Mineral Properties and Interests (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Initial lease fee
Kiewit and all other sites	$ 3,700,000	$ 600,000
Less accumulated amortization	(36,948)	(36,948)
Total	3,663,052	563,052
Asset retirement costs
Kiewit Site	452,193	452,193
Kiewit Exploration	11,126	11,126
Cactus Mill		26,234
Total	463,319	489,553
Less accumulated amortization	(171,052)	(173,604)
Mineral properties after accumulated depletion	292,267	315,949
Total	$ 3,955,319	$ 879,001

Carrying amount at the balance sheet date of mineral properties, gross of adjustments.

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