefit) at effective rate 50.69% 48.42% 29.39%