Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Nov. 02, 2019	Jul. 31, 2019
Recent Accounting Pronouncements [Abstract]
Right-of-use assets	$ 5,771	$ 0
Lease liabilities	$ 5,795
ASU 2016-02 [Member]
Recent Accounting Pronouncements [Abstract]
Right-of-use assets		6,200
Lease liabilities		$ 6,200