Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Consolidated Balance Sheets [Abstract]
Trade, allowance	$ 944	$ 842
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	22,049,529	22,049,529
Common stock, shares outstanding	21,461,242	21,475,741
Treasury stock, shares	588,287	573,788