Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29

-Article 5

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- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ 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 (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Adjusted by stock splits and stock dividends shares.

+ References

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- Definition

Adjusted for stock splits and stock dividends price.

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- Definition

Exercisable beneficial interest percentage.

+ References

No definition available.

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- Definition

Rights entitles stockholder to purchase for stock on exercise price.

+ References

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Stock-Based Compensation and Stockholders' Rights (Textual) (Details) (USD $)					12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Oct. 15, 1996	Oct. 15, 1996 Series A Junior Participating Cumulative Preferred Stock [Member]	Jan. 31, 2014 Restricted Stock or Stock Units [Member] 2007 Plan [Member]	Apr. 30, 2014 Restricted Stock or Stock Units [Member] 2007 Plan [Member]	Apr. 30, 2014 Restricted Stock or Stock Units [Member] 2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant of stock option or awards						1,000,000
Granted during the year					0
Stock available for future issuance						13,075	349,320
Rights entitles a stockholder to purchase for an exercise price			$ 50.00
Adjusted for stock splits and stock dividends, price			$ 20.70
Acquire a beneficial interest			20.00%
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.001
Preferred stock, shares				200,000
Adjusted by stock splits and stock dividends, Shares				483,153