Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 27, 2021	Feb. 29, 2020	Feb. 27, 2021	Feb. 29, 2020
Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net profit (loss)	$ 13,548	$ 13,771	$ 6,304	$ (42,136)
Other comprehensive income (loss), before tax:
Unrealized holding loss on available-for-sale securities, net of reclassification adjustments	(378)	(38)	(283)	(863)
Income tax benefit related to items of other comprehensive income	92	9	69	210
Other comprehensive loss, net of tax	(286)	(29)	(214)	(653)
Comprehensive income (loss)	13,262	13,742	6,090	(42,789)
Less: Comprehensive income (loss) attributable to the noncontrolling interest	0	22	0	(64)
Comprehensive income (loss) attributable to Cal-Maine Foods, Inc.	$ 13,262	$ 13,720	$ 6,090	$ (42,725)