| Segment Reporting [Table Text Block] |
| | | Three Months Ended April 30, 2026 | |
| (in thousands) | | US Concrete Pumping | | | US Concrete Waste Management Services | | | UK Operations | | | Other / Eliminations | | | Total | |
| Segment Revenue: (1) | | $ | 71,530 | | | $ | 20,344 | | | $ | 14,922 | | | | | | | $ | 106,796 | |
| | | | | | | | | | | | | | | | | | | | | |
| Segment expenses: | | | | | | | | | | | | | | | | | | | | |
| Segment employee cost of operation expenses (2)(3) | | | 23,433 | | | | 3,558 | | | | 5,221 | | | | | | | | 32,212 | |
| Repairs & maintenance (2) | | | 6,211 | | | | 1,027 | | | | 1,000 | | | | | | | | 8,238 | |
| Fuel (2) | | | 4,422 | | | | 990 | | | | 1,502 | | | | | | | | 6,914 | |
| Segment employee G&A expenses (2)(4) | | | 8,012 | | | | 2,637 | | | | 1,416 | | | | | | | | 12,065 | |
| Other segment items (5) | | | 8,463 | | | | 2,317 | | | | 1,951 | | | | | | | | 12,731 | |
| Total segment adjusted EBITDA | | $ | 20,989 | | | $ | 9,815 | | | $ | 3,832 | | | | | | | $ | 34,636 | |
| | | | | | | | | | | | | | | | | | | | | |
| Reconciliation of segment adjusted EBITDA to income before taxes: | | | | | | | | | | | | | | | | | | | | |
| Depreciation and amortization (6) | | | | | | | | | | | | | | | | | | $ | 12,880 | |
| Interest expense and amortization of deferred financing costs, net of interest income | | | | | | | | | | | | | | | | | | | 8,209 | |
| Unallocated corporate expenses | | | | | | | | | | | | | | | | | | | 8,233 | |
| Stock-based compensation | | | | | | | | | | | | | | | | | | | 1,022 | |
| Other income, net | | | | | | | | | | | | | | | | | | | (36 | ) |
| Other adjustments | | | | | | | | | | | | | | | | | | | 443 | |
| Income before taxes | | | | | | | | | | | | | | | | | | $ | 3,885 | |
| | | | | | | | | | | | | | | | | | | | | |
| Other segment disclosures: | | | | | | | | | | | | | | | | | | | | |
| Capital expenditures | | $ | 4,162 | | | $ | 3,448 | | | $ | 13,633 | | | $ | - | | | $ | 21,243 | |
| | | Three Months Ended April 30, 2025 | |
| (in thousands) | | US Concrete Pumping | | | US Concrete Waste Management Services | | | UK Operations | | | Other / Eliminations | | | Total | |
| Segment Revenue: (1) | | $ | 62,109 | | | $ | 18,057 | | | $ | 13,792 | | | | | | | $ | 93,958 | |
| | | | | | | | | | | | | | | | | | | | | |
| Segment expenses: | | | | | | | | | | | | | | | | | | | | |
| Segment employee cost of operation expenses (2)(3) | | | 20,901 | | | | 3,243 | | | | 4,408 | | | | | | | | 28,552 | |
| Repairs & maintenance (2) | | | 4,174 | | | | 1,126 | | | | 717 | | | | | | | | 6,017 | |
| Fuel (2) | | | 3,385 | | | | 741 | | | | 1,251 | | | | | | | | 5,377 | |
| Segment employee G&A expenses (2)(4) | | | 7,637 | | | | 2,359 | | | | 1,492 | | | | | | | | 11,488 | |
| Other segment items (5) | | | 7,557 | | | | 2,087 | | | | 1,875 | | | | | | | | 11,519 | |
| Total segment adjusted EBITDA | | $ | 18,455 | | | $ | 8,501 | | | $ | 4,049 | | | | | | | $ | 31,005 | |
| | | | | | | | | | | | | | | | | | | | | |
| Reconciliation of segment adjusted EBITDA to income before taxes: | | | | | | | | | | | | | | | | | | | | |
| Depreciation and amortization (6) | | | | | | | | | | | | | | | | | | $ | 13,584 | |
| Interest expense and amortization of deferred financing costs, net of interest income | | | | | | | | | | | | | | | | | | | 8,294 | |
| Unallocated corporate expenses | | | | | | | | | | | | | | | | | | | 8,508 | |
| Stock-based compensation | | | | | | | | | | | | | | | | | | | 538 | |
| Other income, net | | | | | | | | | | | | | | | | | | | (28 | ) |
| Other adjustments | | | | | | | | | | | | | | | | | | | 115 | |
| Loss before taxes | | | | | | | | | | | | | | | | | | $ | (6 | ) |
| | | | | | | | | | | | | | | | | | | | | |
| Other segment disclosures: | | | | | | | | | | | | | | | | | | | | |
| Capital expenditures | | $ | 4,527 | | | $ | 4,262 | | | $ | 4,827 | | | $ | 34 | | | $ | 13,650 | |
| | | Six Months Ended April 30, 2026 | |
| (in thousands) | | US Concrete Pumping | | | US Concrete Waste Management Services | | | UK Operations | | | Other / Eliminations | | | Total | |
