v3.25.3

Cover		9 Months Ended
Cover	Aug. 08, 2023	Sep. 30, 2021
Cover [Abstract]
Document Type	8-K
Document Period End Date	Nov. 06, 2025
Entity Registrant Name	Expensify, Inc.
Entity Incorporation, State	DE
Entity File Number	001-41043
Entity Tax Identification Number	27-0239450
Entity Address, Street	88 Kearny St, Ste 1600
Entity Address, City	San Francisco
Entity Address, State	CA
Entity Address, Postal Zip Code	94108
City Area Code	971
Local Phone Number	365-3939
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Title of each class	Class A Common Stock, par value $0.0001 per share
Trading Symbol(s)	EXFY
Name of each exchange on which registered	NASDAQ
Entity Emerging Growth Company	false
Entity Central Index Key	0001476840
Amendment Flag	false
Entity Addresses [Line Items]
Entity Address, Postal Zip Code	94108
Entity Address, Street	88 Kearny St, Ste 1600
Entity Address, City	San Francisco
Entity Address, State	CA
Former Address
Cover [Abstract]
Entity Address, Street		401 SW 5th Ave
Entity Address, City		Portland
Entity Address, State		OR
Entity Address, Postal Zip Code		97204
Entity Addresses [Line Items]
Entity Address, Postal Zip Code		97204
Entity Address, Street		401 SW 5th Ave
Entity Address, City		Portland
Entity Address, State		OR

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

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- Definition

Area code of city

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No definition available.

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Cover page.

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For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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No definition available.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

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No definition available.

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Address Line 1 such as Attn, Building Name, Street Name

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No definition available.

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Name of the City or Town

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No definition available.

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Code for the postal or zip code

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Name of the state or province.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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Indicate if registrant meets the emerging growth company criteria.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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No definition available.

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Two-character EDGAR code representing the state or country of incorporation.

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No definition available.

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
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- Definition

Local phone number for entity.

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No definition available.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Exchange Act
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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Title of a 12(b) registered security.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Name of the Exchange on which a security is registered.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Exchange Act
-Number 240
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-Subsection 12

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Trading symbol of an instrument as listed on an exchange.

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No definition available.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Securities Act
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-Section 425

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Expensify, Inc. 8-K