XML 18 R7.htm IDEA: XBRL DOCUMENT v3.25.3

Nature of Operations	9 Months Ended
	Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations Castellum, Inc. (the “Company”) is focused on building a large, successful technology company in the areas of cybersecurity, information technology, electronic warfare, information warfare, and information operations with businesses in the defense, federal civilian, state and local governments, and commercial markets (the "Markets"). Services include intelligence analysis, software development, software engineering, program management, strategic and mission planning, information assurance, cybersecurity and policy support, data analytics, and model based systems engineering ("MBSE"). These services, which largely focus on securing data and establishing related policies, are applicable to customers in the United States ("U.S.") government, financial services, healthcare, and other users of large data applications. The services can be delivered to legacy customer owned networks, or customers who rely upon cloud-based infrastructures. Since November 2019, the Company has made the following acquisitions that specialize in the areas noted above: •Corvus Consulting, LLC (“Corvus”), •Mainnerve Federal Services, Inc. dba MFSI Government Group (“MFSI"), •Merrison Technologies, LLC ("Merrison"), •Specialty Systems, Inc. (“SSI”), •the business assets of Pax River from The Albers Group (“Pax River”), •Lexington Solutions Group, LLC (“LSG”), and •Global Technology and Management Resources, Inc. ("GTMR"). The Company works with multiple investment bankers and contacts within its business network to identify potential acquisitions. With the exception of Pax River, all of these acquisitions were considered business combinations under Topic 805 Business Combinations of the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”). See Note 3, “Disposition” for detail on the disposition of MFSI in 2024.

X

- Definition

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482836/275-10-55-4

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482836/275-10-55-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 10
-Topic 275
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-1

+ Details

Name:	us-gaap_NatureOfOperations
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration