Commitments and Contingencies (Details) - USD ($)		12 Months Ended
	Apr. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Contingencies
Loss contingency		$ 0	$ 0
Velardena properties
Leases and Purchase Commitments
2020		23,000
2021		23,000
2022		23,000
2023		23,000
2024		23,000
Lease payments		78,000	78,000
Surface right agreement with local ejido
Leases and Purchase Commitments
Lease payments		58,000	51,000
El Quevar Project
Leases and Purchase Commitments
2020		30,000
2021		30,000
2022		30,000
2023		30,000
2024		30,000
Thereafter		30,000
Lease payments		36,000	57,000
Office space
Leases and Purchase Commitments
2020		161,000
2021		166,000
2022		158,000
2023		151,000
2024		110,000
Thereafter		9,000
Lease payments		183,000	237,000
Reduction in space (as a percent)	45.00%
Reduction in cost (as a percent)	45.00%
Mexican office
Leases and Purchase Commitments
Lease payments		50,000	45,000
Argentina office
Leases and Purchase Commitments
Lease payments		$ 8,000	$ 10,000