Financial Instruments, Short-term Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Jun. 29, 2013
Available-for-sale Securities [Abstract]
Amortized Cost Basis	$ 49,853	$ 25,024
Gross Unrealized Gains	100	36
Gross Unrealized Loss	0	0
Estimated Fair Value	49,953	25,060
Government agency securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost Basis	0	25,024
Gross Unrealized Gains	0	36
Gross Unrealized Loss	0	0
Estimated Fair Value	0	25,060
US Treasury Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost Basis	49,853	0
Gross Unrealized Gains	100	0
Gross Unrealized Loss	0	0
Estimated Fair Value	$ 49,953	$ 0