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Benefit Plans (Tables) | 12 Months Ended
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Oct. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] | Share-based compensation was reflected in the consolidated statements of operations as follows (in thousands):
|  | 2016 |  | 2015 |  | 2014
Cost of revenues |  | $ | 745 |  |  | $ | 769 |  |  | $ | 751 |
General and administrative expense |  | 2,110 |  |  | 1,990 |  |  | 1,718 |
Research and development expense |  | 504 |  |  | 360 |  |  | 436 |
|  | $ | 3,359 |  |  | $ | 3,119 |  |  | $ | 2,905 |
Schedule of Assumptions Used [Table Text Block] | The fair value of stock options is estimated on the grant date using the Black-Scholes option valuation model and the following weighted-average assumptions:
|  | 2016 |  | 2015 |  | 2014
Expected life (in years) |  | 7.0 |  |  | 7.0 |  |  | 7.0 |
Risk free interest rate |  | 1.5 | % |  | 1.7 | % |  | 2.3 | %
Volatility |  | 80.1 | % |  | 80.3 | % |  | 81.1 | %
Dividend yield |  | — | % |  | — | % |  | — | %
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | The following table summarizes our stock option activity for the year ended October 31, 2016:
|  |  |  | Weighted- Average Option
Options |  | Shares |  | Price
Outstanding at October 31, 2015 |  | 257,769 |  |  | $ | 57.89 |
Granted |  | 24,310 |  |  | $ | 6.44 |
Canceled |  | (35,156 | ) |  | $ | 113.31 |
Outstanding at October 31, 2016 |  | 246,923 |  |  | $ | 44.88 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] | The following table summarizes information about stock options outstanding and exercisable at October 31, 2016:
|  | Options Outstanding |  | Options Exercisable
|  |  |  | Weighted Average |  | Weighted Average |  |  |  | Weighted Average
Range of |  | Number |  | Remaining |  | Exercise |  | Number |  | Exercise
Exercise Prices |  | outstanding |  | Contractual Life |  | Price |  | exercisable |  | Price
$3.24 — $61.20 |  | 165,498 |  |  | 6.2 |  | $ | 18.78 |  |  | 154,421 |  |  | $ | 19.49 |
$61.21 — $119.04 |  | 76,205 |  |  | 0.9 |  | $ | 96.40 |  |  | 76,205 |  |  | $ | 96.40 |
$119.05 — $176.88 |  | 5,220 |  |  | 0.9 |  | $ | 120.28 |  |  | 5,220 |  |  | $ | 120.28 |
|  | 246,923 |  |  | 4.5 |  | $ | 44.88 |  |  | 235,846 |  |  | $ | 46.57 |
Schedule of Other Share-based Compensation, Activity [Table Text Block] | The following table summarizes our RSA and RSU activity for the year ended October 31, 2016:
|  |  |  | Weighted- Average
Restricted Stock Awards and Units |  | Shares |  | Price
Outstanding at October 31, 2015 |  | 483,570 |  |  | 16.67 |
Granted |  | 704,153 |  |  | 6.40 |
Vested |  | 182,738 |  |  | 16.11 |
Forfeited |  | 14,950 |  |  | 13.21 |
Outstanding at October 31, 2016 |  | 990,035 |  |  | 9.52 |

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in other outstanding share-based compensation awards other than stock options or nonvested awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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