Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2025	Sep. 30, 2024
Allowance for credit losses	$ 151,000	$ 117,000
Accrued liabilities	$ 3,140,000	$ 4,615,000
Serial preferred shares, shares authorized (in shares)	1,000,000	1,000,000
Serial preferred shares, shares issued (in shares)	0	0
Serial preferred shares, shares outstanding (in shares)	0	0
Common shares, par value (in dollars per share)	$ 1	$ 1
Common shares, shares authorized (in shares)	10,000,000	10,000,000
Common shares, shares issued (in shares)	6,180,000	6,158,000
Common shares, shares outstanding (in shares)	6,180,000	6,158,000
Director
Accrued liabilities	$ 0	$ 880,000