| Segment Revenue: (1) | | $ | 131,471 | | | $ | 38,416 | | | $ | 27,470 | | | | | | | $ | 197,357 | |
| | | | | | | | | | | | | | | | | | | | | |
| Segment expenses: | | | | | | | | | | | | | | | | | | | | |
| Segment employee cost of operation expenses (2)(3) | | | 44,441 | | | | 6,836 | | | | 9,361 | | | | | | | | 60,638 | |
| Repairs & maintenance (2) | | | 11,485 | | | | 1,913 | | | | 1,885 | | | | | | | | 15,283 | |
| Fuel (2) | | | 7,513 | | | | 1,700 | | | | 2,566 | | | | | | | | 11,779 | |
| Segment employee G&A expenses (2)(4) | | | 15,068 | | | | 5,050 | | | | 2,906 | | | | | | | | 23,024 | |
| Other segment items (5) | | | 17,111 | | | | 4,727 | | | | 3,845 | | | | | | | | 25,683 | |
| Total segment adjusted EBITDA | | $ | 35,853 | | | $ | 18,190 | | | $ | 6,907 | | | | | | | $ | 60,950 | |
| | | | | | | | | | | | | | | | | | | | | |
| Reconciliation of segment adjusted EBITDA to income before taxes: | | | | | | | | | | | | | | | | | | | | |
| Depreciation and amortization (6) | | | | | | | | | | | | | | | | | | $ | 25,808 | |
| Interest expense and amortization of deferred financing costs, net of interest income | | | | | | | | | | | | | | | | | | | 16,291 | |
| Unallocated corporate expenses | | | | | | | | | | | | | | | | | | | 16,520 | |
| Stock-based compensation | | | | | | | | | | | | | | | | | | | 1,640 | |
| Other income, net | | | | | | | | | | | | | | | | | | | (69 | ) |
| Other adjustments | | | | | | | | | | | | | | | | | | | 419 | |
| Income before taxes | | | | | | | | | | | | | | | | | | $ | 341 | |
| | | | | | | | | | | | | | | | | | | | | |
| Other segment disclosures: | | | | | | | | | | | | | | | | | | | | |
| Total assets (at period end) | | $ | 713,377 | | | $ | 204,934 | | | $ | 141,501 | | | $ | (161,770 | ) | | $ | 898,042 | |
| Capital expenditures | | $ | 10,517 | | | $ | 4,700 | | | $ | 15,542 | | | $ | - | | | $ | 30,759 | |
| | | Six Months Ended April 30, 2025 | |
| (in thousands) | | US Concrete Pumping | | | US Concrete Waste Management Services | | | UK Operations | | | Other / Eliminations | | | Total | |
| Segment Revenue: (1) | | $ | 119,022 | | | $ | 34,750 | | | $ | 26,632 | | | | | | | $ | 180,404 | |
| | | | | | | | | | | | | | | | | | | | | |
| Segment expenses: | | | | | | | | | | | | | | | | | | | | |
| Segment employee cost of operation expenses (2)(3) | | | 41,399 | | | | 6,388 | | | | 8,306 | | | | | | | | 56,093 | |
| Repairs & maintenance (2) | | | 8,538 | | | | 1,828 | | | | 1,616 | | | | | | | | 11,982 | |
| Fuel (2) | | | 6,343 | | | | 1,388 | | | | 2,435 | | | | | | | | 10,166 | |
| Segment employee G&A expenses (2)(4) | | | 15,102 | | | | 4,811 | | | | 2,884 | | | | | | | | 22,797 | |
| Other segment items (5) | | | 14,535 | | | | 4,389 | | | | 3,695 | | | | | | | | 22,619 | |
| Total segment adjusted EBITDA | | $ | 33,105 | | | $ | 15,946 | | | $ | 7,696 | | | | | | | $ | 56,747 | |
| | | | | | | | | | | | | | | | | | | | | |
| Reconciliation of segment adjusted EBITDA to income before taxes: | | | | | | | | | | | | | | | | | | | | |
| Depreciation and amortization (6) | | | | | | | | | | | | | | | | | | $ | 26,784 | |
| Interest expense and amortization of deferred financing costs, net of interest income | | | | | | | | | | | | | | | | | | | 14,096 | |
| Unallocated corporate expenses | | | | | | | | | | | | | | | | | | | 17,239 | |
| Loss on debt extinguishment | | | | | | | | | | | | | | | | | | | 1,392 | |
| Stock-based compensation | | | | | | | | | | | | | | | | | | | 905 | |
| Other income, net | | | | | | | | | | | | | | | | | | | (62 | ) |
| Other adjustments | | | | | | | | | | | | | | | | | | | 74 | |
| Loss before taxes | | | | | | | | | | | | | | | | | | $ | (3,681 | ) |
| | | | | | | | | | | | | | | | | | | | | |
| Other segment disclosures: | | | | | | | | | | | | | | | | | | | | |
| Total assets (at period end) | | $ | 704,851 | | | $ | 195,133 | | | $ | 122,063 | | | $ | (143,257 | ) | | $ | 878,790 | |
| Capital expenditures | | $ | 6,712 | | | $ | 6,229 | | | $ | 6,505 | | | $ | 45 | | | $ | 19,491 | |
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