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Marketable Securities - Available-for-sale by Maturity Date (Details)
$ in Thousands
Jul. 28, 2018
USD ($)
Schedule of Available-for-sale Securities  
Less than 12 months $ 14,730
Greater than 12 months 12,622
Total 27,352
Certificates of deposit  
Schedule of Available-for-sale Securities  
Less than 12 months 2,725
Greater than 12 months 3,464
Total 6,189
U.S. Government securities  
Schedule of Available-for-sale Securities  
Less than 12 months 995
Greater than 12 months 991
Total 1,986
U.S. Government sponsored entities  
Schedule of Available-for-sale Securities  
Less than 12 months 8,350
Greater than 12 months 6,621
Total 14,971
Municipal bonds  
Schedule of Available-for-sale Securities  
Less than 12 months 2,660
Greater than 12 months 1,546
Total $ 4,206