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Derivative Instruments (Tables) | 12 Months Ended
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Jul. 31, 2015
Derivative Instruments [Abstract] |
Schedule of derivative instruments outstanding contracts |
Settlement Date |  | U.S. Dollar Amount |  |  | NOK Amount |
September 2015 |  |  | 750,000 |  |  |  | 6,163,000 |
November 2015 |  |  | 2,729,000 |  |  |  | 22,169,000 |
January 2016 |  |  | 3,000,000 |  |  |  | 24,257,000 |
May 2016 |  |  | 1,000,000 |  |  |  | 8,239,000 |
July 2016 |  |  | 1,000,000 |  |  |  | 8,200,000 |
Schedule of derivative assets fair value |
July 31 (in thousands) |  |  |  | 2015 |  |  | 2014 |
Asset Derivatives |  | Balance Sheet Location |  |  |  |  |  |
Derivatives not designated or not qualifying as hedging instruments: |  |  |  |  |  |  |  |  |  |
Foreign exchange forwards |  | Other current assets |  | $ | 38 |  |  | $ | — |
Schedule of derivative liability fair value |
July 31 (in thousands) |  |  |  | 2015 |  |  | 2014 |
Liability Derivatives |  | Balance Sheet Location |  |  |  |  |  |
Derivatives not designated or not qualifying as hedging instruments: |  |  |  |  |  |  |  |  |  |
Foreign exchange forwards |  | Other current liabilities |  | $ | 39 |  |  | $ | — |
Schedule of derivative instruments on the consolidated statements of operations |
|  |  |  | Amount of Gain (Loss) Recognized on Derivatives |
|  |  |  | Year ended July 31, |
(in thousands) |  | 2015 |  |  | 2014 |  |  | 2013 |
Derivatives not designated or not qualifying as hedging instruments |  | Location of Gain (Loss) Recognized on Derivatives |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange forwards |  | Other (expense) income, net |  | $ | (58 | ) |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of derivative liabilities at fair value. + References No definition available. + Details
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- Definition Tabular disclosure of derivative instruments (including nonderivative instruments that are designated and qualify as hedging instruments) of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure of the presentation of foreign exchange contracts on the statement of financial position, including the fair value amounts and location of such amounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
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