Condensed Consolidated Statements of Shareholders' Equity - USD ($)	Total	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Common Stock [Member] Common Stock [Member]	Class B common stock [Member] Common Stock [Member]
Beginning balance at Sep. 30, 2024	$ 196,141,000	$ 12,590,000	$ 182,085,000	$ 1,234,000	$ 232,000
Beginning balance, shares at Sep. 30, 2024				12,338,845	2,318,857
Net Income (Loss)	3,817,000		3,817,000
Ending balance at Dec. 31, 2024	199,958,000	12,590,000	185,902,000	$ 1,234,000	$ 232,000
Ending balance, shares at Dec. 31, 2024				12,338,845	2,318,857
Beginning balance at Sep. 30, 2025	211,802,000	12,590,000	197,746,000	$ 1,234,000	$ 232,000
Beginning balance, shares at Sep. 30, 2025				12,338,845	2,318,857
Net Income (Loss)	3,442,000		3,442,000
Ending balance at Dec. 31, 2025	$ 215,244,000	$ 12,590,000	$ 201,188,000	$ 1,234,000	$ 232,000
Ending balance, shares at Dec. 31, 2025				12,338,845	2,318,857