Significant Accounting Policies (Revenue, Initial Application Period Cumulative Effect Transition) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jun. 29, 2019	Jun. 30, 2018	Jul. 01, 2017	Jul. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net, Current	$ 22,161				$ 0				$ 22,161	$ 0		$ 11,906
Inventories, net	100,431				110,315				100,431	110,315		99,105
Deferred income tax asset	7,840				7,882				7,840	7,882		7,715
Retained earnings	65,353				72,806				65,353	72,806		73,335
Net sales	105,581	$ 107,954	$ 123,037	$ 127,472	117,028	$ 108,352	$ 111,725	$ 109,217	464,044	446,322	$ 467,797
Cost of sales									429,443	412,153	429,497
Gross profit	8,381	6,807	9,880	9,533	9,369	8,155	8,800	7,845	34,601	34,169	38,300
Net income (loss)	817	$ (11,981)	$ 1,589	$ 1,593	$ (2,177)	$ 644	$ (224)	$ 432	(7,982)	$ (1,325)	$ 5,617
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net, Current	(22,161)								(22,161)			11,906
Inventories, net	19,563								19,563			(11,210)
Deferred income tax asset	167								167			(167)
Retained earnings	2,431								2,431			$ 529
Net sales									10,254
Cost of sales									8,353
Gross profit									1,901
Net income (loss)									1,901
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net, Current	0								0
Inventories, net	119,994								119,994
Deferred income tax asset	8,007								8,007
Retained earnings	$ 62,922								62,922
Net sales									453,790
Cost of sales									421,090
Gross profit									32,700
Net income (loss)									$ (9,883)