Note I - Capital Stock (Details) (USD $)	12 Months Ended
Apr. 30, 2015	Apr. 30, 2014
Note I - Capital Stock (Details) [Line Items]
Preferred Stock, Shares Authorized	1,000,000us-gaap_PreferredStockSharesAuthorized	1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Subsidiaries [Member]
Note I - Capital Stock (Details) [Line Items]
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)	$ 1.00
Preferred Stock, Shares Issued	500,000
Preferred Stock, Dividend Rate, Percentage	8.00%
Preferred Stock, Right of Shareholder, Amount of Shares	400,000
Preferred Stock, Right to Shareholder, Value of Redeemed Stock (in Dollars) (in Dollars)	$ 400,000

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Number of shares of preferred stock that a shareholder can require to redeem.

+ References

No definition available.

+ Details

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- Definition

The redemption (or callable) amount of redeemable preferred stock, excluding currently redeemable preferred stock. Excludes amounts representing dividends not declared or paid.

+ References

No definition available.

+ Details

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

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- Definition

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

+ References

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

+ Details

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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

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- Definition

Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

+ References

+ Details

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