Note 1 - Principles of Consolidation and Basis of Presentation	9 Months Ended
Sep. 30, 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. Recent Accounting Pronouncements In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848),” which provides temporary optional guidance to ease the potential financial reporting burden of the expected market transition away from LIBOR. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contract modifications, hedge accounting, and other transactions affected by reference rate reform if certain criteria are met through December 31, 2022. The Company does not expect this standard to have a material effect on its financial position, results of operations and related disclosures. COVID-19 Risks and Uncertainties While business conditions have improved significantly since the onset of the COVID-19 pandemic in the second quarter of 2020, 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. Foreign Currency Transactions The functional currency of the Company’s foreign subsidiary, Rush Truck Centres of Canada Limited (“RTC Canada”), is the local currency. Results of operations for RTC Canada are translated to USD using the average exchange rate on a monthly basis during each quarter. The assets and liabilities of RTC Canada are translated into USD using the exchange rate in effect on the balance sheet date. The related translation adjustments are recorded as a separate component of the Company’s Consolidated Statements of Shareholders’ Equity in accumulated other comprehensive income (loss).

Note 1 - Principles of Consolidation and Basis of Presentation

9 Months Ended

Sep. 30, 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.

Recent Accounting Pronouncements

In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848),” which provides temporary optional guidance to ease the potential financial reporting burden of the expected market transition away from LIBOR. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contract modifications, hedge accounting, and other transactions affected by reference rate reform if certain criteria are met through December 31, 2022. The Company does not expect this standard to have a material effect on its financial position, results of operations and related disclosures.

COVID-19 Risks and Uncertainties

While business conditions have improved significantly since the onset of the COVID-19 pandemic in the second quarter of 2020, 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.

Foreign Currency Transactions

The functional currency of the Company’s foreign subsidiary, Rush Truck Centres of Canada Limited (“RTC Canada”), is the local currency. Results of operations for RTC Canada are translated to USD using the average exchange rate on a monthly basis during each quarter. The assets and liabilities of RTC Canada are translated into USD using the exchange rate in effect on the balance sheet date. The related translation adjustments are recorded as a separate component of the Company’s Consolidated Statements of Shareholders’ Equity in accumulated other comprehensive income (loss).