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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2012 | Jul. 31, 2012 | Apr. 30, 2012 | Jan. 31, 2012 | Oct. 31, 2011 | Jul. 31, 2011 | Apr. 30, 2011 | Jan. 31, 2011 | Oct. 31, 2012 | Oct. 31, 2011 | Oct. 31, 2010
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 35,420 | $ 29,693 | $ 24,153 | $ 31,337 | $ 34,723 | $ 31,160 | $ 28,607 | $ 28,080 | $ 120,603 | [1] | $ 122,570 | [1] | $ 69,777 | [1]
UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |  |  |
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 26,929 |  | 66,531 |  | 28,764 |
south korea [Domain] |  |  |  |  |  |  |  |  |  |  |  |  |  |
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 92,163 |  | 53,256 |  | 40,148 |
UNITED KINGDOM |  |  |  |  |  |  |  |  |  |  |  |  |  |
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,061 |  | 1,639 |  | 0 |
INDONESIA |  |  |  |  |  |  |  |  |  |  |  |  |  |
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 147 |  | 675 |  | 0 |
GERMANY |  |  |  |  |  |  |  |  |  |  |  |  |  |
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 128 |  | 290 |  | 681 |
CANADA |  |  |  |  |  |  |  |  |  |  |  |  |  |
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 175 |  | 156 |  | 136 |
JAPAN |  |  |  |  |  |  |  |  |  |  |  |  |  |
schedule of revenues by geographic area [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 0 |  | $ 23 |  | $ 48 |
[1] | (1) Includes revenue from a related party. Refer to Concentrations in note 1 to the financial statements.

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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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