Stock Compensation Information (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Jul. 31, 2015	Jul. 31, 2014	Apr. 30, 2015
Stock Compensation Information [Abstract]
Dividend payments	$ 0		$ 0
Dividend yield	0.00%	0.00%	0.00%
Unrecognized compensation expense	$ 300
Cost recognition, weighted-average period, years	3 years 4 days
Exercise of stock options, shares		0
Fair value of awards vested	$ 35	$ 27
Fair value of awards granted	$ 0	$ 100

Share-Based Compensation Arrangement By Share-Based Payment Award Options Granted In Period Weighted Average Fair Value

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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- References

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- Definition

The estimated amount of dividends to be paid to holders of the underlying shares (expected dividends) over the option's term. Dividends are taken into account because payment of dividends to shareholders reduces the fair value of the underlying shares, and option holders generally do not receive dividends.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Number of share options (or share units) exercised during the current period.

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