Note 7 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jan. 31, 2021 |
Apr. 30, 2020 |
Jan. 31, 2020 |
Apr. 30, 2020 |
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| Amortization of Intangible Assets, Total | $ 6,913 | $ 8,593 | ||
| US Concrete Pumping [Member] | ||||
| Reporting Unit, Percentage of Carrying Amount In Excess of Fair Value | 6.90% | 6.90% | ||
| Goodwill, Impairment Loss | $ 38,500 | $ 43,500 | ||
| UK Operations [Member] | ||||
| Reporting Unit, Percentage of Carrying Amount In Excess of Fair Value | 14.80% | 14.80% | ||
| Goodwill, Impairment Loss | $ 14,400 | $ 14,400 | ||
| Brundage-Bone Concrete Pumping, Trade Name [Member] | ||||
| Indefinite-lived Intangible Assets, Carrying Value in Excess of Fair Value, Percent | 11.80% | 11.80% | ||
| Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 5,000 | |||
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- Definition Percentage of carrying value of intangible asset in excess of fair value. No definition available.
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- Definition Percentage of carrying amount of reporting unit in excess of fair value. No definition available.
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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