Annual report pursuant to Section 13 and 15(d)

Note 8 - Goodwill and Intangible Assets (Details Textual)

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Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 11 Months Ended 12 Months Ended
Dec. 05, 2018
Oct. 31, 2019
Oct. 31, 2018
Jul. 31, 2019
Amortization of Intangible Assets, Total $ 653 $ 32,366 $ 7,904  
US Concrete Pumping [Member]        
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount       4.00%
UK Concrete Pumping [Member]        
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount       3.00%
US Concrete Waste Management Services [Member]        
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount       4.00%
CPH Acquisition [Member]        
Goodwill, Out of Period Adjustment   (3,400)    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities   $ (3,400)