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Note 15 - Stock Plans (Tables)

12 Months Ended

Oct. 31, 2021

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

		October 31,				Weighted-Average				October 31,				Weighted-Average				October 31,				Weighted-Average
		2021				Exercise Price				2020				Exercise Price				2019				Exercise Price
Options outstanding at beginning of period			289,391			$	47.02				331,481			$	53.93				278,569			$	73.76
Granted			-			$	-				-			$	-				110,975			$	9.44
Exercised			77,607			$	35.30				-			$	-				-			$	-
Forfeited			1,650			$	14.80				6,560			$	26.24				2,038			$	53.96
Expired			3,900			$	48.03				35,530			$	115.28				56,025			$	64.41
Options outstanding at end of period			206,234			$	51.67				289,391			$	47.02				331,481			$	53.93
Options exercisable at end of period			125,528								145,553								147,019

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

										Weighted-
										Average
						Weighted-				Remaining
		Number				Average				Contractual
Range of Exercise Prices		Outstanding				Exercise Price				Life
$7.85 – $38.75			74,387			$	9.51				7.56
$42.50 – $63.75			74,701			$	54.14				5.07
$66.75 – $100.25			32,500			$	71.60				0.74
$110.25 – $157.00			24,646			$	145.15				1.83
			206,234			$	51.67				4.90

										Weighted-
										Average
						Weighted-				Remaining
		Number				Average				Contractual
Range of Exercise Prices		Exercisable				Exercise Price				Life
$7.85 – $38.75			19,464			$	9.52				7.39
$42.50 – $63.75			48,918			$	51.74				4.30
$66.75 – $100.25			32,500			$	71.60				0.74
$110.25 – $157.00			24,646			$	145.15				1.83
			125,528			$	68.68				3.37

Schedule of Nonvested Share Activity [Table Text Block]

		October 31,				Weighted-Average Grant Date				October 31,				Weighted-Average Grant Date				October 31,				Weighted-Average Grant Date
		2021				Fair Value				2020				Fair Value				2019				Fair Value
Nonvested Time-Based at beginning of period			288,865			$	19.88				231,210			$	23.01				105,594			$	61.77
Granted			50,187			$	85.72				142,231			$	19.48				164,050			$	7.66
Vested			104,253			$	24.33				62,309			$	17.04				21,329			$	45.52
Forfeited			4,875			$	26.84				22,267			$	57.81				17,106			$	86.96
Nonvested Time-Based at end of period			229,924			$	26.51				288,865			$	19.88				231,210			$	23.01

		October 31,				Weighted-Average Grant Date				October 31,				Weighted-Average Grant Date				October 31,				Weighted-Average Grant Date
		2021				Fair Value				2020				Fair Value				2019				Fair Value
Nonvested Performance-Based at beginning of period			294,472			$	24.64				136,316			$	44.22				101,407			$	69.28
Granted			104,467			$	72.68				183,825			$	15.11				56,400			$	10.10
Vested			47,002			$	68.52				4,284			$	57.22				8,655			$	42.69
Forfeited			954			$	67.00				21,385			$	70.44				12,836			$	93.31
Nonvested Performance-Based at end of period			350,983			$	35.60				294,472			$	24.64				136,316			$	44.22

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Tabular disclosure of the changes in outstanding nonvested shares.

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