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Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Per Share data, unless otherwise specified	Oct. 31, 2013	Apr. 30, 2013
Allowance for doubtful accounts (in Dollars)	$ 298	$ 288
Preferred stock, par value (in Dollars per share)	$ 1.00	$ 1.00
Common stock par value (in Dollars per share)	$ 1.00	$ 1.00
Common stock, shares issued (in Shares)	9,164	9,164
Treasury stock, shares (in Shares)	635	701

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount or stated value per share of common stock.

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