Fair Value Measurements - Financial Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 26, 2020
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	$ 11,989	$ 10,700
Recurring
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Total financial assets	11,989	10,700
Total financial liabilities	1,949	2,108
Recurring | Interest Rate Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	1,782	0
Recurring | Total Return Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	167	0
Recurring | Level 1
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Total financial assets	0	0
Total financial liabilities	0	0
Recurring | Level 1 | Interest Rate Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	0	0
Recurring | Level 1 | Total Return Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	0	0
Recurring | Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Total financial assets	0	0
Total financial liabilities	1,949	0
Recurring | Level 2 | Interest Rate Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	1,782	0
Recurring | Level 2 | Total Return Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	167	0
Recurring | Level 3
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Total financial assets	11,989	10,700
Total financial liabilities	0	2,108
Recurring | Level 3 | Interest Rate Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	0	0
Recurring | Level 3 | Total Return Swap
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Derivative Liability	0	0
Recurring | Convertible debt
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	11,989	10,700
Recurring | Convertible debt | Level 1
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Convertible debt | Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Convertible debt | Level 3
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	11,989	10,700
Cycleo Earn-out | Recurring
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Earn-out liability	0	2,108
Cycleo Earn-out | Recurring | Level 1
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Earn-out liability	0	0
Cycleo Earn-out | Recurring | Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Earn-out liability	0	0
Cycleo Earn-out | Recurring | Level 3
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Earn-out liability	$ 0	$ 2,108