Impairment and other lease charges (Details) - USD ($)	9 Months Ended
	Mar. 26, 2017	Mar. 27, 2016
Impairment and other lease charges Details
Recoveries to prior lease termination charges	$ 100,000	$ 200,000
Recognized impairment charges	4,700,000
Recognized lease termination expenses	$ 500,000
Recognized impairment and lease termination charges		$ 800,000