Note 4 - Revisions in Estimates	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Revisions in Estimates [Text Block]	4. Revisions in Estimates Our profit recognition related to construction contracts is based on estimates of transaction price and costs to complete each project. These estimates can vary significantly in the normal course of business as projects progress, circumstances develop and evolve, and uncertainties are resolved. Changes in estimates of transaction price and costs to complete may result in the reversal of previously recognized revenue if the current estimate adversely differs from the previous estimate. In addition, the estimated or actual recovery related to estimated costs associated with unresolved affirmative claims and back charges may be recorded in future periods or may be at values below the associated cost, which can cause fluctuations in the gross profit impact from revisions in estimates. When we experience significant revisions in our estimates, we undergo a process that includes reviewing the nature of the changes to ensure that there are no material amounts that should have been recorded in a prior period rather than as revisions in estimates for the current period. For revisions in estimates, generally we use the cumulative catch-up method for changes to the transaction price that are part of a single performance obligation. Under this method, revisions in estimates are accounted for in their entirety in the period of change. There can be no assurance that we will not experience further changes in circumstances or otherwise be required to revise our estimates in the future. In our review of these changes for the three months ended March 31, 2022 and 2021, we did not identify any material amounts that should have been recorded in a prior period. There were no increases or decreases from revisions in estimates, which individually had an impact of $5.0 million or more on gross profit for the three months ended March 31, 2022. During the three months ended March 31, 2021, there was one project with a decrease from revisions in estimates that had an impact to gross profit of $5.3 million, to net loss from continuing operations of $4.1 million and to diluted loss per share from continuing operations of $0.09. This decrease was due to additional costs from lower productivity than originally anticipated and weather impacts.

Note 4 - Revisions in Estimates

3 Months Ended

Mar. 31, 2022

4. Revisions in Estimates

Our profit recognition related to construction contracts is based on estimates of transaction price and costs to complete each project. These estimates can vary significantly in the normal course of business as projects progress, circumstances develop and evolve, and uncertainties are resolved. Changes in estimates of transaction price and costs to complete may result in the reversal of previously recognized revenue if the current estimate adversely differs from the previous estimate. In addition, the estimated or actual recovery related to estimated costs associated with unresolved affirmative claims and back charges may be recorded in future periods or may be at values below the associated cost, which can cause fluctuations in the gross profit impact from revisions in estimates.

When we experience significant revisions in our estimates, we undergo a process that includes reviewing the nature of the changes to ensure that there are no material amounts that should have been recorded in a prior period rather than as revisions in estimates for the current period. For revisions in estimates, generally we use the cumulative catch-up method for changes to the transaction price that are part of a single performance obligation. Under this method, revisions in estimates are accounted for in their entirety in the period of change. There can be no assurance that we will not experience further changes in circumstances or otherwise be required to revise our estimates in the future.

In our review of these changes for the three months ended March 31, 2022 and 2021, we did not identify any material amounts that should have been recorded in a prior period.

There were no increases or decreases from revisions in estimates, which individually had an impact of $5.0 million or more on gross profit for the three months ended March 31, 2022. During the three months ended March 31, 2021, there was one project with a decrease from revisions in estimates that had an impact to gross profit of $5.3 million, to net loss from continuing operations of $4.1 million and to diluted loss per share from continuing operations of $0.09. This decrease was due to additional costs from lower productivity than originally anticipated and weather impacts.