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Note 8 - Revenue (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

		Three Months Ended June 30,								Six Months Ended June 30,
		2022				2021				2022				2021
Over time (Engineered Steel Pressure Pipe)		$	77,068			$	58,748			$	151,783			$	118,805
Point in time (Precast Infrastructure and Engineered Systems)			41,454				15,064				76,070				27,318
Net sales		$	118,522			$	73,812			$	227,853			$	146,123

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

+ Details

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- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration