Consolidated Statements of Shareholders' Equity (USD $)	Total	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Common Stock [Member]	Class B Stock [Member]
Beginning balance at Sep. 30, 2012	$ 103,460,000	$ 10,049,000	$ 92,459,000	$ 801,000	$ 151,000
Beginning balance, shares at Sep. 30, 2012				8,008,632	1,509,238
Net Income	6,725,000		6,725,000
Stock-based compensation	243,000	243,000
Ending balance at Sep. 30, 2013	110,428,000	10,292,000	99,184,000	801,000	151,000
Ending balance, shares at Sep. 30, 2013				8,008,632	1,509,238
Net Income	3,473,000		3,473,000
Stock-based compensation	263,000	263,000
Stock options exercised	11,000	11,000
Stock options exercised, shares				1,500
Ending balance at Sep. 30, 2014	$ 114,175,000	$ 10,566,000	$ 102,657,000	$ 801,000	$ 151,000
Ending balance, shares at Sep. 30, 2014				8,010,132	1,509,238