Stock-based Compensation and Stockholders’ Equity - Stock Options Outstanding and Exercisable (Details) - USD ($)	12 Months Ended
	May 29, 2022	May 30, 2021	May 31, 2020
Options Outstanding
Options outstanding, beginning balance (in shares)	1,834,017	1,716,358	2,000,096
Options granted (in shares)	803,000	682,600	435,000
Options exercised (in shares)	(161,415)	0	(163,333)
Options forfeited and canceled (in shares)	(205,746)	(127,714)	(55,806)
Options expired (in shares)	(322,170)	(437,227)	(499,599)
Options outstanding, ending balance (in shares)	1,947,686	1,834,017	1,716,358
Options exercisable (in shares)	986,594
Weighted-Average Exercise Price Per Share
Options outstanding, beginning balance (in dollars per share)	$ 11.07	$ 12.15	$ 12.94
Options granted (in dollars per share)	11.79	9.66	10.42
Options exercised (in dollars per share)	9.69	0	11.16
Options forfeited and canceled (in dollars per share)	10.96	9.93	13.08
Options expires (in dollars per share)	13.31	13.42	14.04
Options outstanding, ending balance (in dollars per share)	11.13	$ 11.07	$ 12.15
Options exercisable (in dollars per share)	$ 10.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Total Intrinsic Value of Options Exercised	$ 304,211	$ 0	$ 169,066
Weighted average remaining contractual term, options outstanding	4 years 8 months 19 days
Weighted average remaining contractual term, options exercisable	3 years 8 months 23 days
Aggregate intrinsic value, options outstanding	$ 310,682
Aggregate intrinsic value, options exercisable	$ 195,247