Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Stock Options - Stock option expense (Details Narrative)

v2.4.0.8

Stock Options - Stock option expense (Details Narrative) (USD $)	3 Months Ended	12 Months Ended
	Jul. 31, 2009	Apr. 30, 2013	Apr. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding		311,575	290,983
Number of shares granted	8,333	41,667
Options expiration period	TEN YEARS AFTER DATE OF GRANT
Fair value of options	$ 121,000
Stock Options \| 2001 Incentive and Non-statutory Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares allowed for granting under the plan		300,000
Number of options outstanding		225,992
Number of shares granted		25,000
Stock Options \| 2001 Incentive and Non-statutory Stock Option Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting periods for options		1 year
Stock Options \| 2001 Incentive and Non-statutory Stock Option Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting periods for options		5 years
Stock Options \| 2011 Incentive and Non-statutory Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares allowed for granting under the plan		33,333
Nonqualified Stock Options \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration period		EXPIRE EITHER FIVE OR TEN YEARS AFTER DATE OF GRANT.
Nonqualified Stock Options \| Minimum \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting periods for options		1 year
Nonqualified Stock Options \| Maximum \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting periods for options		2 years

- Definition

No authoritative reference available.

+ References

No definition available.

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- Definition

Fair value portion of accrued expenses.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1)

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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

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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-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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