Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Jun. 28, 2020	53,704,477	33,822,823				23,243,551
Balance at Jun. 28, 2020	$ 537	$ 338	$ 358,031	$ 167,523	$ (243)	$ (126,412)	$ 399,774
Net loss	$ 0	$ 0	0	(9,762)	0	$ 0	(9,762)
Stock-based compensation (in shares)	88,666	0				0
Stock-based compensation	$ 1	$ 0	2,392	0	0	$ 0	2,393
Exercise of stock options (in shares)	76,378	0				0
Exercise of stock options	$ 1	$ 0	220	0	0	$ 0	221
Acquisition of Class A treasury stock (in shares)	0	0				36,355
Acquisition of Class A treasury stock	$ 0	$ 0	0	0	0	$ (1,088)	(1,088)
Conversion – Class B into Class A (in shares)	184,209
Conversion – Class B into Class A	$ 2
Conversion – Class B into Class A (in shares)		(184,209)
Conversion – Class B into Class A		$ (2)
Balance (in shares) at Sep. 27, 2020	54,053,730	33,638,614				23,279,906
Balance at Sep. 27, 2020	$ 541	$ 336	360,643	157,761	(243)	$ (127,500)	391,538
Balance (in shares) at Jun. 27, 2021	55,675,661	33,433,614				24,105,841
Balance at Jun. 27, 2021	$ 557	$ 334	371,103	286,175	(318)	$ (148,781)	509,070
Net loss	$ 0	$ 0	0	(13,199)	0	$ 0	(13,199)
Stock-based compensation (in shares)	172,500	0				0
Stock-based compensation	$ 2	$ 0	3,003	0	0	$ 0	$ 3,005
Exercise of stock options (in shares)	249,900	0				0	249,900
Exercise of stock options	$ 2	$ 0	561	0	0	$ 0	$ 563
Acquisition of Class A treasury stock (in shares)	0	0				288,026
Acquisition of Class A treasury stock	$ 0	$ 0	0	0	0	$ (9,065)	(9,065)
Balance (in shares) at Sep. 26, 2021	56,098,061	33,433,614				24,393,867
Balance at Sep. 26, 2021	$ 561	$ 334	$ 374,667	$ 272,976	$ (318)	$ (157,846)	$ 490,374