Insider Trading Arrangements	3 Months Ended	12 Months Ended
Insider Trading Arrangements	Dec. 31, 2025	Dec. 31, 2025
Trading Arrangements, by Individual [Table]
Material Terms of Trading Arrangement [Text Block]		*Item 9B.* Other Information** a. During the fourth quarter of 2025, none of our directors or executive officers adopted or terminated any “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement” (as each term is defined in Item 408(a) of Regulation S-K). b. As previously disclosed in the Current Report on Form 8-K filed with the U.S. SEC on March 19, 2026, SPAR Marketing Force, Inc. ("SMF"), a wholly owned subsidiary of the Company, issued a Senior Unsecured Promissory Note (the "Original Note") to PC Group, Inc. ("PC Group") evidencing a $4,000,000 unsecured loan arrangement. On March 27, 2026, SMF issued an Amended and Restated Senior Unsecured Promissory Note (the "New Note") to PC Group, which amends, restates and replaces, in its entirety, the Original Note. The New Note has substantially identical terms and conditions to the Original Note, except as follows: (a) the New Note is effective as of March 17, 2026 (the "Effective Date"); (b) at the maturity date of the New Note, $800,000, subject to adjustment as described in the New Note, will be credited against the outstanding loan amount; and (c) SMF will be required to make cash payments to maintain the value of the equity consideration issued pursuant to the New Note, up to a maximum of $800,000, if (x) the Company issues or sells common stock (or convertible equity securities) at a price below $0.80 per share and (y) on each anniversary of the Effective Date, if on such date the Company's common stock is trading at less than $0.80 per share. The foregoing description of the New Note does not purport to be complete and is qualified in its entirety by the terms and conditions of the New Note, which is filed as Exhibits 10.77, to this Annual Report on Form 10-K and incorporated herein by reference.
Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false

SPAR Group, Inc. 10-K