2. Revenue: Schedule of changes in the contract assets and the contract liabilities (Details) $ in Thousands	3 Months Ended
	Sep. 27, 2019 USD ($)
Contract revenue recognized
Increase (Decrease) in Contract with Customer, Liability	$ (4,286)
Increase (Decrease) in Contract with Customer, Asset	(2,679)
Contract receivables recorded
Increase (Decrease) in Contract with Customer, Asset	2,758
Contract amount billed
Increase (Decrease) in Contract with Customer, Liability	$ 2,525