Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue - Note 14		$ 0			$ 8,758			$ 0	$ 21,755
Cost of sales		0			11,237			0	35,026
Operating costs, other operating costs		13,571			10,145			36,671	19,858
Loss from operations		(13,571)			(12,624)			(36,671)	(33,129)
Interest expense – Note 9		(4,698)			(4,459)			(13,721)	(14,003)
Interest income		2,100			826			6,159	846
Fair value adjustments to warrants – Notes 10 and 18		1			1,133			182	(482)
Gain (loss) on sale of equipment and supplies inventories, net of commissions	[1]	456			(725)			541	(123)
Net loss		(15,712)	$ (13,889)	$ (13,909)	(15,849)	$ (8,982)	$ (22,060)	(43,510)	(46,891)
Total Assets		211,813						211,813		$ 248,954
Hycroft Mine
Segment Reporting Information [Line Items]
Revenue - Note 14					8,758				21,755
Cost of sales					11,237				35,026
Operating costs, other operating costs		10,806			7,113			26,861	8,506
Loss from operations		(10,806)			(9,592)			(26,861)	(21,777)
Interest expense – Note 9		0			(3)			0	(9)
Interest income		638			153			1,714	173
Fair value adjustments to warrants – Notes 10 and 18		0			0			0	0
Gain (loss) on sale of equipment and supplies inventories, net of commissions		456			(725)			541	(123)
Net loss		(9,712)			(10,167)			(24,606)	(21,736)
Total Assets		74,746						74,746		102,057
Corporate and Other
Segment Reporting Information [Line Items]
Revenue - Note 14					0				0
Cost of sales					0				0
Operating costs, other operating costs		2,765			3,032			9,810	11,352
Loss from operations		(2,765)			(3,032)			(9,810)	(11,352)
Interest expense – Note 9		(4,698)			(4,456)			(13,721)	(13,994)
Interest income		1,462			673			4,445	673
Fair value adjustments to warrants – Notes 10 and 18		1			1,133			182	(482)
Gain (loss) on sale of equipment and supplies inventories, net of commissions		0			0			0	0
Net loss		(6,000)			$ (5,682)			(18,904)	$ (25,155)
Total Assets		$ 137,067						$ 137,067		$ 146,897

[1] Certain items from prior years were reclassified in the financial statements to conform with the current year presentation.