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, 2020	$ 81,519	$ 141		$ 124,435	$ (646)	$ (42,411)
Beginning balance (in shares) at Sep. 30, 2020		14,063,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	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		14,304,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	17,367					17,367
Translation adjustment	(1,781)				(1,781)
Stock compensation expense	543			543
Repurchase of treasury stock	(4,115)		$ (4,115)
Repurchase of treasury stock (in shares)			(434,000)
Retirement of treasury stock		$ (4)	$ 4,115	(3,184)		(927)
Retirement of treasury stock (in shares)		(434,000)	434,000
Stock options exercised	720	$ 1		719
Stock options exercised (in shares)		124,000
Ending balance at Sep. 30, 2022	$ 98,368	$ 140		124,458	(1,767)	(24,463)
Ending balance (in shares) at Sep. 30, 2022	13,994,154	13,994,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ (12,582)					(12,582)
Translation adjustment	72				72
Stock compensation expense	1,272			1,272
Stock options exercised	1,235	$ 2		1,233
Stock options exercised (in shares)		192,000
Ending balance at Sep. 30, 2023	$ 88,365	$ 142		$ 126,963	$ (1,695)	$ (37,045)
Ending balance (in shares) at Sep. 30, 2023	14,185,977	14,186,000