Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Oct. 31, 2018	9,291,201
Balance at Oct. 31, 2018	$ 93	$ 20,974	$ 6,716	$ 27,783
Exercise of stock options (in shares)	69,150
Exercise of stock options	$ 1	356		357
Stock-based compensation expense		192		192
Dividends			(373)	(373)
Consolidated net income (loss)			1,701	1,701
Balance (in shares) at Apr. 30, 2019	9,360,351
Balance at Apr. 30, 2019	$ 94	21,522	8,044	29,660
Balance (in shares) at Jan. 31, 2019	9,356,935
Balance at Jan. 31, 2019	$ 94	21,429	7,170	28,693
Exercise of stock options (in shares)	3,416
Exercise of stock options		15		15
Stock-based compensation expense		78		78
Dividends			(187)	(187)
Consolidated net income (loss)			1,061	1,061
Balance (in shares) at Apr. 30, 2019	9,360,351
Balance at Apr. 30, 2019	$ 94	21,522	8,044	29,660
Balance (in shares) at Oct. 31, 2019	9,462,267
Balance at Oct. 31, 2019	$ 95	21,949	9,489	$ 31,533
Exercise of stock options (in shares)	228,870			228,870
Exercise of stock options	$ 2	421		$ 423
Stock-based compensation expense		206		206
Dividends			(388)	(388)
Consolidated net income (loss)			(158)	(158)
Balance (in shares) at Apr. 30, 2020	9,758,062
Balance at Apr. 30, 2020	$ 98	22,652	8,943	31,693
Issuance of restricted stock (in shares)	54,850
Issuance of restricted stock	$ 1	(1)
Issuance of common shares (in shares)	12,075
Issuance of common shares		77		77
Balance (in shares) at Jan. 31, 2020	9,745,135
Balance at Jan. 31, 2020	$ 98	22,524	9,322	31,944
Exercise of stock options (in shares)	12,927
Exercise of stock options		32		32
Stock-based compensation expense		96		96
Dividends			(195)	(195)
Consolidated net income (loss)			(184)	(184)
Balance (in shares) at Apr. 30, 2020	9,758,062
Balance at Apr. 30, 2020	$ 98	$ 22,652	$ 8,943	$ 31,693