Balance Sheets (unaudited) (Parenthetical) - USD ($)	Jun. 30, 2026	Sep. 30, 2025
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit losses	$ 37,000	$ 29,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	1,800	1,800
Common stock, shares issued	1,774	1,774
Common stock, shares outstanding	1,774	1,774