Segment Information (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 31,676,000			$ 12,291,000			$ 86,713,000	$ 31,051,000
Cost of sales	43,660,000			25,770,000			106,563,000	81,501,000
Other operating costs	6,675,000			11,135,000			17,353,000	23,760,000
Loss from operations	(18,659,000)			(24,614,000)			(37,203,000)	(74,210,000)
Interest expense, net of capitalized interest - Note 9	(5,461,000)			(4,319,000)			(15,176,000)	(39,278,000)
Fair value adjustment to warrants - Notes 11 and 18	812,000			(3,354,000)			10,956,000	(4,276,000)
Interest income	0			9,000			0	156,000
Loss before income taxes	(23,308,000)			(32,278,000)			(41,423,000)	(117,608,000)
Income tax benefit - Note 15	95,000			0			95,000	0
Net loss	(23,213,000)	$ (8,427,000)	$ (9,688,000)	(32,278,000)	$ (50,712,000)	$ (34,618,000)	(41,328,000)	(117,608,000)
Hycroft Mine
Segment Reporting Information [Line Items]
Revenues	31,676,000			12,291,000			86,713,000	31,051,000
Cost of sales	43,660,000			25,770,000			106,563,000	81,501,000
Other operating costs	3,362,000			5,424,000			5,082,000	5,611,000
Loss from operations	(15,346,000)			(18,903,000)			(24,932,000)	(56,061,000)
Interest expense, net of capitalized interest - Note 9	0			0			0	0
Fair value adjustment to warrants - Notes 11 and 18	0			0			0	0
Interest income				9,000				156,000
Loss before income taxes	(15,346,000)						(24,932,000)
Income tax benefit - Note 15	0						0
Net loss	(15,346,000)			(18,894,000)			(24,932,000)	(55,905,000)
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	0			0			0	0
Cost of sales	0			0			0	0
Other operating costs	3,313,000			5,711,000			12,271,000	18,149,000
Loss from operations	(3,313,000)			(5,711,000)			(12,271,000)	(18,149,000)
Interest expense, net of capitalized interest - Note 9	(5,461,000)			(4,319,000)			(15,176,000)	(39,278,000)
Fair value adjustment to warrants - Notes 11 and 18	812,000			(3,354,000)			10,956,000	(4,276,000)
Interest income				0				0
Loss before income taxes	(7,962,000)						(16,491,000)
Income tax benefit - Note 15	95,000						95,000
Net loss	$ (7,867,000)			$ (13,384,000)			$ (16,396,000)	$ (61,703,000)