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Consolidated Balance Sheets (USD $)
Sep. 30, 2011
Sep. 30, 2010
ASSETS    
Cash and cash equivalents $ 1,715,000 $ 3,004,000
Marketable securities at fair value (Cost of $76,275,000 at September 30, 2011 and $70,089,000 at September 30, 2010) 72,486,000 73,327,000
Account receivable, less allowance for doubtful accounts of $582,000 at September 30, 2011 and $1,803,000 at September 30, 2010 1,573,000 1,979,000
Costs and estimated earnings in excess of billings 4,450,000 580,000
Inventories, net 12,878,000 17,341,000
Deferred income taxes 690,000 660,000
Prepaid expenses 1,632,000 2,205,000
Total current assets 95,424,000 99,096,000
Property and equipment, net 8,349,000 7,773,000
Other assets 602,000 358,000
Total assets 104,375,000 107,227,000
LIABILITIES AND SHAREHOLDERS' EQUITY    
Account payable 1,978,000 1,373,000
Customer deposits 756,000 1,478,000
Accrued expenses 2,842,000 3,323,000
Total current liabilities 5,576,000 6,174,000
Deferred and other income taxes   2,525,000
Total liabilities 5,576,000 8,699,000
Commitments and contingencies      
Shareholder's equity:    
Preferred stock, par value $.10 share; authorized 300,000 shares; none issued      
Common stock 801,000 810,000
Capital in excess of par value 9,860,000 10,542,000
Common stock held in treasury, at cost; 95,000 shares at September 30, 2010   (738,000)
Retained earnings 87,987,000 87,763,000
Total shareholder's equity 98,799,000 98,528,000
Total Liabilities and Shareholder's Equity 104,375,000 107,227,000
Class B Stock [Member]
    
Shareholder's equity:    
Common stock $ 151,000 $ 151,000