Consolidated Condensed Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Shares	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Adoption adjustment	Adoption adjustment Retained Earnings
Beginning balance (in shares) at Sep. 30, 2018		5,690
Beginning balance at Sep. 30, 2018	$ 44,189	$ 5,690	$ 10,031	$ 37,097	$ (8,629)	$ 3,598	$ 3,598
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(10,030)			(9,911)	(119)
Share retirement (in shares)		(21)
Share retirement	(62)	$ (21)		(41)
Performance and restricted share expense	367		367
Share transactions under equity based plans (in shares)		104
Share transactions under equity based plans	0	$ 104	(104)
Ending balance (in shares) at Jun. 30, 2019		5,773
Ending balance at Jun. 30, 2019	38,062	$ 5,773	10,294	30,743	(8,748)
Beginning balance (in shares) at Mar. 31, 2019		5,773
Beginning balance at Mar. 31, 2019	45,237	$ 5,773	10,353	38,113	(9,002)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(7,116)			(7,370)	254
Performance and restricted share expense	(59)		(59)
Ending balance (in shares) at Jun. 30, 2019		5,773
Ending balance at Jun. 30, 2019	38,062	$ 5,773	10,294	30,743	(8,748)
Beginning balance (in shares) at Sep. 30, 2019		5,777
Beginning balance at Sep. 30, 2019	36,054	$ 5,777	10,438	33,148	(13,309)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	4,969			4,168	801
Other	46		46
Performance and restricted share expense	262		262
Share transactions under equity based plans (in shares)		139
Share transactions under equity based plans	(8)	$ 139	(147)
Ending balance (in shares) at Jun. 30, 2020		5,916
Ending balance at Jun. 30, 2020	41,323	$ 5,916	10,599	37,316	(12,508)
Beginning balance (in shares) at Mar. 31, 2020		5,916
Beginning balance at Mar. 31, 2020	38,689	$ 5,916	10,516	35,066	(12,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	2,551			2,250	301
Other	46		46
Performance and restricted share expense	37		37
Ending balance (in shares) at Jun. 30, 2020		5,916
Ending balance at Jun. 30, 2020	$ 41,323	$ 5,916	$ 10,599	$ 37,316	$ (12,508)