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. 02, 2016	48,846,449	35,263,004				18,869,025
Balance at Jul. 02, 2016	$ 488	$ 353	$ 331,349	$ (11,403)	$ (146)	$ (78,055)	$ 242,586
Net income				44,041			44,041
Translation adjustment					(41)		(41)
Conversion of Class B stock into Class A stock (in shares)	1,361,401,000
Conversion of Class B stock into Class A stock	$ 14
Conversion of Class B stock into Class A stock (in shares)		(1,361,401,000)
Conversion of Class B stock into Class A stock		$ (14)
Stock-based compensation (in shares)	965,429
Stock-based compensation	$ 10		6,092				6,102
Exercise of stock options (in shares)	54,500
Exercise of stock options	$ 1		285				286
Acquisition of Class A treasury stock (in shares)						1,120,706
Acquisition of Class A treasury stock						$ (10,735)	(10,735)
Balance (in shares) at Jul. 02, 2017	51,227,779	33,901,603				19,989,731
Balance at Jul. 02, 2017	$ 513	$ 339	337,726	32,638	(187)	$ (88,790)	282,239
Net income				40,791			40,791
Translation adjustment					(13)		(13)
Conversion of Class B stock into Class A stock (in shares)	78,780,000
Conversion of Class B stock into Class A stock	$ 1
Conversion of Class B stock into Class A stock (in shares)		(78,780,000)
Conversion of Class B stock into Class A stock		$ (1)
Stock-based compensation (in shares)	622,734
Stock-based compensation	$ 5		3,721				3,726
Exercise of stock options (in shares)	142,000
Exercise of stock options	$ 1		336				$ 337
Acquisition of Class A treasury stock (in shares)						1,269,059	1,269,059
Acquisition of Class A treasury stock						$ (12,176)	$ (12,176)
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				34,766			34,766
Translation adjustment					(69)		(69)
Stock-based compensation (in shares)	411,600
Stock-based compensation	$ 4		6,306				$ 6,310
Exercise of stock options (in shares)	601,234						601,234
Exercise of stock options	$ 6		1,230				$ 1,236
Acquisition of Class A treasury stock (in shares)						1,230,303	1,230,303
Acquisition of Class A treasury stock						$ (14,766)	$ (14,766)
Other			330				330
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