Inventories Narrative (Details) - USD ($)	Oct. 31, 2015	Jul. 31, 2015
Inventory
Inventory obsolescence reserve	$ 496,000	$ 521,000

Amount of valuation reserve for inventory.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Balance Type:	credit
Period Type:	instant