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Cover - USD ($)
12 Months Ended
Dec. 31, 2020
Mar. 22, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2020    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-38387    
Entity Registrant Name HYCROFT MINING HOLDING CORP    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 82-2657796    
Entity Address, Address Line One 8181 E. Tufts Avenue, Suite 510    
Entity Address, City or Town Denver    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80237    
City Area Code 303    
Local Phone Number 253-3267    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
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 Public Float     $ 86,679,426
Entity Common Stock, Shares Outstanding   59,901,306  
Amendment Flag false    
Entity Central Index Key 0001718405    
Documents Incorporated by Reference Portion of the registrant's Proxy Statement of the 2021 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, 2020.    
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