CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Dec. 31, 2020	Sep. 30, 2020
Statement Of Financial Position [Abstract]
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	13,727,971	13,670,639
Common stock, shares outstanding	13,610,334	13,670,639
Treasury stock, shares	117,637