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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Apr. 01, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K/A    
Amendment Flag true    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Trading Symbol QRHC    
Entity Registrant Name Quest Resource Holding Corporation    
Entity Central Index Key 0001442236    
Current Fiscal Year End Date --12-31    
Entity Filer Category Non-accelerated Filer    
Entity Shell Company false    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Common Stock, Shares Outstanding   19,045,988  
Entity Public Float     $ 59,638,216
Entity File Number 001-36451    
Entity Tax Identification Number 51-0665952    
Entity Address, Address Line One 3481 Plano Parkway    
Entity Address, City or Town The Colony    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 75056    
City Area Code 972    
Local Phone Number 464-0004    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Stock, par value $.001 per share    
Entity Incorporation, State or Country Code NV    
Security Exchange Name NASDAQ    
Document Annual Report true    
Document Transition Report false    
ICFR Auditor Attestation Flag false    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE: See "Explanatory Note".

    
Auditor Firm ID 178    
Auditor Name Semple, Marchal & Cooper, LLP    
Auditor Location Phoenix, Arizona    
Amendment Description EXPLANATORY NOTE:We are filing this Amendment No. 1 on Form 10-K/A (this "Amendment No. 1") to amend our Annual Report on Form 10-K for the year ended December 31, 2021 as filed with the Securities and Exchange Commission (the "SEC") on March 17, 2022 (the "Original Form 10-K"). The purpose of this Amendment No. 1 is to present the information that was previously omitted from Part III of the Original Form 10-K because we no longer intend to file a definitive proxy statement for our annual meeting of stockholders within 120 days after the end of our fiscal year ended December 31, 2021.Except as otherwise expressly noted above, this Amendment No. 1 does not amend any other information set forth in the Original Form 10-K. This Amendment No. 1 continues to speak as of the date of the Original Form 10-K and, except where expressly noted, we have not updated the disclosures contained in the Original Form 10-K, including, among other things, the forward-looking statements, to reflect events that have occurred at a date subsequent to the date of the Original Form 10-K. Accordingly, this Amendment No. 1 should be read in conjunction with the Original Form 10-K and our other filings with the SEC.Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this Amendment No. 1 also contains new certifications by our principal executive officer and principal financial officer as required by Section 302 of the Sarbanes-Oxley Act of 2002. Accordingly, Item 15(b) of Part IV has been amended and restated in its entirety to include the currently dated certifications as exhibits.