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Business Acquisitions - Telerob (Details)
€ in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
May 03, 2021
USD ($)
May 03, 2021
EUR (€)
Oct. 30, 2021
USD ($)
Oct. 31, 2020
USD ($)
Oct. 30, 2021
USD ($)
Oct. 31, 2020
USD ($)
May 03, 2021
EUR (€)
Apr. 30, 2021
USD ($)
Business Acquisitions                
Number of months until escrow will be release 30 months 30 months            
Fair value of assets acquired:                
Goodwill     $ 335,888   $ 335,888     $ 314,205
Supplemental Pro Forma Information (unaudited)                
Revenue       $ 116,123        
Net income (loss)       4,151        
Telerob [Member]                
Business Acquisitions                
Total paid $ 45,400 € 37,455            
Amount held in escrow 3,636           € 3,000  
Amount of indebtedness paid 9,468 7,811            
Period to obtain target         36 months      
Fair value of assets acquired:                
Accounts receivable 1,045              
Unbilled receivable 829              
Prepaid and other current assets 314              
Operating lease assets (1,508)              
Other assets 154              
Other intangible asset 102              
Goodwill 21,140              
Total assets acquired 60,637              
Fair value of liabilities assumed:                
Accounts payable 1,136              
Wages and related accruals 560              
Current operating lease liabilities 361              
Customer advances 1,243              
Other current liabilities 3,310              
Non-current operating lease liabilities 1,147              
Other non-current liabilities 224              
Deferred income taxes, net 5,617              
Total liabilities assumed 13,598              
Total identifiable net assets 47,039              
Fair value of consideration transferred:                
Cash consideration, net of cash acquired 46,150              
Equity consideration 889              
Total 47,039              
Supplemental Pro Forma Information (unaudited)                
Revenue     122,008 101,081 $ 223,017 $ 196,224    
Net income (loss)     4,454 $ 277 (7,844) $ 9,133    
SG&A | Telerob [Member]                
Business Acquisitions                
Acquisition-related costs     $ 137   $ 548      
Technology | Telerob [Member]                
Fair value of assets acquired:                
Intangible assets 11,500              
Backlog | Telerob [Member]                
Fair value of assets acquired:                
Intangible assets 2,400              
Customer relationships | Telerob [Member]                
Fair value of assets acquired:                
Intangible assets 5,000              
In-process research and development | Telerob [Member]                
Fair value of assets acquired:                
Inventories, net 15,074              
Non-compete agreements | Telerob [Member]                
Fair value of assets acquired:                
Property and equipment, net 1,571              
Business Combination, Specific Revenue Targets Achieved In First Earnout Year [Member] | Telerob [Member]                
Business Acquisitions                
Contingent consideration paid $ 2,424 € 2,000            
Period to obtain target 12 months 12 months            
Business Combination, Specific Revenue Targets Achieved Following The First Earnout Year [Member] | Telerob [Member]                
Business Acquisitions                
Contingent consideration paid $ 2,424 € 2,000            
Period to obtain target 12 months 12 months            
Business Combination, Specific Awards Or Orders From US Military Are Achieved Prior To 36 Month Post Closing Period [Member] | Telerob [Member]                
Business Acquisitions                
Contingent consideration paid $ 2,424 € 2,000            
Period to obtain target 36 months 36 months