Contract agreement term.

No definition available.

Name:	USAU_ContractAgreementTerm
Namespace Prefix:	USAU_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedPerTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueIssuedForServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_TitleOfIndividualAxis=USAU_EmployeeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=USAU_ATMAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=USAU_OneEquityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=USAU_TwoEquityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=USAU_EquityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details Narrative) - USD ($)				1 Months Ended		9 Months Ended
Subsequent Events (Details Narrative) - USD ($)	Feb. 19, 2019	Feb. 04, 2019	Apr. 16, 2018	Mar. 18, 2019	Jul. 31, 2017	Jan. 31, 2019	Dec. 27, 2018
Subsequent Event [Line Items]
Number of common stock issued for services, value						$ 853,232
Share issued price per shares						$ 1.36	$ 0.92
Number of common stock sold					179,211
Sale of stock price per shares					$ 2.79
Employee [Member]
Subsequent Event [Line Items]
Number of common stock issued for services			50,000
ATM Agreement [Member]
Subsequent Event [Line Items]
Share issued price per shares						$ 1.02
Subsequent Event [Member] \| Employee [Member]
Subsequent Event [Line Items]
Number of common stock issued for services		12,626
Number of common stock issued for services, value		$ 12,500
Share issued price per shares		$ 0.99
Subsequent Event [Member] \| One Equity Agreement [Member]
Subsequent Event [Line Items]
Contract agreement term	6 months
Subsequent Event [Member] \| Two Equity Agreement [Member]
Subsequent Event [Line Items]
Contract agreement term	12 months
Subsequent Event [Member] \| Equity Agreement [Member]
Subsequent Event [Line Items]
Number of common stock issued for services	155,951
Number of common stock issued for services, value	$ 160,630
Share issued price per shares	$ 1.03
Subsequent Event [Member] \| ATM Agreement [Member]
Subsequent Event [Line Items]
Number of common stock sold				54,995
Numbe of common stock sold, value				$ 45,932
Sale of stock price per shares				$ 0.87