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Mineral Properties, Guadalupe (Details)			1 Months Ended				9 Months Ended
	Jan. 23, 2019 USD ($)	Oct. 24, 2018 USD ($)	Oct. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Oct. 31, 2018 USD ($)	Oct. 31, 2017 USD ($) item	Sep. 30, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Proceeds from option/sale agreements, net							$ 1,667,000
Deferred option gain							$ 1,392,000
Guadalupe De Los Reyes, Mexico | Option Agreement Two
Property, Plant and Equipment [Line Items]
Interest has right to earn (as a percent)						100.00%
Sale price of gold/silver project						$ 6,000,000
Number of successive payments | item						2
Back in Right (as a percent)						49.00%
Ownership interest if terms of option agreement not fulfilled (as a percent)						0.00%
Ownership to be transferred (as a percent)						100.00%
Proceeds from option/sale agreements, net	$ 100,000	$ 50,000		$ 1,500,000	$ 150,000	$ 1,500,000
Interest income				67,000
Deferred option gain				1,392,000
Value of carrying value for option payment proceeds to be recognized as contract liability				$ 0
Interest rate (as a percent)					1.50%
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Subsequent Event [Member]
Property, Plant and Equipment [Line Items]
Proceeds from option/sale agreements, net			$ 1,500,000
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Property, Plant and Equipment [Line Items]
Future payment					$ 1,500,000
Timing of future payment					6 months
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Open Pit Mining
Property, Plant and Equipment [Line Items]
Aggregate royalty payments to be received						2,000,000
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Execution of Option Agreement
Property, Plant and Equipment [Line Items]
Sale price of gold/silver project						1,500,000
Guadalupe De Los Reyes, Mexico | Option Agreement Two | One Year Anniversary
Property, Plant and Equipment [Line Items]
Sale price of gold/silver project						1,500,000
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Two Year Anniversary
Property, Plant and Equipment [Line Items]
Sale price of gold/silver project						1,500,000
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Before Four Year Anniversary
Property, Plant and Equipment [Line Items]
Sale price of gold/silver project						$ 1,500,000
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Minimum | Open Pit Mining
Property, Plant and Equipment [Line Items]
Net smelter return royalty (as a percent)						1.00%
Gold price (USD per ounce)						$ 1,600
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Minimum | Underground Mining
Property, Plant and Equipment [Line Items]
Net smelter return royalty (as a percent)						1.00%
Gold price (USD per ounce)						$ 1,600
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Maximum | Open Pit Mining
Property, Plant and Equipment [Line Items]
Net smelter return royalty (as a percent)						2.00%
Gold price (USD per ounce)						$ 1,400
Guadalupe De Los Reyes, Mexico | Option Agreement Two | Maximum | Underground Mining
Property, Plant and Equipment [Line Items]
Net smelter return royalty (as a percent)						2.00%
Gold price (USD per ounce)						$ 1,400
Guadalupe De Los Reyes, Mexico | Minera Gold Stake S A de C V | Option Agreement Two
Property, Plant and Equipment [Line Items]
Ownership interest (as a percent)						100.00%

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