Investments in Marketable Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Jun. 30, 2012
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 Months, Fair Value	$ 15,877	$ 19,354
Less Than 12 Months, Unrealized Losses	37	106
12 Months or Longer, Fair Value	3,296	5,780
12 Months or Longer, Unrealized Losses	91	260
Total, Fair Value	19,173	25,134
Total, Unrealized Losses	128	366
US Treasury Securities [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 Months, Fair Value		3,434
Less Than 12 Months, Unrealized Losses		5
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total, Fair Value		3,434
Total, Unrealized Losses		5
National government and agency securities [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 Months, Fair Value	141	327
Less Than 12 Months, Unrealized Losses
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total, Fair Value	141	327
Total, Unrealized Losses
State and municipal bond obligations [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 Months, Fair Value	1,186	1,033
Less Than 12 Months, Unrealized Losses	1	1
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total, Fair Value	1,186	1,033
Total, Unrealized Losses	1	1
Corporate bonds and notes [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 Months, Fair Value	7,782	12,117
Less Than 12 Months, Unrealized Losses	22	85
12 Months or Longer, Fair Value	2,338	3,782
12 Months or Longer, Unrealized Losses	47	112
Total, Fair Value	10,120	15,899
Total, Unrealized Losses	69	197
Asset backed Securities [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 Months, Fair Value	4,578	1,784
Less Than 12 Months, Unrealized Losses	8	15
12 Months or Longer, Fair Value	730	1,595
12 Months or Longer, Unrealized Losses	7	71
Total, Fair Value	5,308	3,379
Total, Unrealized Losses	15	86
Mortgage backed securities [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 Months, Fair Value	2,190	659
Less Than 12 Months, Unrealized Losses	6
12 Months or Longer, Fair Value	228	403
12 Months or Longer, Unrealized Losses	37	77
Total, Fair Value	2,418	1,062
Total, Unrealized Losses	$ 43	$ 77