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EXCEL - IDEA: XBRL DOCUMENT - GENCOR INDUSTRIES INCFinancial_Report.xls
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EX-32.1 - CERTIFICATION - GENCOR INDUSTRIES INCd402869dex321.htm
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v2.4.0.6
Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 30, 2012
Sep. 30, 2011
Marketable securities, cost $ 80,568,000 $ 76,275,000
Account receivable, allowance for doubtful accounts $ 368,000 $ 582,000
Preferred stock, par value $ 0.10 $ 0.10
Preferred stock, shares authorized 300,000 300,000
Preferred stock, shares issued      
Common stock, par value $ 0.10 $ 0.10
Common stock, shares authorized 15,000,000 15,000,000
Common stock, shares issued 8,008,632 8,008,632
Common stock, shares outstanding 8,008,632 8,008,632
Class B Stock
   
Common stock, par value $ 0.10 $ 0.10
Common stock, shares authorized 6,000,000 6,000,000
Common stock, shares issued 1,509,238 1,509,238
Common stock, shares outstanding 1,509,238 1,509,238