Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Sep. 30, 2020	$ 45,523	$ 5,916	$ 10,736	$ 42,339	$ (13,468)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	3,646			(743)	4,389
Performance and restricted share expense	469		469
Share transactions under employee stock plans	(16)	71	(87)
Ending balance at Sep. 30, 2021	49,622	5,987	11,118	41,596	(9,079)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(9,254)			(9,640)	386
Performance and restricted share expense	428		428
Share transactions under employee stock plans	(106)	53	(159)
Ending balance at Sep. 30, 2022	$ 40,690	$ 6,040	$ 11,387	$ 31,956	$ (8,693)