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Note 15 - Stock Plans (Tables)

12 Months Ended

Oct. 31, 2019

Notes Tables

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

		October 31, 2019			Weighted- Average Exercise Price			October 31, 2018			Weighted- Average Exercise Price			October 31, 2017			Weighted- Average Exercise Price
Options outstanding at beginning of period		278,569			$73.76			274,423			$85.22			294,950			$100.80
Granted		110,975			$9.44			37,825			$56.30			9,450			$58.47
Exercised		-			$-			1,210			$49.91			1,930			$51.85
Forfeited		2,038			$53.96			2,000			$64.25			18,093			$146.28
Expired		56,025			$64.41			30,469			$156.95			9,954			$416.94
Options outstanding at end of period		331,481			$53.93			278,569			$73.76			274,423			$85.22
Options exercisable at end of period		147,019						191,748						210,360

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

								Number			Weighted- Average			Weighted- Average Remaining Contractual
Range of Exercise Prices								Outstanding			Exercise Price			Life
	$7.85	–	$38.50					111,575			$9.60			9.61
	$38.75	–	$60.25					102,530			$50.00			5.26
	$61.00	–	$110.25					65,197			$73.55			4.99
	$118.25	–	$157.00					52,179			$131.91			1.67
								331,481			$53.93			6.11

								Number			Weighted- Average			Weighted- Average Remaining Contractual
Range of Exercise Prices								Exercisable			Exercise Price			Life
	$7.85	–	$38.50					300			$38.50			6.66
	$38.75	–	$60.25					52,029			$48.59			3.28
	$61.00	–	$110.25					42,511			$79.75			3.13
	$118.25	–	$157.00					52,179			$131.91			1.67
								147,019			$87.15			2.67

Schedule of Nonvested Share Activity [Table Text Block]

		October 31, 2019			Weighted-Average Grant Date Fair Value			October 31, 2018			Weighted-Average Grant Date Fair Value			October 31, 2017			Weighted-Average Grant Date Fair Value
Nonvested Time-Based at beginning of period		105,594			$61.77			96,091			$60.50			100,300			$63.70
Granted		164,050			$7.66			37,888			$54.95			32,349			$60.31
Vested		21,329			$45.52			22,821			$55.19			15,511			$75.78
Forfeited		17,106			$86.96			5,564			$20.87			21,047			$64.30
Nonvested Time-Based at end of period		231,210			$23.01			105,594			$61.77			96,091			$60.50

		October 31, 2019			Weighted-Average Grant Date Fair Value			October 31, 2018			Weighted-Average Grant Date Fair Value			October 31, 2017			Weighted-Average Grant Date Fair Value
Nonvested Performance-Based at beginning of period		101,407			$69.28			150,881			$50.26			189,275			$64.43
Granted		56,400			$10.10			47,277			$70.41			17,000			$70.88
Vested		8,655			$42.69			5,390			$72.52			33,147			$148.05
Forfeited		12,836			$93.31			91,361			$38.27			22,247			$40.84
Nonvested Performance-Based at end of period		136,316			$44.22			101,407			$69.28			150,881			$50.26

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