Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-38387
Entity Registrant Name	HYCROFT MINING HOLDING CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-2657796
Entity Address, Address Line One	4300 Water Canyon Road
Entity Address, Address Line Two	Unit 1
Entity Address, City or Town	Winnemucca
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89445
City Area Code	775
Local Phone Number	304-0260
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 71,518,397
Entity Common Stock, Shares Outstanding		196,803,459
Documents Incorporated by Reference	Portion of the registrant's Proxy Statement of the 2022 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant's fiscal year ended December 31, 2021.
Entity Central Index Key	0001718405
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Class A common stock
Document Information [Line Items]
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	HYMC
Security Exchange Name	NASDAQ
Warrants to purchase common stock
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock
Trading Symbol	HYMCW
Security Exchange Name	NASDAQ
Warrants to purchase common stock
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock
Trading Symbol	HYMCZ
Security Exchange Name	NASDAQ
Warrants to purchase common stock
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock
Trading Symbol	HYMCL
Security Exchange Name	NASDAQ