Inventories, net (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) oz	Dec. 31, 2021 USD ($) oz
Inventories, net	$ 1,963,000	$ 1,608,000
Rodeo Project
Dore inventory	506,000	481,000
In-process inventory	815,000	668,000
Material and supplies	642,000	459,000
Inventories, net	1,963,000	1,608,000
Capitalized depreciation and amortization	24,000	21,000
Obsolescence allowance	$ 300,000	$ 300,000
Dore inventory gold | oz	375	626
Dore inventory silver | oz	1,379	1,958