Consolidated Statements of Stockholders' Equity - 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 Jul. 01, 2018	52,071,293	33,822,823				21,258,790
Balance at Jul. 01, 2018	$ 520	$ 338	$ 341,783	$ 73,429	$ (200)	$ (100,966)	$ 314,904
Net income	0	0	0	34,766	0	0	34,766
Translation adjustment	$ 0	$ 0	0	0	(69)	$ 0	(69)
Stock-based compensation (in shares)	411,600	0				0
Stock-based compensation	$ 4	$ 0	6,306	0	0	$ 0	6,310
Exercise of stock options (in shares)	601,234	0				0
Exercise of stock options	$ 6	$ 0	1,230	0	0	$ 0	1,236
Other	$ 0	$ 0	0	330	0	$ 0	$ 330
Acquisition of Class A treasury stock (in shares)	0	0				1,230,303	1,230,303
Acquisition of Class A treasury stock	$ 0	$ 0	0	0	0	$ (14,766)	$ (14,766)
Balance (in shares) at Jun. 30, 2019	53,084,127	33,822,823				22,489,093
Balance at Jun. 30, 2019	$ 530	$ 338	349,319	108,525	(269)	$ (115,732)	342,711
Net income	0	0	0	58,998	0	0	58,998
Translation adjustment	$ 0	$ 0	0	0	26	$ 0	26
Stock-based compensation (in shares)	470,350	0				0
Stock-based compensation	$ 5	$ 0	8,429	0	0	$ 0	8,434
Exercise of stock options (in shares)	150,000	0				0
Exercise of stock options	$ 2	$ 0	283	0	0	$ 0	$ 285
Acquisition of Class A treasury stock (in shares)	0	0				754,458	754,458
Acquisition of Class A treasury stock	$ 0	$ 0	0	0	0	$ (10,680)	$ (10,680)
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 income	0	0	0	118,652	0	0	118,652
Translation adjustment	$ 0	$ 0	0	0	(75)	$ 0	(75)
Stock-based compensation (in shares)	688,675	0				0
Stock-based compensation	$ 7	$ 0	10,828	0	0	$ 0	$ 10,835
Exercise of stock options (in shares)	893,300	0				0	893,300
Exercise of stock options	$ 9	$ 0	2,244	0	0	$ 0	$ 2,253
Acquisition of Class A treasury stock (in shares)	0	0				862,290	862,290
Acquisition of Class A treasury stock	$ 0	$ 0	0	0	0	$ (22,369)	$ (22,369)
Conversion of Class B stock into Class A stock (in shares)	389,209
Conversion of Class B stock into Class A stock	$ 4
Conversion of Class B stock into Class A stock (in shares)		(389,209)
Conversion of Class B stock into Class A stock		$ (4)
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