Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Jul. 31, 2012	Jul. 31, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 1,776	$ 2,076
Other comprehensive income (loss), net of tax:
Change in unrealized gains on securities, net of taxes	27	(49)
Other comprehensive income (loss)	27	(49)
Comprehensive income	$ 1,803	$ 2,027

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References+ Details

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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Reference 16: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

Net of tax amount of the appreciation (loss) in value of unsold available-for-sale securities attributable to the parent entity. Excludes amounts related to other than temporary impairment (OTTI) losses.

+ References

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

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+ Details