Annual report pursuant to Section 13 and 15(d)

Note 14 - Stockholders' Equity (Details Textual)

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Note 14 - Stockholders' Equity (Details Textual)
 3 Months Ended 11 Months Ended
Jun. 06, 2019
$ / shares
shares
May 14, 2019
USD ($)
$ / shares
shares
Apr. 29, 2019
shares
Apr. 26, 2019
shares
Apr. 01, 2019
Dec. 06, 2018
USD ($)
$ / shares
shares
Apr. 30, 2019
USD ($)
shares
Oct. 31, 2019
USD ($)
$ / shares
shares
Oct. 31, 2018
USD ($)
$ / shares
shares
Stock Redeemed or Called During Period, Value | $               $ 16,010,000  
Common Stock, Shares Authorized           500,000,000   500,000,000 15,000,000
Common Stock, Par or Stated Value Per Share | $ / shares           $ 0.0001   $ 0.0001 $ 0.001
Preferred Stock, Shares Authorized           10,000,000     2,423,711
Preferred Stock, Par or Stated Value Per Share | $ / shares           $ 0.0001     $ 0.001
Common Stock, Shares, Issued, Total           28,847,707   58,253,220 7,576,289
Common Stock, Shares, Outstanding, Ending Balance           28,847,707   58,253,220 7,576,289
Class of Warrant or Right, Number of Securities Called by Warrants or Rights           34,100,000      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right           1      
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares           $ 11.50      
Preferred Stock, Shares Outstanding, Ending Balance           2,450,980     2,342,264
Convertible Preferred Stock, Shares Issued upon Conversion 1                
Convertible Preferred Stock, Additional Cumulative Amount, Accrue Annual Rate 7.00%                
Convertible Preferred Stock, Convertible, Stock Price Trigger | $ / shares $ 13                
Adjustment to Equity Related to Issuance of Shares in Exchange for Warrants | $                
Par Value of Warrant in APIC | $             $ 21,100,000    
Stock Issued During Period, Value, Issued in Exchange for Warrant | $             26,300,000    
Preferred Stock, Shares Issued, Total                 2,342,264
Preferred Stock, Liquidation Preference, Value | $                 $ 11,200,000
Additional Paid-in Capital [Member]                  
Stock Redeemed or Called During Period, Value | $               12,433,000  
Adjustment to Equity Related to Issuance of Shares in Exchange for Warrants | $             5,200,000 5,158,000  
Retained Earnings [Member]                  
Stock Redeemed or Called During Period, Value | $               3,577,000  
Adjustment to Equity Related to Issuance of Shares in Exchange for Warrants | $             $ (5,200,000) $ (5,158,000)  
Public Warrants [Member]                  
Number of Shares Issued in Exchange for Warrants     2,101,213            
Class of Warrant or Right, Outstanding             13,017,777 13,017,777  
Warrant Exchange for Common Stock, Exchange Ratio         0.2105        
Numer of Warrants Tendered for Exchange       9,982,123          
Private Warrants [Member]                  
Number of Shares Issued in Exchange for Warrants     1,707,175            
Class of Warrant or Right, Outstanding               0  
Warrant Exchange for Common Stock, Exchange Ratio         0.1538        
Numer of Warrants Tendered for Exchange       11,100,000          
Public Offering [Member]                  
Stock Issued During Period, Shares, New Issues   18,098,166              
Shares Issued, Price Per Share | $ / shares   $ 4.50              
Proceeds from Issuance of Common Stock | $   $ 77,400,000              
Public Offering [Member] | Directors, Officers, Stockholders [Member]                  
Stock Issued During Period, Shares, New Issues   3,980,166              
Shares Issued, Price Per Share | $ / shares   $ 4.50              
Percentage of Shares Issued   25.00%              
Common Class A [Member]                  
Stock Redeemed or Called During Period, Shares           22,337,322      
Stock Redeemed or Called During Period, Value | $           $ 231,400,000      
Series A Preferred Stock [Member]                  
Preferred Stock, Dividend Rate, Percentage           0.00%