Calculation of Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Aug. 27, 2022	Aug. 28, 2021
Numerator for Basic and Diluted Earnings Per Share:
Net income (loss)	$ 6,324	$ 2,635
Undistributed earnings, Basic	5,505	1,849
Undistributed earnings, Diluted	$ 5,505	$ 1,849
Denominator for Basic and Diluted Earnings Per Share:
Effect of dilutive securities dilutive stock options	616	273
Weighted Average Number of Shares Outstanding, Diluted	12,331	11,467
Basic
Numerator for Basic and Diluted Earnings Per Share:
Net income (loss)	$ 6,324	$ 2,635
Diluted
Numerator for Basic and Diluted Earnings Per Share:
Net income (loss)	6,324	2,635
Common Stock
Numerator for Basic and Diluted Earnings Per Share:
Undistributed earnings, Basic	4,755	1,582
Undistributed earnings, Diluted	$ 4,788	$ 1,588
Denominator for Basic and Diluted Earnings Per Share:
Weighted Average Number of Shares Outstanding, Basic	11,715	11,194
Weighted Average Number of Shares Outstanding, Diluted	12,331	11,467
Net income per share:
Earnings Per Share, Basic	$ 0.47	$ 0.20
Earnings Per Share, Diluted	$ 0.45	$ 0.20
Common Stock | Basic
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	$ 709	$ 673
Common Stock | Diluted
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	709	673
Common Class B
Numerator for Basic and Diluted Earnings Per Share:
Undistributed earnings, Basic	750	267
Undistributed earnings, Diluted	$ 717	$ 261
Denominator for Basic and Diluted Earnings Per Share:
Weighted Average Number of Shares Outstanding, Basic	2,053	2,097
Weighted Average Number of Shares Outstanding, Diluted	2,053	2,097
Net income per share:
Earnings Per Share, Basic	$ 0.42	$ 0.18
Earnings Per Share, Diluted	$ 0.40	$ 0.18
Common Class B | Basic
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	$ 110	$ 113
Common Class B | Diluted
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	$ 110	$ 113