Schedule of Segment Reporting Information, by Segment [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | 2018 through April 30, 2019 | | | 2018 through December 5, 2018 | | | 2017 through April 30, 2018 | | Revenue | | | | | | | | | | | | | | | | | | | | | Brundage-Bone | | $ | 42,548 | | | $ | 37,717 | | | $ | 66,615 | | | $ | 16,624 | | | $ | 73,136 | | Camfaud | | | 12,689 | | | | 12,100 | | | | 18,504 | | | | 5,143 | | | | 22,828 | | Eco-Pan | | | 6,751 | | | | 6,587 | | | | 10,839 | | | | 2,629 | | | | 13,242 | | | | $ | 61,988 | | | $ | 56,404 | | | $ | 95,958 | | | $ | 24,396 | | | $ | 109,206 | | | | | | | | | | | | | | | | | | | | | | | EBITDA | | | | | | | | | | | | | | | | | | | | | Brundage-Bone | | $ | 5,812 | | | $ | 9,380 | | | $ | 11,348 | | | $ | (24,565 | ) | | $ | 18,003 | | Camfaud | | | 4,298 | | | | 4,184 | | | | 4,431 | | | | 1,587 | | | | 7,033 | | Eco-Pan | | | 2,580 | | | | 2,895 | | | | 4,161 | | | | 388 | | | | 5,849 | | Corporate | | | 687 | | | | 625 | | | | 1,008 | | | | 180 | | | | 1,250 | | | | $ | 13,377 | | | $ | 17,084 | | | $ | 20,948 | | | $ | (22,410 | ) | | $ | 32,135 | | | | | | | | | | | | | | | | | | | | | | | Interest expense, net | | | | | | | | | | | | | | | | | | | | | Brundage-Bone | | $ | 8,578 | | | $ | 4,062 | | | $ | 13,712 | | | $ | 1,154 | | | $ | 8,079 | | Camfaud | | | 740 | | | | 1,064 | | | | 1,198 | | | | 490 | | | | 2,134 | | Eco-Pan | | | - | | | | - | | | | - | | | | - | | | | - | | Corporate | | | - | | | | - | | | | - | | | | - | | | | - | | | | $ | 9,318 | | | $ | 5,126 | | | $ | 14,910 | | | $ | 1,644 | | | $ | 10,213 | |
| | | | | | | | | | | | | | | | | | | | | 2018 through April 30, 2019 | | | 2018 through December 5, 2018 | | | 2017 through April 30, 2018 | | Depreciation and amortization | | | | | | | | | | | | | | | | | | | | | Brundage-Bone | | $ | 6,706 | | | $ | 3,523 | | | $ | 11,532 | | | $ | 1,635 | | | $ | 6,906 | | Camfaud | | | 2,659 | | | | 2,049 | | | $ | 4,297 | | | | 890 | | | | 4,050 | | Eco-Pan | | | 2,703 | | | | 505 | | | $ | 4,575 | | | | 163 | | | | 1,010 | | Corporate | | | 64 | | | | 61 | | | | 102 | | | | 25 | | | | 122 | | | | $ | 12,132 | | | $ | 6,138 | | | $ | 20,506 | | | $ | 2,713 | | | $ | 12,088 | | | | | | | | | | | | | | | | | | | | | | |
Transaction costs including debt extinguishment | | | | | | | | | | | | | | | | | | Corporate | | $ | 1,282 | | | $ | 1,117 | | | $ | 1,282 | | | $ | 30,562 | | | $ | 1,125 | | | | $ | 1,282 | | | $ | 1,117 | | | $ | 1,282 | | | $ | 30,562 | | | $ | 1,125 | |
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Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | 2018 through April 30, 2019 | | | 2018 through December 5, 2018 | | | 2017 through April 30, 2018 | | Revenues | | | | | | | | | | | | | | | | | | | | | U.S. | | $ | 49,299 | | | $ | 44,304 | | | $ | 77,454 | | | $ | 19,253 | | | $ | 86,378 | | U.K. | | | 12,689 | | | | 12,100 | | | | 18,504 | | | | 5,143 | | | | 22,828 | | | | $ | 61,988 | | | $ | 56,404 | | | $ | 95,958 | | | $ | 24,396 | | | $ | 109,206 | |
| | | | | | | | | | | | | | | | | | | | | Long Lived Assets | | | | | | | | | U.S. | | $ | 204,394 | | | $ | 167,368 | | U.K. | | | 40,470 | | | | 34,547 | | | | $ | 244,864 | | | $ | 201,915 | |
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