Consolidated Balance Sheets (Parentheticals) - $ / shares $ / shares in Thousands	Sep. 30, 2017	Sep. 30, 2016
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common Class A [Member]
Class of common stock, par value (in dollars per share)	$ 0	$ 0
Class of common stock, shares authorized (in shares)	10,000,000	10,000,000
Class of common stock, shares issued (in shares)	2,130,681	2,090,349
Treasury shares (in shares)	15,795	15,795
Common Class B [Member]
Class of common stock, par value (in dollars per share)	$ 0	$ 0
Class of common stock, shares authorized (in shares)	2,500,000	2,500,000
Class of common stock, shares issued (in shares)	779,283	779,283
Treasury shares (in shares)	5,776	667