Net (Loss) Income Per Share Data - Denominator for Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net (loss) income available to common shareholders	$ (1,556)	$ 2,300
Basic weighted average shares outstanding	13,064	13,200
Dilutive effect of outstanding stock options, non-vested restricted stock, restricted stock units, deferred stock units and performance shares		246
Diluted weighted average shares outstanding	13,064	13,446