Condensed Statement of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Income Statement [Abstract]
Net Income	$ 161,000	$ 4,447,000	$ 3,595,000	$ 7,799,000
Unrealized gain (loss)on debt securities:
Unrealized holding gains (losses)arising during period	(94,000)	59,000	(144,000)	189,000
Income tax benefit (expense) related to other comprehensive income	27,000	(17,000)	41,000	(56,000)
Other Comprehensive Income (Loss)	(67,000)	42,000	(103,000)	133,000
Comprehensive Income	$ 94,000	$ 4,489,000	$ 3,492,000	$ 7,932,000