Consolidated Balance Sheets (June 30, 2013 Unaudited) (Parentheticals) (USD $)	Jun. 30, 2013	Sep. 30, 2012
Marketable securities, common stock (in Dollars)	$ 121,104,000	$ 94,061,000
Marketable securities, bonds (in Dollars)	7,317,000	8,095,000
Accounts receivable, allowance for doubtful accounts (in Dollars)	$ 250,000	$ 200,000
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