Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Oct. 31, 2018	$ 199,522	$ 234	$ 114,405	$ 135,813	$ (50,930)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(6,295)	0	0	(6,295)	0
Other comprehensive income, net of tax	(3,682)	0	0	0	(3,682)
Restricted stock and exercise of stock options	0	4	(4)	0	0
Accounts Receivable, Credit Loss Expense (Reversal)	329
Stock-based compensation cost	(1,576)	0	(1,576)	0	0
Ending Balance at Jul. 31, 2019	191,121	238	115,977	129,518	(54,612)
Beginning Balance at Apr. 30, 2019	195,153	238	115,391	132,227	(52,703)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(2,709)	0	0	(2,709)	0
Other comprehensive income, net of tax	(1,909)	0	0	0	(1,909)
Accounts Receivable, Credit Loss Expense (Reversal)	3
Stock-based compensation cost	(586)	0	(586)	0	0
Ending Balance at Jul. 31, 2019	191,121	238	115,977	129,518	(54,612)
Beginning Balance at Oct. 31, 2019	167,514	238	116,436	115,866	(65,026)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(199,522)	0	0	(199,522)	0
Other comprehensive income, net of tax	8,744	0	0	0	8,744
Restricted stock and exercise of stock options	(2)	5	(7)	0	0
Accounts Receivable, Credit Loss Expense (Reversal)	2,535
Stock-based compensation cost	(1,386)	0	(1,386)	0	0
Ending Balance at Jul. 31, 2020	(21,880)	243	117,815	(83,656)	(56,282)
Beginning Balance at Apr. 30, 2020	100,818	243	117,551	53,478	(70,454)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(137,134)	0	0	(137,134)	0
Other comprehensive income, net of tax	14,172	0	0	0	14,172
Accounts Receivable, Credit Loss Expense (Reversal)	1,993
Stock-based compensation cost	(264)	0	(264)	0	0
Ending Balance at Jul. 31, 2020	$ (21,880)	$ 243	$ 117,815	$ (83,656)	$ (56,282)