Accrued Liabilities - Summary (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 26, 2020
Payables and Accruals [Abstract]
Compensation	$ 29,397	$ 20,817
Refund liabilities	9,351	8,581
Lease liabilities	3,975	3,273
Deferred revenue	3,923	3,931
Professional fees	2,525	2,449
Earn-out liability expected to be settled within twelve months	1,958	2,108
Deferred compensation	1,709	1,365
Environment reserve	531	1,450
Other	6,015	6,658
Accrued liabilities	$ 59,384	$ 50,632

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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