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Note 15 - Stock Plans (Tables)

12 Months Ended

Oct. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

					Weighted-Average						Weighted-Average						Weighted-Average
		October 31, 2015			Exercise Price			October 31, 2014			Exercise Price			October 31, 2013			Exercise Price
Options outstanding at beginning of period		6,720,251			$5.23			6,591,054			$5.74			6,019,070			$5.97
Granted		173,750			$2.47			376,822			$4.41			887,500			$6.28
Exercised		18,125			$2.48			42,375			$2.74			44,812			$2.67
Forfeited		203,436			$3.78			56,375			$2.66			76,500			$3.06
Expired		278,564			$15.04			148,875			$27.42			194,204			$16.92
Options outstanding at end of period		6,393,876			$4.78			6,720,251			$5.23			6,591,054			$5.74
Options exercisable at end of period		4,566,290						4,100,413						3,161,952

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

				Number			Weighted- Average			Weighted- Average Remaining Contractual
Range of Exercise Prices				Outstanding			Exercise Price			Life
$1.66	–	$5.00		4,515,001			$3.03			5.37
$5.01	–	$10.00		1,611,750			$6.36			5.29
$10.01	–	$20.00		-			$-			-
$20.01	–	$30.00		187,375			$21.78			1.59
$30.01	–	$40.00		79,750			$32.33			0.55
				6,393,876			$4.78			5.18

				Number			Weighted- Average			Weighted- Average Remaining Contractual
Range of Exercise Prices				Exercisable			Exercise Price			Life
$1.66	–	$5.00		3,432,415			$3.04			4.74
$5.01	–	$10.00		866,750			$6.44			3.28
$10.01	–	$20.00		-			$-			-
$20.01	–	$30.00		187,375			$21.78			1.59
$30.01	–	$40.00		79,750			$32.33			0.55
				4,566,290			$4.96			4.26

Schedule of Nonvested Share Activity [Table Text Block]

		Shares			Weighted-Average Grant Date Fair Value
Nonvested at beginning of period		2,459,138			$5.02
Granted		1,818,558			$2.66
Vested		626,190			$4.59
Forfeited		50,737			$5.53
Nonvested at end of period		3,600,769			$4.16

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Tabular disclosure of the changes in outstanding nonvested shares.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

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