Leases - Supplemental Cash Flow Information (Details) $ in Thousands	12 Months Ended
	Jan. 26, 2020 USD ($)
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 5,189
Right-of-use assets obtained in exchange for new operating lease liabilities	3,366
Write-down of right-of-use assets	$ 1,363