Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income/(Loss)
Balance (in shares) at Sep. 30, 2020		12,422			(806)
Balance at Sep. 30, 2020	$ 306,626	$ 124	$ 61,998	$ 294,016	$ (24,999)	$ (24,513)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(364)			(364)
Foreign currency translation adjustments	4,349					4,349
Stock-based compensation (in shares)		59
Stock-based compensation	894	$ 1	893
Shares withheld in lieu of employee tax withholding	(632)		(632)
Dividends	(3,028)			(3,028)
Balance (in shares) at Dec. 31, 2020		12,481			(806)
Balance at Dec. 31, 2020	307,845	$ 125	62,259	290,624	$ (24,999)	(20,164)
Balance (in shares) at Sep. 30, 2021		12,498			(806)
Balance at Sep. 30, 2021	301,223	$ 125	63,948	282,505	$ (24,999)	(20,356)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,846)			(2,846)
Foreign currency translation adjustments	54					54
Stock-based compensation (in shares)		72
Stock-based compensation	1,008	$ 1	1,007
Shares withheld in lieu of employee tax withholding	(660)		(660)
Dividends	(3,200)		69	(3,269)
Balance (in shares) at Dec. 31, 2021		12,570			(806)
Balance at Dec. 31, 2021	$ 295,579	$ 126	$ 64,364	$ 276,390	$ (24,999)	$ (20,302)