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Note 16 - Stock Plans (Tables) | 12 Months Ended
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Oct. 31, 2013
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, 2013 |  |  | Exercise Price |  |  | October 31, 2012 |  |  | Exercise Price |  |  | October 31, 2011 |  |  | Exercise Price |
Options outstanding at beginning of period |  |  | 6,019,070 |  |  |  | $5.97 |  |  |  | 5,094,367 |  |  |  | $7.05 |  |  |  | 6,316,860 |  |  |  | $8.72 |
Granted |  |  | 887,500 |  |  |  | $6.28 |  |  |  | 1,334,828 |  |  |  | $2.59 |  |  |  | 674,100 |  |  |  | $1.93 |
Exercised |  |  | 44,812 |  |  |  | $2.67 |  |  |  | 6,250 |  |  |  | $2.55 |  |  |  |  |  |  |  |  |
Forfeited |  |  | 76,500 |  |  |  | $3.06 |  |  |  | 94,808 |  |  |  | $4.77 |  |  |  | 238,499 |  |  |  | $7.33 |
Cancellations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,200,000 |  |  |  | $11.19 |
Expired |  |  | 194,204 |  |  |  | $16.92 |  |  |  | 309,067 |  |  |  | $9.61 |  |  |  | 458,094 |  |  |  | $11.57 |
Options outstanding at end of period |  |  | 6,591,054 |  |  |  | $5.74 |  |  |  | 6,019,070 |  |  |  | $5.97 |  |  |  | 5,094,367 |  |  |  | $7.05 |
Options exercisable at end of period |  |  | 3,161,952 |  |  |  |  |  |  |  | 2,467,170 |  |  |  |  |  |  |  | 1,764,338 |  |  |  |  |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
Range of Exercise Prices |  | Number Outstanding |  |  | Weighted- Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |
$1.93 | – | $5.00 |  |  | 4,405,679 |  |  |  | $2.95 |  |  |  | 7.07 |
$5.01 | – | $10.00 |  |  | 1,701,500 |  |  |  | $6.37 |  |  |  | 7.27 |
$10.01 | – | $20.00 |  |  | - |  |  |  | $- |  |  |  | - |
$20.01 | – | $30.00 |  |  | 241,500 |  |  |  | $21.70 |  |  |  | 3.66 |
$30.01 | – | $40.00 |  |  | 197,375 |  |  |  | $32.53 |  |  |  | 1.77 |
$40.01 | – | $50.00 |  |  | 10,000 |  |  |  | $41.45 |  |  |  | 0.25 |
$50.01 | – | $60.00 |  |  | 30,000 |  |  |  | $54.70 |  |  |  | 1.42 |
$60.01 | – | $70.00 |  |  | 5,000 |  |  |  | $60.36 |  |  |  | 1.67 |
|  |  |  |  | 6,591,054 |  |  |  | $5.74 |  |  |  | 6.80 |
Range of Exercise Prices |  | Number Exercisable |  |  | Weighted- Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |
$1.93 | – | $5.00 |  |  | 1,864,077 |  |  |  | $3.14 |  |  |  | 6.18 |
$5.01 | – | $10.00 |  |  | 814,000 |  |  |  | $6.46 |  |  |  | 4.67 |
$10.01 | – | $20.00 |  |  | - |  |  |  | $- |  |  |  | - |
$20.01 | – | $30.00 |  |  | 241,500 |  |  |  | $21.70 |  |  |  | 3.66 |
$30.01 | – | $40.00 |  |  | 197,375 |  |  |  | $32.53 |  |  |  | 1.77 |
$40.01 | – | $50.00 |  |  | 10,000 |  |  |  | $41.45 |  |  |  | 0.25 |
$50.01 | – | $60.00 |  |  | 30,000 |  |  |  | $54.70 |  |  |  | 1.42 |
$60.01 | – | $70.00 |  |  | 5,000 |  |  |  | $60.36 |  |  |  | 4.83 |
|  |  |  |  | 3,161,952 |  |  |  | $7.95 |  |  |  | 5.26 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  | Shares |  |  | Weighted-Average Grant Date Fair Value |
Nonvested at beginning of period |  |  | 2,128,005 |  |  |  | $4.49 |
Granted |  |  | 1,377,120 |  |  |  | $5.63 |
Vested |  |  | (979,462 | ) |  |  | $4.58 |
Forfeited |  |  | (62,016 | ) |  |  | $4.61 |
Nonvested at end of period |  |  | 2,463,647 |  |  |  | $5.10 |

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