Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v2.4.1.9
Consolidated Balance Sheets (Parenthetical) (USD $)
Nov. 30, 2014
Nov. 30, 2013
Allowance for doubtful accounts $ 2,967,668us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,081,278us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Reserve for inventory obsolescence $ 992,296us-gaap_InventoryValuationReserves $ 3,030,306us-gaap_InventoryValuationReserves
Preferred stock, par value (usd per share) $ 1us-gaap_PreferredStockParOrStatedValuePerShare $ 1us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock shares authorized 20,000,000us-gaap_PreferredStockSharesAuthorized 20,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common stock    
Common stock, par value (usd per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
$ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Common stock shares authorized 15,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
15,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Common stock shares issued 6,038,982us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
6,038,982us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Common stock shares outstanding 6,038,982us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
6,038,982us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Common Class A    
Common stock, par value (usd per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
$ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common stock shares authorized 5,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
5,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common stock shares issued 967,702us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
967,702us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common stock shares outstanding 967,702us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
967,702us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember