Consolidated Balance Sheet (Parentheticals) (USD $)	Sep. 30, 2011	Sep. 30, 2010
Accounts receivable, allowance (in Dollars)	$ 10,000	$ 10,000
Inventories, allowance (in Dollars)	714,000	380,000
Current [Member]
Deferred income taxes, valuation allowance (in Dollars)	270,100	156,300
Noncurrent [Member]
Deferred income taxes, valuation allowance (in Dollars)	$ 3,779,200	$ 3,637,400
Common Class A [Member]
Common shares - par value (in Dollars per share)	$ 1.00	$ 1.00
Common shares - shares authorized	3,750,000	3,750,000
Common shares - shares issued	809,024	809,024
Common shares - shares outstanding	809,024	809,024
Treasury shares	15,795	15,795
Common Class B [Member]
Common shares - par value (in Dollars per share)	$ 1.00	$ 1.00
Common shares - shares authorized	1,000,000	1,000,000
Common shares - shares issued	475,533	475,533
Common shares - shares outstanding	475,533	475,533
Treasury shares	20,667	20,667