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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Apr. 30, 2013
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance	$ 407	$ 278
Property and equipment, accumulated depreciation	$ 4,714	$ 5,526

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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