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, 2021	$ 85,634	$ 143		$ 126,380	$ 14	$ (40,903)
Beginning 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		13,994,000
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ (8,486)					(8,486)
Translation adjustment	975				975
Stock compensation expense	1,530			1,530
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes	(111)	$ 1		(112)
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes (in shares)		58,000
Stock options exercised	85			85
Stock options exercised (in shares)		15,000
Ending balance at Sep. 30, 2024	$ 82,358	$ 143		$ 128,466	$ (720)	$ (45,531)
Ending balance (in shares) at Sep. 30, 2024	14,258,879	14,259,000