Note 1 - Basis of Presentation	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Basis of Presentation The condensed consolidated financial statements included herein have been prepared by Granite Construction Incorporated (“we,” “us,” “our,” the “Company” or “Granite”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), are unaudited and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2021 (“Annual Report”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted. Further, the condensed consolidated financial statements reflect, in the opinion of management, all normal recurring adjustments necessary to state fairly our financial position at March 31, 2022 and 2021 and the results of our operations and cash flows for the periods presented. The December 31, 2021 condensed consolidated balance sheet data included herein was derived from audited consolidated financial statements, but does not include all disclosures required by U.S. GAAP. We prepared the accompanying condensed consolidated financial statements on the same basis as our annual consolidated financial statements, except for the adoption of Accounting Standards Update (“ASU”) 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”) on January 1, 2022, the impact of which is described in Note 2. Reclassifications: Certain reclassifications of prior period amounts have been made to conform to the current period presentation. As discussed in more detail in Note 3, we concluded that our former Water and Mineral Services operating group (“WMS”) met the criteria for held for sale during the fourth quarter of 2021 and met the criteria for discontinued operation classification. As a result, WMS is presented in the condensed consolidated statements of operations as discontinued operations for all periods presented. Current and non-current assets and liabilities of these businesses are presented in the condensed consolidated balance sheets as assets and liabilities held for sale. Our operations are typically affected more by weather conditions during the first and fourth quarters of our fiscal year which may alter our construction schedules and can create variability in our revenues and profitability. Therefore, the results of operations for the three months ended March 31, 2022 are not necessarily indicative of the results to be expected for the full year.

Note 1 - Basis of Presentation

3 Months Ended

Mar. 31, 2022

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. Basis of Presentation

The condensed consolidated financial statements included herein have been prepared by Granite Construction Incorporated (“we,” “us,” “our,” the “Company” or “Granite”) pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), are unaudited and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2021 (“Annual Report”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted. Further, the condensed consolidated financial statements reflect, in the opinion of management, all normal recurring adjustments necessary to state fairly our financial position at March 31, 2022 and 2021 and the results of our operations and cash flows for the periods presented. The December 31, 2021 condensed consolidated balance sheet data included herein was derived from audited consolidated financial statements, but does not include all disclosures required by U.S. GAAP.

We prepared the accompanying condensed consolidated financial statements on the same basis as our annual consolidated financial statements, except for the adoption of Accounting Standards Update (“ASU”) 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity (“ASU 2020-06”) on January 1, 2022, the impact of which is described in Note 2.

Reclassifications: Certain reclassifications of prior period amounts have been made to conform to the current period presentation.

As discussed in more detail in Note 3, we concluded that our former Water and Mineral Services operating group (“WMS”) met the criteria for held for sale during the fourth quarter of 2021 and met the criteria for discontinued operation classification. As a result, WMS is presented in the condensed consolidated statements of operations as discontinued operations for all periods presented. Current and non-current assets and liabilities of these businesses are presented in the condensed consolidated balance sheets as assets and liabilities held for sale.

Our operations are typically affected more by weather conditions during the first and fourth quarters of our fiscal year which may alter our construction schedules and can create variability in our revenues and profitability. Therefore, the results of operations for the three months ended March 31, 2022 are not necessarily indicative of the results to be expected for the full year.