Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company has evaluated subsequent events through the date of the audit report and determined that there have been no events, other than those disclosed below, that have occurred that would require adjustment to the disclosures in the consolidated financial statements. Proposed Merger with Wholly-Owned Subsidiary of Zip On February 28, 2022, the Company entered into the Zip Merger Agreement, pursuant to which, upon the terms and subject to the conditions thereof, the Merger Sub will be merged with and into the Company, with the Company surviving the merger as a wholly-owned subsidiary of Zip. Subject to the terms and conditions of the Zip Merger Agreement, each share of the Company’s common stock (including each share of the Company’s common stock in respect of which a Company CDI (as defined in the Zip Merger Agreement) has been issued) issued and outstanding immediately prior to the Effective Time (other than shares of the Company’s common stock that are held by the Company (or any of its subsidiaries), Zip (or any of its subsidiaries or Merger Sub) shall be cancelled and converted into the right to receive, at the election of the Company’s stockholders (subject to the immediately following sentence), (a) a number of Zip ordinary shares equal to the “Exchange Ratio” or (b) a number of Zip ADRs representing a number of Zip ordinary shares equal to the Exchange Ratio. Any person who is an Australian Stockholder (as defined in the Zip Merger Agreement) will only be entitled to consideration in the form of Zip ordinary shares. The Zip Merger Agreement includes customary representations, warranties and covenants of the Company, Zip and Merger Sub. Subject to the terms of the Zip Merger Agreement and certain exceptions, the Company and Zip have agreed to operate their respective businesses in the ordinary course consistent with past practice and use commercially reasonable efforts to maintain their respective business organizations and advantageous business relationships until the closing of the transaction. Concurrently with the execution and delivery of the Zip Merger Agreement, certain significant stockholders of both the Company (Charles Youakim and Paul Paradis) and Zip (Larry Diamond and Peter Gray) entered into support agreements pursuant to which, among other things, they agreed to vote all of their stock or ordinary shares, as applicable, in favor of the transaction. Recent Amendment to Credit Agreement and Guaranty On February 25, 2022, the Company entered into Amendment No. 3 (the “Credit Agreement Amendment”) to that certain Revolving Credit and Security Agreement, dated as of February 10, 2021, as amended as of April 29, 2021, as further amended as of October 15, 2021, by and among Sezzle Funding SPE II, LLC (the “Borrower”), Goldman Sachs Bank USA (the “Administrative Agent”) and the other lenders party thereto from time to time (the “Existing Credit Agreement”). The Credit Agreement Amendment amends, among other things, certain definitions and events of default under the Existing Credit Agreement to clarify the terms of applicable cure periods involving replacement of the Servicer or Backup Servicer (each as defined therein). On February 25, 2022, the Company also entered into Amendment No. 1 (the “Limited Guaranty Amendment”) to that certain Limited Guaranty and Indemnity Agreement, dated as of February 10, 2021, by and among the Company (as “Limited Guarantor” thereunder) and the Administrative Agent (the “Existing Limited Guaranty”). The Limited Guaranty Amendment amends the Existing Limited Guaranty to adjust and provide alternatives for certain Limited Guarantor financial covenant measurement thresholds and requires certain Limited Guarantor compliance reporting obligations during a defined modification period. The length of the modification period is dependent in part upon the ongoing status of the Merger Agreement and progress toward closing of the merger.