Investments - Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands	Jul. 30, 2022	Apr. 30, 2022
Summary of investments
Gross Unrealized  Gains	$ 2,682	$ 2,726
Gross Unrealized  Losses	(800)	(895)
Fair Value	48,965	51,537
Equity securities
Summary of investments
Gross Unrealized  Gains	1,415	1,448
Gross Unrealized  Losses	(95)	(86)
Fair Value	13,909	13,905
Fixed income
Summary of investments
Gross Unrealized  Gains	39	28
Gross Unrealized  Losses	(705)	(809)
Fair Value	30,944	33,521
Other
Summary of investments
Gross Unrealized  Gains	1,228	1,250
Gross Unrealized  Losses	0	0
Fair Value	$ 4,112	$ 4,111