Concrete Pumping Holdings, Inc. Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	5 Months Ended
	Apr. 30, 2019
Building and Building Improvements [Member] \| Minimum [Member]
Estimated useful lives (Year)	15 years
Building and Building Improvements [Member] \| Maximum [Member]
Estimated useful lives (Year)	40 years
Assets Held under Capital Leases [Member]
Estimated useful lives (Year)	40 years
Furniture and Fixtures [Member] \| Minimum [Member]
Estimated useful lives (Year)	2 years
Furniture and Fixtures [Member] \| Maximum [Member]
Estimated useful lives (Year)	7 years
Machinery and Equipment [Member] \| Minimum [Member]
Estimated useful lives (Year)	3 years
Machinery and Equipment [Member] \| Maximum [Member]
Estimated useful lives (Year)	25 years
Transportation Equipment [Member] \| Minimum [Member]
Estimated useful lives (Year)	3 years
Transportation Equipment [Member] \| Maximum [Member]
Estimated useful lives (Year)	7 years