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Impairment Of Long-Lived Assets (Details) (USD $)	6 Months Ended
Impairment Of Long-Lived Assets (Details) (USD $)	Jan. 31, 2015	Jan. 31, 2014
Impairment Of Long-Lived Assets [Abstract]
Impairment of long-lived assets	$ 0	$ 0

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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