Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Shares	Additional Paid-In Capital	Retained Earnings	Total accumulated other comprehensive loss
Beginning balance (in shares) at Sep. 30, 2017		5,596
Beginning balance at Sep. 30, 2017	$ 50,132	$ 5,596	$ 9,519	$ 44,267	$ (9,250)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive loss	(4,196)			(4,481)	285
Performance and restricted share expense	435		435
Share transactions under equity based plans (in shares)		95
Share transactions under equity based plans	(9)	$ 95	(104)
Ending balance (in shares) at Jun. 30, 2018		5,691
Ending balance at Jun. 30, 2018	46,362	$ 5,691	9,850	39,786	(8,965)
Beginning balance (in shares) at Mar. 31, 2018		5,691
Beginning balance at Mar. 31, 2018	48,595	$ 5,691	9,664	41,318	(8,078)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive loss	(2,419)			(1,532)	(887)
Performance and restricted share expense	186		186
Ending balance (in shares) at Jun. 30, 2018		5,691
Ending balance at Jun. 30, 2018	46,362	$ 5,691	9,850	39,786	(8,965)
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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive 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 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)