Note 1 - Principles of Consolidation and Basis of Presentation	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1 – Principles of Consolidation and Basis of Presentation The interim consolidated financial statements included herein have been prepared by Rush Enterprises, Inc. and its subsidiaries (collectively referred to as the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). All adjustments have been made to the accompanying interim consolidated financial statements, which, in the opinion of the Company’s management, are necessary for a fair presentation of its operating results. All adjustments are of a normal recurring nature. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. It is recommended that these interim consolidated financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. Results of operations for interim periods are not necessarily indicative of results that may be expected for any other interim periods or the full fiscal year. COVID-19 Risks and Uncertainties While the COVID-19 pandemic may not be over, business conditions have improved significantly since the onset of the pandemic in the second quarter of 2020. However, our industry continues to be impacted by supply chain issues generally attributable to the COVID-19 pandemic that are negatively affecting new commercial vehicle production and the availability of aftermarket parts. The Company is unable to predict the impact that the COVID-19 pandemic will have on its future business and operating results due to numerous uncertainties, including the duration of the COVID-19 pandemic and its effect on global economic trends and the various supply chains serving the commercial vehicle industry.

Note 1 - Principles of Consolidation and Basis of Presentation

3 Months Ended

Mar. 31, 2022

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

1 – Principles of Consolidation and Basis of Presentation

The interim consolidated financial statements included herein have been prepared by Rush Enterprises, Inc. and its subsidiaries (collectively referred to as the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). All adjustments have been made to the accompanying interim consolidated financial statements, which, in the opinion of the Company’s management, are necessary for a fair presentation of its operating results. All adjustments are of a normal recurring nature. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. It is recommended that these interim consolidated financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. Results of operations for interim periods are not necessarily indicative of results that may be expected for any other interim periods or the full fiscal year.

COVID-19 Risks and Uncertainties

While the COVID-19 pandemic may not be over, business conditions have improved significantly since the onset of the pandemic in the second quarter of 2020. However, our industry continues to be impacted by supply chain issues generally attributable to the COVID-19 pandemic that are negatively affecting new commercial vehicle production and the availability of aftermarket parts. The Company is unable to predict the impact that the COVID-19 pandemic will have on its future business and operating results due to numerous uncertainties, including the duration of the COVID-19 pandemic and its effect on global economic trends and the various supply chains serving the commercial vehicle industry.