Marketable Securities (Details 2) $ in Thousands	Sep. 02, 2017 USD ($)
Amortized Cost
Due within one year	$ 463
Due after one year through five years	3,453
Due after five years through 10 years	5,129
Due after 10 years through 15 years	1,291
Due beyond 15 years	350
Total	10,686
Estimated Fair Value
Due within one year	464
Due after one year through five years	3,511
Due after five years through 10 years	5,253
Due after 10 years through 15 years	1,242
Due beyond 15 years	351
Total	$ 10,821