CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balances, Beginning at Oct. 31, 2014	$ 164,645	$ 651	$ 55,974	$ 111,580	$ (3,560)
Balances, Beginning (Shares) at Oct. 31, 2014		6,508,880
Net income	16,214	$ 0	0	16,214	0
Other comprehensive income (loss)	(5,826)	0	0	0	(5,826)
Exercise of common stock options	$ 257	$ 1	256	0	0
Exercise of common stock options (Shares)	15,300	15,300
Stock-based compensation expense	$ 1,193	$ 3	1,190	0	0
Stock-based compensation expense (Shares)		27,538
Tax benefit (expense) from stock option activities	119	$ 0	119	0	0
Dividends paid	(2,034)	0	0	(2,034)	0
Balances, Ending at Oct. 31, 2015	174,568	$ 655	57,539	125,760	(9,386)
Balances, Ending (Shares) at Oct. 31, 2015		6,551,718
Net income	13,292	$ 0	0	13,292	0
Other comprehensive income (loss)	(1,657)	0	0	0	(1,657)
Exercise of common stock options	$ 0	$ 0	0	0	0
Exercise of common stock options (Shares)	0	0
Stock-based compensation expense	$ 1,607	$ 2	1,605	0	0
Stock-based compensation expense (Shares)		21,385
Tax benefit (expense) from stock option activities	(25)	$ 0	(25)	0	0
Dividends paid	(2,310)	0	0	(2,310)	0
Balances, Ending at Oct. 31, 2016	185,475	$ 657	59,119	136,742	(11,043)
Balances, Ending (Shares) at Oct. 31, 2016		6,573,103
Net income	15,115	$ 0	0	15,115	0
Other comprehensive income (loss)	2,853	0	0	0	2,853
Exercise of common stock options	$ 534	$ 3	531	0	0
Exercise of common stock options (Shares)	29,164	29,164
Stock-based compensation expense	$ 1,698	$ 4	1,694	0	0
Stock-based compensation expense (Shares)		38,930
Dividends paid	(2,590)	$ 0	0	(2,590)	0
Balances, Ending at Oct. 31, 2017	$ 203,085	$ 664	$ 61,344	$ 149,267	$ (8,190)
Balances, Ending (Shares) at Oct. 31, 2017		6,641,197