| 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. |
