Statements of Comprehensive Income - USD ($)	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 3,598,000	$ 2,546,000
Unrealized gain (loss) on securities:
Unrealized holding gains (losses) arising during period	265,000	1,351,000
Less: reclassification adjustment for (gains) losses included in net income	(2,424,000)	(321,000)
Income tax expense related to other comprehensive income	(76,000)	(20,000)
Other Comprehensive Income (Loss)	(2,235,000)	1,010,000
Comprehensive Income	$ 1,363,000	$ 3,556,000