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]	Parent [Member]	Noncontrolling Interest [Member]	Common Class A [Member]	Total
Balance (in shares) at Jun. 28, 2015	42,875,291	39,310,044				17,154,475
Balance at Jun. 28, 2015	$ 429	$ 393	$ 319,108	$ (48,278)	$ (371)	$ (62,832)	$ 208,449	$ 1,807		$ 210,256
Net income				36,875			36,875	(1,007)		35,868
Translation adjustment					165		165	87		252
Noncontrolling interest write-off					60		60	(887)		(827)
Conversion of Class B stock into Class A stock (in shares)	4,047,040	(4,047,040)
Conversion of Class B stock into Class A stock	$ 40	$ (40)
Stock-based compensation (in shares)	879,863
Stock-based compensation	$ 9		6,334				6,343			6,343
Exercise of stock options (in shares)	1,044,255
Exercise of stock options	$ 10		3,507				3,517			3,517
Excess tax benefit from stock-based compensation			2,400				2,400			$ 2,400
Acquisition of Class A treasury stock (in shares)						1,714,550				1,714,550
Acquisition of Class A treasury stock						$ (15,223)	(15,223)			$ (15,223)
Balance (in shares) at Jul. 03, 2016	48,846,449	35,263,004				18,869,025
Balance at Jul. 03, 2016	$ 488	$ 353	331,349	(11,403)	(146)	$ (78,055)	242,586			242,586
Net income				44,041			44,041			44,041
Translation adjustment					(41)		(41)			(41)
Conversion of Class B stock into Class A stock (in shares)	1,361,401	(1,361,401)							1,361,401
Conversion of Class B stock into Class A stock	$ 14	$ (14)
Stock-based compensation (in shares)	965,429
Stock-based compensation	$ 10		6,092				6,102			6,102
Exercise of stock options (in shares)	54,500
Exercise of stock options	$ 1		285				286			$ 286
Acquisition of Class A treasury stock (in shares)						1,120,706				1,120,706
Acquisition of Class A treasury stock						$ (10,735)	(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			282,239
Net income				40,791			40,791			40,791
Translation adjustment					(13)		(13)			(13)
Conversion of Class B stock into Class A stock (in shares)	78,780	(78,780)							78,780
Conversion of Class B stock into Class A stock	$ 1	$ (1)
Stock-based compensation (in shares)	622,734
Stock-based compensation	$ 5		3,721				3,726			$ 3,726
Exercise of stock options (in shares)	142,000									142,000
Exercise of stock options	$ 1		336				337			$ 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)			$ (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			$ 314,904