Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)
Beginning balance at Sep. 30, 2019	$ 87,452	$ 143		$ 125,098	$ (11,233)	$ (26,556)
Beginning balance (in shares) at Sep. 30, 2019		14,269,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(1,932)					(1,932)
Translation adjustment	2,673				2,673
Stock compensation expense	68			68
Stock options exercised	701	$ 1		700
Stock options exercised (in shares)		117,000
Ending balance at Dec. 31, 2019	88,962	$ 144		125,866	(8,560)	(28,488)
Ending balance (in shares) at Dec. 31, 2019		14,386,000
Beginning balance at Sep. 30, 2019	87,452	$ 143		125,098	(11,233)	(26,556)
Beginning balance (in shares) at Sep. 30, 2019		14,269,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(13,626)
Ending balance at Mar. 31, 2020	82,157	$ 140		124,145	(1,814)	(40,314)
Ending balance (in shares) at Mar. 31, 2020		14,041,000
Beginning balance at Dec. 31, 2019	88,962	$ 144		125,866	(8,560)	(28,488)
Beginning balance (in shares) at Dec. 31, 2019		14,386,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(11,694)					(11,694)
Translation adjustment	6,746				6,746
Stock compensation expense	65			65
Stock repurchases	$ (2,000)		$ (2,000)
Stock repurchases (in shares)	(366,000)		(366,000)
Retirement of stock repurchases		$ (4)	$ 2,000	(1,864)		(132)
Retirement of stock repurchases (in shares)		(366,000)	366,000
Stock options exercised	$ 78			78
Stock options exercised (in shares)		21,000
Ending balance at Mar. 31, 2020	82,157	$ 140		124,145	(1,814)	(40,314)
Ending balance (in shares) at Mar. 31, 2020		14,041,000
Beginning balance at Sep. 30, 2020	$ 81,519	$ 141		124,435	(646)	(42,411)
Beginning balance (in shares) at Sep. 30, 2020	14,063,172	14,063,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ 719					719
Translation adjustment	595				595
Stock compensation expense	65			65
Stock options exercised	135			135
Stock options exercised (in shares)		28,000
Ending balance at Dec. 31, 2020	83,033	$ 141		124,635	(51)	(41,692)
Ending balance (in shares) at Dec. 31, 2020		14,091,000
Beginning balance at Sep. 30, 2020	$ 81,519	$ 141		124,435	(646)	(42,411)
Beginning balance (in shares) at Sep. 30, 2020	14,063,172	14,063,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ 473
Ending balance at Mar. 31, 2021	$ 83,441	$ 142		125,513	(276)	(41,938)
Ending balance (in shares) at Mar. 31, 2021	14,221,865	14,222,000
Beginning balance at Dec. 31, 2020	$ 83,033	$ 141		124,635	(51)	(41,692)
Beginning balance (in shares) at Dec. 31, 2020		14,091,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(246)					(246)
Translation adjustment	(225)				(225)
Stock compensation expense	$ 84			84
Stock repurchases (in shares)	0
Stock options exercised	$ 795	$ 1		794
Stock options exercised (in shares)		131,000
Ending balance at Mar. 31, 2021	$ 83,441	$ 142		$ 125,513	$ (276)	$ (41,938)
Ending balance (in shares) at Mar. 31, 2021	14,221,865	14,222,000