Nature of Operations and Basis of Presentation (Details)	6 Months Ended
Jun. 30, 2021
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Percentage of ownership in project	100.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration