Calculation of Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 01, 2018	Dec. 02, 2017	Dec. 01, 2018	Dec. 02, 2017
Numerator for Basic and Diluted Earnings Per Share:
Net (loss) income from continuing operations	$ (304)	$ 172	$ 127	$ 60
Undistributed losses - continuing operations, Basic	(1,074)	(591)	(1,407)	(1,461)
Income from discontinued operations		1,496		1,496
Undistributed earnings (losses) - discontinued operations, Basic		733		(25)
Net (loss) income	(304)	1,668	127	1,556
Undistributed (losses) earnings, Basic	(1,074)	905	(1,407)	35
Undistributed losses - continuing operations, Diluted	(1,074)	(591)	(1,407)	(1,461)
Undistributed earnings (losses) - discontinued operations, Diluted		733		(25)
Undistributed (losses) earnings, Diluted	(1,074)	905	(1,407)	35
Basic
Numerator for Basic and Diluted Earnings Per Share:
Net (loss) income from continuing operations	(304)	172	127	60
Income from discontinued operations		1,496		1,496
Net (loss) income	(304)	1,668	127	1,556
Diluted
Numerator for Basic and Diluted Earnings Per Share:
Net (loss) income from continuing operations	(304)	172	127	60
Income from discontinued operations		1,496		1,496
Net (loss) income	$ (304)	$ 1,668	$ 127	$ 1,556
Denominator for basic and diluted Earnings Per Share:
Effect of dilutive securities dilutive stock options		34	163	30
Weighted Average Number of Shares Outstanding, Diluted	13,049	12,926	13,167	12,901
Common Class B
Numerator for Basic and Diluted Earnings Per Share:
Undistributed losses - continuing operations, Basic	$ (158)	$ (90)	$ (209)	$ (222)
Undistributed earnings (losses) - discontinued operations, Basic		111		(4)
Undistributed (losses) earnings, Basic	(158)	137	(209)	5
Undistributed losses - continuing operations, Diluted	(158)	(90)	(207)	(222)
Undistributed earnings (losses) - discontinued operations, Diluted		111		(4)
Undistributed (losses) earnings, Diluted	$ (158)	$ 137	$ (207)	$ 5
Denominator for basic and diluted Earnings Per Share:
Weighted Average Number of Shares Outstanding, Basic	2,097	2,137	2,114	2,137
Weighted Average Number of Shares Outstanding, Diluted	2,097	2,137	2,114	2,137
Net (loss) income from continuing operations per share:
(Loss) income from continuing operations, Basic	$ (0.02)	$ 0.01	$ 0.01
(Loss) income from continuing operations, Diluted	(0.02)	0.01	0.01
Income from discontinued operations per share:
Income from discontinued operations, Basic		0.11		$ 0.11
Income from discontinued operations, Diluted		0.11		0.11
Net (loss) income per share:
Earnings Per Share, Basic	(0.02)	0.12	0.01	0.11
Earnings Per Share, Diluted	$ (0.02)	$ 0.12	$ 0.01	$ 0.11
Common Class B | Basic
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	$ 112	$ 116	$ 228	$ 231
Common Class B | Basic | Continuing Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	112	116	228	231
Common Class B | Basic | Discontinued Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends		116		231
Common Class B | Diluted
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	112	116	228	231
Common Class B | Diluted | Continuing Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	112	116	228	231
Common Class B | Diluted | Discontinued Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends		116		231
Common Stock
Numerator for Basic and Diluted Earnings Per Share:
Undistributed losses - continuing operations, Basic	(916)	(501)	(1,198)	(1,239)
Undistributed earnings (losses) - discontinued operations, Basic		622		(21)
Undistributed (losses) earnings, Basic	(916)	768	(1,198)	30
Undistributed losses - continuing operations, Diluted	(916)	(501)	(1,200)	(1,239)
Undistributed earnings (losses) - discontinued operations, Diluted		622		(21)
Undistributed (losses) earnings, Diluted	$ (916)	$ 768	$ (1,200)	$ 30
Denominator for basic and diluted Earnings Per Share:
Weighted Average Number of Shares Outstanding, Basic	10,952	10,755	10,890	10,734
Weighted Average Number of Shares Outstanding, Diluted	10,952	10,755	10,890	10,734
Net (loss) income from continuing operations per share:
(Loss) income from continuing operations, Basic	$ (0.02)	$ 0.01	$ 0.01
(Loss) income from continuing operations, Diluted	(0.02)	0.01	0.01
Income from discontinued operations per share:
Income from discontinued operations, Basic		0.12		$ 0.12
Income from discontinued operations, Diluted		0.12		0.12
Net (loss) income per share:
Earnings Per Share, Basic	(0.02)	0.13	0.01	0.12
Earnings Per Share, Diluted	$ (0.02)	$ 0.13	$ 0.01	$ 0.12
Common Stock | Basic
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	$ 658	$ 647	$ 1,306	$ 1,290
Common Stock | Basic | Continuing Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	658	647	1,306	1,290
Common Stock | Basic | Discontinued Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends		647		1,290
Common Stock | Diluted
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	658	647	1,306	1,290
Common Stock | Diluted | Continuing Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends	$ 658	647	$ 1,306	1,290
Common Stock | Diluted | Discontinued Operations
Numerator for Basic and Diluted Earnings Per Share:
Less dividends		$ 647		$ 1,290