Condensed Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 518,000	$ 567,000
Unrealized gain (loss) on securities:
Unrealized holding gains (losses) arising during period	629,000	545,000
Reclassification adjustment for gains (losses) included in net income	(84,000)	(18,000)
Income tax expense related to other comprehensive income	(228,000)	(220,000)
Other Comprehensive Income (Loss)	317,000	307,000
Comprehensive Income	$ 835,000	$ 874,000