Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Dec. 31, 2021	Sep. 30, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 939,000	$ 873,000
Allowance for doubtful notes receivable	91,000	91,000
Accumulated depreciation	$ 575,000	$ 556,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, authorized	10,000,000	10,000,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized	50,000,000	50,000,000
Common stock, issued	13,716,041	13,540,938
Common stock, outstanding	13,700,941	13,525,838
Treasury stock, shares	15,100	15,100