Schedule of Segment Reporting Information, by Segment [Table Text Block] |
| | | | | | | | | Three Months Ended April 30, 2020 | | | Three Months Ended April 30, 2019 | | | Six Months Ended April 30, 2020 | | | December 6, 2018 through April 30, 2019 | | | November 1, 2018 through December 5, 2018 | | | | | | | | | | | | | | | | | | | | | | | U.S. Concrete Pumping | | $ | 57,459 | | | $ | 42,548 | | | $ | 112,564 | | | $ | 66,615 | | | $ | 16,659 | | U.K. Operations | | | 8,401 | | | | 12,689 | | | | 19,086 | | | | 18,504 | | | | 5,143 | | U.S. Concrete Waste Management Services | | | 8,306 | | | | 6,751 | | | | 16,589 | | | | 10,839 | | | | 2,628 | | Corporate | | | 625 | | | | - | | | | 1,250 | | | | - | | | | 242 | | Intersegment | | | (750 | ) | | | - | | | | (1,509 | ) | | | - | | | | (276 | ) | | | $ | 74,041 | | | $ | 61,988 | | | $ | 147,980 | | | $ | 95,958 | | | $ | 24,396 | | | | | | | | | | | | | | | | | | | | | | | Income (loss) before income taxes | | | | | | | | | | | | | | | | | | | | | U.S. Concrete Pumping | | $ | (47,054 | ) | | $ | (9,472 | ) | | $ | (50,928 | ) | | $ | (13,896 | ) | | $ | (27,354 | ) | U.K. Operations | | | (15,446 | ) | | | 899 | | | | (16,454 | ) | | | (1,064 | ) | | | 207 | | U.S. Concrete Waste Management Services | | | 893 | | | | (123 | ) | | | 1,464 | | | | (414 | ) | | | 225 | | Corporate | | | 418 | | | | 623 | | | | 836 | | | | 906 | | | | 155 | | | | $ | (61,189 | ) | | $ | (8,073 | ) | | $ | (65,082 | ) | | $ | (14,468 | ) | | $ | (26,767 | ) |
| | | | | | | | | Three Months Ended April 30, 2020 | | | Three Months Ended April 30, 2019 | | | Six Months Ended April 30, 2020 | | | December 6, 2018 through April 30, 2019 | | | November 1, 2018 through December 5, 2018 | | | | | | | | | | | | | | | | | | | | | | | U.S. Concrete Pumping | | $ | (28,814 | ) | | $ | 5,812 | | | $ | (13,952 | ) | | $ | 11,348 | | | $ | (24,565 | ) | U.K. Operations | | | (12,712 | ) | | | 4,298 | | | | (10,753 | ) | | | 4,431 | | | | 1,587 | | U.S. Concrete Waste Management Services | | | 3,553 | | | | 2,580 | | | | 6,803 | | | | 4,161 | | | | 388 | | Corporate | | | 625 | | | | 687 | | | | 1,250 | | | | 1,008 | | | | 180 | | | | $ | (37,348 | ) | | $ | 13,377 | | | $ | (16,652 | ) | | $ | 20,948 | | | $ | (22,410 | ) | | | | | | | | | | | | | | | | | | | | | | Consolidated EBITDA reconciliation | | | | | | | | | | | | | | | | | | | | | Net loss | | $ | (58,968 | ) | | $ | (9,645 | ) | | $ | (61,714 | ) | | $ | (13,275 | ) | | $ | (22,575 | ) | Interest expense, net | | | 8,765 | | | | 9,318 | | | | 18,268 | | | | 14,910 | | | | 1,644 | | Income tax benefit | | | (2,221 | ) | | | 1,572 | | | | (3,368 | ) | | | (1,193 | ) | | | (4,192 | ) | Depreciation and amortization | | | 15,076 | | | | 12,132 | | | | 30,162 | | | | 20,506 | | | | 2,713 | | EBITDA | | $ | (37,348 | ) | | $ | 13,377 | | | $ | (16,652 | ) | | $ | 20,948 | | | $ | (22,410 | ) |
| | | | | | | | | Three Months Ended April 30, 2020 | | | Three Months Ended April 30, 2019 | | | Six Months Ended April 30, 2020 | | | December 6, 2018 through April 30, 2019 | | | November 1, 2018 through December 5, 2018 | | Depreciation and amortization | | | | | | | | | | | | | | | | | | | | | U.S. Concrete Pumping | | $ | 10,144 | | | $ | 6,706 | | | $ | 20,148 | | | $ | 11,532 | | | $ | 1,635 | | U.K. Operations | | | 2,065 | | | | 2,659 | | | | 4,261 | | | | 4,297 | | | | 890 | | U.S. Concrete Waste Management Services | | | 2,660 | | | | 2,703 | | | | 5,339 | | | | 4,575 | | | | 163 | | Corporate | | | 207 | | | | 64 | | | | 414 | | | | 102 | | | | 25 | | | | $ | 15,076 | | | $ | 12,132 | | | $ | 30,162 | | | $ | 20,506 | | | $ | 2,713 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | U.S. Concrete Pumping | | $ | (8,096 | ) | | $ | (8,578 | ) | | $ | (16,828 | ) | | $ | (13,712 | ) | | $ | (1,154 | ) | U.K. Operations | | | (669 | ) | | | (740 | ) | | | (1,440 | ) | | | (1,198 | ) | | | (490 | ) | U.S. Concrete Waste Management Services | | | - | | | | - | | | | - | | | | - | | | | - | | Corporate | | | - | | | | - | | | | - | | | | - | | | | - | | | | $ | (8,765 | ) | | $ | (9,318 | ) | | $ | (18,268 | ) | | $ | (14,910 | ) | | $ | (1,644 | ) | | | | | | | | | | | | | | | | | | | | | | Transaction costs including transaction-related debt extinguishment | | | | | | | | | | | | | | | | | | | | | Corporate | | $ | - | | | $ | 1,282 | | | $ | - | | | $ | 1,282 | | | $ | 30,562 | | | | $ | - | | | $ | 1,282 | | | $ | - | | | $ | 1,282 | | | $ | 30,562 | |
|
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
| | | | | | | | | Three Months Ended April 30, 2020 | | | Three Months Ended April 30, 2019 | | | Six Months Ended April 30, 2020 | | | December 6, 2018 through April 30, 2019 | | | November 1, 2018 through December 5, 2018 | | | | | | | | | | | | | | | | | | | | | | | U.S. | | $ | 65,640 | | | $ | 49,299 | | | $ | 128,894 | | | $ | 77,454 | | | $ | 19,253 | | U.K. | | | 8,401 | | | | 12,689 | | | | 19,086 | | | | 18,504 | | | | 5,143 | | | | $ | 74,041 | | | $ | 61,988 | | | $ | 147,980 | | | $ | 95,958 | | | $ | 24,396 | |
| | | | | | | | | | | | | | | | | | | | | | | U.S. | | $ | 265,430 | | | $ | 263,363 | | U.K. | | | 41,683 | | | | 44,052 | | | | $ | 307,113 | | | $ | 307,415 | |
|