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Consolidated Condensed Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Statement Of Other Comprehensive Income [Abstract]
Net income	$ 2,119	$ 2,036
Other comprehensive income (loss), net of tax:
Change in unrealized gains on securities, net of taxes	(92)	(85)
Other comprehensive income (loss)	(92)	(85)
Comprehensive income	$ 2,027	$ 1,951

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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