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Property, Plant and Equipment | 12 Months Ended
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Oct. 31, 2014
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment | Note 5. Property, Plant and Equipment Property, plant and equipment at October 31, 2014 and 2013 consisted of the following:
| 2014 |  | 2013 |  | Estimated Useful Life
Land |  | $ | 524 |  |  | $ | 524 |  |  | —
Building and improvements |  | 9,117 |  |  | 8,679 |  |  | 10-26 years
Machinery, equipment and software |  | 75,868 |  |  | 73,051 |  |  | 3-8 years
Furniture and fixtures |  | 2,955 |  |  | 2,899 |  |  | 10 years
Power plants for use under PPAs |  | 996 |  |  | 8,216 |  |  | 3-10 years
Construction in progress |  | 10,534 |  |  | 9,537 |  |  |
|  | 99,994 |  |  | 102,906 |  |  |
Less: Accumulated depreciation |  | (73,385 | ) |  | (78,681 | ) |  |
Property, plant and equipment, net |  | $ | 26,609 |  |  | $ | 24,225 |  |  |
Depreciation expense was $4.4 million, $4.1 million and $5.2 million for the years ended October 31, 2014, 2013 and 2012, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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