Net (Loss) Income Per Share Data - Calculation of Diluted Weighted Average Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Basic weighted average shares outstanding	13,837	13,601	13,740	13,577
Dilutive effect of outstanding stock options, non-vested restricted stock, and non-vested restricted stock units		185	219	198
Diluted weighted average shares outstanding	13,837	13,786	13,959	13,775