Consolidated Balance Sheets (March 31, 2013 Unaudited) (Parentheticals) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Marketable securities, common stock (in Dollars)	$ 112,348,000	$ 94,061,000
Marketable securities, bonds (in Dollars)	7,951,000	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 (in Shares)	5,000,000	5,000,000
Preferred stock, shares issued (in Shares)	0	0
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in Shares)	5,000,000	5,000,000
Common stock, shares outstanding (in Shares)	1,380,746	1,380,746