Cover - shares	9 Months Ended
	Sep. 30, 2025	Nov. 07, 2025
Document Information [Line Items]
Document Type	10-Q/A
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	001-39139
Entity Registrant Name	CURIOSITYSTREAM INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-1797523
Entity Address, Address Line One	8484 Georgia Ave
Entity Address, Address Line Two	Suite 700
Entity Address, City or Town	Silver Spring
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20910
City Area Code	301
Local Phone Number	755-2050
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		58,298,507
Entity Central Index Key	0001776909
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
Amendment Flag	true
Amendment Description	This Amendment No. 1 to the Quarterly Report on Form 10-Q (this “Amendment”) of CuriosityStream Inc. (the “Company” or “we”) amends the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2025, which was originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on November 13, 2025 (the “Original Q3 Form 10-Q”). We are filing this Amendment to revise Part II “Item 5. Other Information” of the Original Q3 Form 10-Q by adding Rule 10b5-1 trading arrangements entered into during the subject period by each of Theresa Cudahy, the Company’s Chief Operating Officer, and Jonathan Huberman, a director of the Company, which were inadvertently omitted from the disclosure included in the Original Q3 Form 10-Q.In addition, as required by Rule 12b-15 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), new certifications by the Company’s principal executive officer and principal financial officer are filed herewith as Exhibits 31.1 and 31.2 to this Amendment, respectively, pursuant to Rule 13a-14(a) or 15d-14(a) of the Exchange Act. Because no financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. In addition, because no financial statements have been included in this Amendment, we are not filing new, currently dated certifications pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) (Section 906 of the Sarbanes-Oxley Act of 2002).Except as specifically noted above, this Amendment does not modify or update disclosures in the Original Q3 Form 10-Q. This Amendment does not reflect events occurring after the filing of the Original Q3 Form 10-Q or modify or update any related or other disclosures, other than those discussed herein. Accordingly, this Amendment should be read in conjunction with the Original Q3 Form 10-Q and the Company’s other filings with the SEC subsequent to the filing of the Original Q3 Form 10-Q.
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.0001
Trading Symbol	CURI
Security Exchange Name	NASDAQ
Warrant
Document Information [Line Items]
Title of 12(b) Security	Warrants, each exercisable for one share of Common Stock at an exercise price of $11.50 per share
Trading Symbol	CURIW
Security Exchange Name	NASDAQ