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, 2019	9,462,267
Balance at Oct. 31, 2019	$ 95	$ 21,949	$ 9,489	$ 31,533
Exercise of stock options (in shares)	228,870
Exercise of stock options	$ 2	421	0	423
Stock-based compensation expense	0	206	0	206
Consolidated net income	$ 0	0	(158)	(158)
Issuance of restricted stock (in shares)	54,850
Issuance of restricted stock	$ 1	(1)	0	0
Dividends	$ 0	0	(388)	(388)
Issuance of common shares (in shares)	12,075
Issuance of common shares	$ 0	77	0	77
Balance (in shares) at Apr. 30, 2020	9,758,062
Balance at Apr. 30, 2020	$ 98	22,652	8,943	31,693
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	$ 0	32	0	32
Stock-based compensation expense	0	96	0	96
Consolidated net income	0	0	(184)	(184)
Dividends	$ 0	0	(195)	(195)
Balance (in shares) at Apr. 30, 2020	9,758,062
Balance at Apr. 30, 2020	$ 98	22,652	8,943	31,693
Balance (in shares) at Oct. 31, 2020	9,814,118
Balance at Oct. 31, 2020	$ 98	22,946	9,020	$ 32,064
Exercise of stock options (in shares)	156,701			156,701
Exercise of stock options	$ 1	484	0	$ 485
Stock-based compensation expense	$ 0	260	0	260
Tax withholding related to vesting of restricted stock (in shares)	(2,279)
Tax withholding related to vesting of restricted stock	$ 0	(11)	0	(11)
Consolidated net income	$ 0	0	4,442	4,442
Issuance of restricted stock (in shares)	36,834
Issuance of restricted stock	$ 1	(1)	0	0
Forfeiture of restricted stock (in shares)	(4,318)
Forfeiture of restricted stock	$ 0	0	0	0
Balance (in shares) at Apr. 30, 2021	10,001,056
Balance at Apr. 30, 2021	$ 100	23,678	13,462	37,240
Balance (in shares) at Jan. 31, 2021	9,962,456
Balance at Jan. 31, 2021	$ 100	23,441	8,617	32,158
Exercise of stock options (in shares)	38,512
Exercise of stock options	$ 0	100	0	100
Stock-based compensation expense	$ 0	137	0	137
Tax withholding related to vesting of restricted stock (in shares)	88
Tax withholding related to vesting of restricted stock	$ 0	0	0	0
Consolidated net income	$ 0	0	4,845	4,845
Balance (in shares) at Apr. 30, 2021	10,001,056
Balance at Apr. 30, 2021	$ 100	$ 23,678	$ 13,462	$ 37,240