Annual report pursuant to Section 13 and 15(d)

Note 5 - Fair Value Measurement (Details Textual)

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Note 5 - Fair Value Measurement (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 11 Months Ended 12 Months Ended
Apr. 29, 2019
Apr. 26, 2019
Nov. 30, 2016
Oct. 31, 2019
Oct. 31, 2020
Dec. 06, 2018
Payment for Contingent Consideration Liability, Financing Activities       $ (0) $ 1,161  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)           1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)         $ 11.50 $ 11.50
Public Warrants [Member]            
Class of Warrant or Right, Outstanding (in shares)       13,017,777 13,017,777  
Numer of Warrants Tendered for Exchange (in shares)   9,982,123        
Number of Shares Issued in Exchange for Warrants (in shares) 2,101,213          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 11.50          
Class of Warrant or Right, Redemption Price (in dollars per share) 0.01          
Class of Warrant or Right, Redemption, Common Stock Price Trigger (in dollars per share) $ 18.00          
Class of Warrant or Right, Redemption, Trading Period (Day) 20 days          
Class of Warrant or Right, Redemption, Trading Period Maximum (Day) 30 days          
Private Warrants [Member]            
Class of Warrant or Right, Outstanding (in shares)       0 0  
Numer of Warrants Tendered for Exchange (in shares) 11,100,000 11,100,000        
Number of Shares Issued in Exchange for Warrants (in shares) 1,707,175          
Warrant To Purchase Class A Common Stock [Member]            
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 1          
Camfaud [Member]            
Payment for Contingent Consideration Liability, Financing Activities         $ 1,200  
Payment for Contingent Consideration Liability, Operating Activities         $ 500  
Camfaud [Member] | Earnout Payments [Member]            
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     $ 3,100      
Earnout Period (Year)     3 years      
Business Combination, Contingent Consideration, Liability, Total       $ 1,700