DESCRIPTION OF BUSINESS	9 Months Ended
DESCRIPTION OF BUSINESS	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS	DESCRIPTION OF BUSINESS SpringBig Holdings, Inc. and its wholly-owned subsidiaries (the “Company,” “we,” “us,”, “our”, or “SpringBig”) developed a software platform that provides marketing and customer engagement services to cannabis dispensaries and brands throughout the United States and Canada. The Company allows merchants to provide loyalty plans and rewards directly to consumers through an internet portal and mobile applications. Our operational headquarters are in Boca Raton, Florida, with additional offices located in the United States and Canada. The Company has one primary direct wholly-owned subsidiary, SpringBig, Inc. On June 14, 2022 (the “Closing Date”), SpringBig Holdings, Inc. (formerly known as Tuatara Capital Acquisition Corporation (“Tuatara” or “TCAC”)), consummated the business combination of SpringBig, Inc. (“Legacy SpringBig”) and HighJump Merger Sub, Inc., the wholly-owned subsidiary of Tuatara, pursuant to the Amended and Restated Agreement of Plan Merger, dated as of April 14, 2022, as amended, by and among Tuatara, HighJump Merger Sub, Inc. and Legacy SpringBig. Prior to the closing of the business combination (the “Closing”), Tuatara changed its jurisdiction of incorporation by deregistering as a Cayman Islands exempted company and continuing and domesticating as a corporation incorporated under the laws of the State of Delaware. In connection with the Closing, the registrant changed its name from Tuatara Capital Acquisition Corporation to “SpringBig Holdings, Inc.” SpringBig will continue the existing business operations of Legacy SpringBig as a publicly traded company. See Note 10, Business Combination, to these consolidated financial statements for further information. While the legal acquirer in the business combination is SpringBig for financial accounting and reporting purposes under U.S. GAAP, Legacy SpringBig is the accounting acquirer, with the merger accounted for as a “reverse recapitalization.” A reverse recapitalization does not result in a new basis of accounting, and the financial statements of the combined entity represent the continuation of the financial statements of Legacy SpringBig. Under this accounting method, SpringBig is treated as the “acquired” company and Legacy SpringBig is the accounting acquirer, with the transaction treated as a recapitalization of Legacy SpringBig. SpringBig’s assets, liabilities and results of operations were consolidated with Legacy SpringBig’s beginning on the date of the business combination. Except for certain warrant liabilities, the assets and liabilities of SpringBig were recognized at historical cost (which is consistent with carrying value) and were not material, with no goodwill or other intangible assets recorded. The warrant liabilities, which are discussed in Note 13, Warrant Liabilities, were recorded at fair value. The consolidated assets, liabilities, and results of operations of Legacy SpringBig became the historical financial statements, and operations prior to the closing of the business combination presented for comparative purposes are those of Legacy SpringBig. Pre-merger shares of common stock and preferred stock of Legacy SpringBig were converted to shares of common stock of the combined company using the conversion ratio of 0.59289 and for comparative purposes, the shares and net loss per share of Legacy SpringBig prior to the merger have been retroactively restated using the conversion ratio. Beginning June 15, 2022, the ticker symbols for the Company’s common stock and publicly-traded warrants were changed to “SBIG” and “SBIGW,” respectively, and commenced trading on The Nasdaq Capital Market. The Company received net proceeds of $18.8 million, with gross proceeds of $25.1 million, which were in addition to the $7.0 million in Convertible Notes proceeds, which were received in February 2022 in connection with Legacy SpringBig’s issuance of such notes (and which Convertible Notes and the interest due thereon were converted into common stock in connection with the business combination. See Note 11, 15% Convertible Promissory Notes, to these consolidated financial statements). Of the amount received at the Closing, approximately $8.8 million represented cash from the TCAC trust related to unredeemed shares; $6.1 million represented proceeds from the subscription for common stock from certain investors (the “PIPE Financing”), and $10.0 million from the Secured Convertible Note (defined below). The Company incurred additional cash and non cash expenses totaling $8.7 million, resulting in net business combination proceeds of $10.1 million. On September 1, 2023, (i) the Board of Directors of SpringBig Holdings, Inc. determined that it would not be in the best interest of the Company or its shareholders to meet the continued listing requirements of the Nasdaq Capital Market, (ii) the Company notified the Nasdaq Stock Market LLC (“Nasdaq”) that it was withdrawing its appeal of the Nasdaq Listings Qualification staff’s delist determination dated March 7, 2023, for the Company’s failure to meet the market value of listed securities requirement in Nasdaq Listing Rule 5450(b)(2)(A) and (iii) the Company received a letter from Nasdaq confirming (a) the withdrawal of the appeal, (b) as a result of the withdrawal, the Company’s common stock and public warrants would be suspended at the open of business on September 5, 2023 and (c) Nasdaq would file a Form 25 Notification of Delisting with the SEC when all of its internal procedural periods have run. The letter also noted that the Company failed to meet the minimum bid price requirement in Nasdaq Listing Rule 5450(a)(1). The Company has taken the steps necessary so that its common stock is now quoted for trading on the OTCQX® Best Market and its public warrants are now quoted for trading on the OTC Market under their current trading symbols “SBIG” and “SBIGW,” respectively, following the delisting from trading on the Nasdaq Capital Market. The Company’s common stock started trading on the OTCQX® Best Market on September 6, 2023. The Company remains a reporting company under the Securities Exchange Act of 1934, as amended (the “Exchange Act”).