Investment in Joint Ventures and Majority Owned Subsidiaries (Details Textual) - USD ($)	12 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Schedule Of Equity Method Investments [Line Items]
Equity (loss) earnings of joint ventures	$ (209,000)	$ 2,783,000
Payments to acquire interest in joint venture		$ 200,000
ADAC-STRATTEC LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in less than wholly owned consolidated subsidiary	51.00%	51.00%
Income (loss) from majority owned subsidiaries, impact on net income	$ 1,500,000	$ 2,700,000
STRATTEC POWER ACCESS LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in less than wholly owned consolidated subsidiary	80.00%	80.00%
Income (loss) from majority owned subsidiaries, impact on net income	$ (1,300,000)	$ 2,500,000
VAST LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in equity method investment	33.33%
Equity (loss) earnings of joint ventures	$ (565,000)	2,655,000
Impairment change of equity method investment	2,000,000
Payments to acquire interest in joint venture	$ 0	600,000
VAST LLC | MINDA-VAST ACCESS SYSTEMS
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in equity method investment	50.00%
VAST LLC | STRATTEC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in equity method investment	33.30%
Equity (loss) earnings of joint ventures	$ (565,000)
Impairment change of equity method investment	$ 667,000
Payments to acquire interest in joint venture		200,000
SAL LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in equity method investment	51.00%
Equity (loss) earnings of joint ventures	$ 356,000	$ 128,000
Gain (loss) on dissolution	$ 342,000
ADAC | ADAC-STRATTEC LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in less than wholly owned consolidated subsidiary	49.00%	49.00%
Engineering, research, design and sales fee	$ 6,900,000	$ 8,200,000
Outstanding payable balance	658,000	1,500,000
Sales	10,200,000	15,300,000
Outstanding receivable balance	$ 1,000,000.0	$ 2,100,000
ADAC | VAST LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in equity method investment	33.30%
WITTE | STRATTEC POWER ACCESS LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in less than wholly owned consolidated subsidiary	20.00%	20.00%
Outstanding payable balance	$ 21,000	$ 153,000
Purchases	$ 1,000,000.0	$ 1,300,000
WITTE | VAST LLC
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest in equity method investment	33.30%