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Fair Value Measurements - (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 23, 2021
Apr. 30, 2021
Jan. 29, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available for sale securities   $ 36,959 $ 3,969
Intelligent Systems Group      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingently returnable consideration   479  
Contingent consideration   (5,521)  
Contingent consideration paid $ 6,000 6,000  
Fair value of contingent consideration   5,521  
Released from escrow     2,000
Recurring basis      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available for sale securities   36,959 3,969
Contingently returnable consideration   479 216
Total   37,438 4,185
Contingent consideration     (889)
Total     889
Fair value of contingent consideration     889
Recurring basis | Significant other observable inputs (Level 2)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available for sale securities   36,959 3,969
Total   36,959 3,969
Recurring basis | Significant unobservable inputs (Level 3)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingently returnable consideration   479 216
Total   $ 479 216
Contingent consideration     (889)
Total     889
Fair value of contingent consideration     $ 889