Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Deficit
Beginning balance at Sep. 30, 2018	$ 93,090	$ 142		$ 124,316	$ (9,974)	$ (21,394)
Beginning balance (in shares) at Sep. 30, 2018		14,217,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,162)					(5,162)
Translation adjustment	(1,259)				(1,259)
Stock compensation expense	573			573
Stock options exercised	210	$ 1		209
Stock options exercised (in shares)		52,000
Ending balance at Sep. 30, 2019	87,452	$ 143		125,098	(11,233)	(26,556)
Ending balance (in shares) at Sep. 30, 2019		14,269,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(15,723)					(15,723)
Translation adjustment	10,587				10,587
Stock compensation expense	326			326
Repurchase of treasury stock	(2,000)		$ (2,000)
Repurchase of treasury stock (in shares)			(366,000)
Retirement of treasury stock		$ (4)	$ 2,000	(1,864)		(132)
Retirement of treasury stock (in shares)		(366,000)	366,000
Stock options exercised	877	$ 2		875
Stock options exercised (in shares)		160,000
Ending balance at Sep. 30, 2020	$ 81,519	$ 141		124,435	(646)	(42,411)
Ending balance (in shares) at Sep. 30, 2020	14,063,172	14,063,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,508					1,508
Translation adjustment	660				660
Stock compensation expense	401			401
Stock options exercised	1,546	$ 2		1,544
Stock options exercised (in shares)		241,000
Ending balance at Sep. 30, 2021	$ 85,634	$ 143		$ 126,380	$ 14	$ (40,903)
Ending balance (in shares) at Sep. 30, 2021	14,304,492	14,304,000