Equity (Loss) Earnings of Joint Ventures - Summarized Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Summarized statements of operations
Net sales	$ 121,644	$ 116,938	$ 375,238	$ 343,183
Cost of goods sold	102,990	99,928	311,832	299,954
Gross profit	18,654	17,010	63,406	43,229
Engineering, selling and administrative expenses	11,927	10,727	33,543	35,775
Income from operations	6,727	6,283	29,863	7,454
Other income (expense), net	455	1,049	(1,171)	975
Income before provision for income taxes and non-controlling interest	7,063	6,207	30,277	7,692
Provision (Benefit) for Income Taxes	1,153	1,294	4,721	1,194
Net income	5,910	4,913	25,556	6,498
STRATTEC’s Equity (Loss) Earnings of VAST LLC	(56)	(921)	1,844	55
VAST LLC | Equity Method Investment Summarized Financial Information
Summarized statements of operations
Net sales	51,748	30,490	160,511	117,537
Cost of goods sold	44,155	25,679	131,345	96,131
Gross profit	7,593	4,811	29,166	21,406
Engineering, selling and administrative expenses	7,684	7,524	22,936	21,528
Income from operations	(91)	(2,713)	6,230	(122)
Other income (expense), net	327	(424)	1,363	1,079
Income before provision for income taxes and non-controlling interest	236	(3,137)	7,593	957
Provision (Benefit) for Income Taxes	348	(294)	2,011	851
Net income	(112)	(2,843)	5,582	106
STRATTEC's Share of VAST LLC Net (Loss) Income	(37)	(947)	1,861	36
Intercompany Profit Elimination	(19)		(17)
STRATTEC’s Equity (Loss) Earnings of VAST LLC	$ (56)	$ (947)	$ 1,844	$ 36