Note 1 - Principles of Consolidation and Basis of Presentation	3 Months Ended
Mar. 31, 2024
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, 2023. 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. Restricted Cash Restricted cash consists of deposits for the statutory restriction on cash related to the Company’s captive insurance company of $3.1 million as of March 31, 2024. Stock Split On July 25, 2023, the Board of Directors of the Company declared a 3-for-2 stock split of the Company’s Class A common stock and Class B common stock, which was effected in the form of a stock dividend. On August 28, 2023, the Company distributed one additional share of stock for every two shares of Class A common stock, par value $0.01 per share, and Class B common stock, par value $0.01 per share, held by shareholders of record as of August 7, 2023. All share and per share data in this Form 10-Q have been adjusted and restated to reflect the stock split as if it occurred on the first day of the earliest period presented. Foreign Currency Transactions The functional currency of the Company’s foreign subsidiary, Rush Truck Centres of Canada Limited (“RTC Canada”), is the local currency, the Canadian dollar. 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

3 Months Ended

Mar. 31, 2024

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, 2023. 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.

Restricted Cash

Restricted cash consists of deposits for the statutory restriction on cash related to the Company’s captive insurance company of $3.1 million as of March 31, 2024.

Stock Split

On July 25, 2023, the Board of Directors of the Company declared a 3-for-2 stock split of the Company’s Class A common stock and Class B common stock, which was effected in the form of a stock dividend. On August 28, 2023, the Company distributed one additional share of stock for every two shares of Class A common stock, par value $0.01 per share, and Class B common stock, par value $0.01 per share, held by shareholders of record as of August 7, 2023. All share and per share data in this Form 10-Q have been adjusted and restated to reflect the stock split as if it occurred on the first day of the earliest period presented.

Foreign Currency Transactions

The functional currency of the Company’s foreign subsidiary, Rush Truck Centres of Canada Limited (“RTC Canada”), is the local currency, the Canadian dollar. 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).