Other Long- Term Assets (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2019	Jun. 30, 2019	Jun. 01, 2019
Change in Accounting Principle
Operating lease liability statement of financial position (Extensible list)	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
LPC Program [Member]
Change in Accounting Principle
Unamortized deferred cost	$ 353,000
Office Leases
Change in Accounting Principle
Right of use assets	400,000	$ 500,000
Lease liability	300,000	300,000
Mining Equipment Lease Property
Change in Accounting Principle
Right of use assets	400,000	500,000
Lease liability	$ 200,000	$ 300,000
Rodeo Property
Change in Accounting Principle
Term of operating lease		27 months
Right of use assets		$ 420,000
Lease liability		$ 420,000
Future lease payments discount rate		7.00%
COLORADO
Change in Accounting Principle
Term of operating lease						5 years 8 months
Right of use assets					$ 465,000
Lease liability					$ 450,000
Future lease payments discount rate					9.50%
Mexico and Argentina
Change in Accounting Principle
Right of use assets			$ 45,000
Lease liability			$ 45,000
Mexico
Change in Accounting Principle
Term of operating lease				4 years
Right of use assets				$ 174,000
Lease liability				$ 174,000
Argentina
Change in Accounting Principle
Term of operating lease			2 years
Right of use assets			$ 18,000
Lease liability			$ 18,000