v3.25.2

Cover Page	Jun. 03, 2025
Cover [Abstract]
Document Type	8-K/A
Document Period End Date	Jun. 03, 2025
Entity Registrant Name	ARQ, INC.
Entity Incorporation, State or Country Code	DE
Entity File Number	001-37822
Entity Tax Identification Number	27-5472457
Entity Address, Address Line One	8051 E. Maplewood Avenue
Entity Address, Address Line Two	Suite 210
Entity Address, City or Town	Greenwood Village
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80111
City Area Code	720
Local Phone Number	598-3500
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Title of 12(b) Security	Common stock, par value $0.001 per share
Trading Symbol	ARQ
Security Exchange Name	NASDAQ
Entity Emerging Growth Company	false
Entity Central Index Key	0001515156
Amendment Flag	true
Amendment Description	This Current Report on Form 8-K/A (this “Amendment”) amends the Current Report on Form 8-K filed by Arq, Inc. (the “Company”) with the U.S. Securities and Exchange Commission on June 6, 2025 (the “Original Form 8-K”). The Original Form 8-K reported the final voting results of the Company’s 2025 Annual Meeting of Stockholders held on June 3, 2025 (the “Annual Meeting”). The sole purpose of this Amendment is to disclose, in accordance with Item 5.07(d) of Form 8-K, the Company's decision regarding whether non-binding stockholder advisory votes on the compensation of the Company’s named executive officers (the “Say-on-Pay Vote”) should be held every one, two, or three years (the “Say-on-Frequency Proposal”). No other changes have been made to the Original Form 8-K.

Description of changes contained within amended document.

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Arq, Inc. 8-K/A