Consolidated Balance Sheets (Parentheticals) (USD $)	Sep. 30, 2011	Sep. 30, 2010
Marketable securities, including common stock (in Dollars)	$ 48,393,000	$ 43,005,000
Marketable securities, including bonds (in Dollars)	7,723,000	7,077,000
Accounts receivable, allowance for doubtful accounts (in Dollars)	$ 250,000	$ 300,000
Preferred stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares outstanding	1,380,746	1,380,746