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8. RELATED PARTY TRANSACTIONS (Details Narrative) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Related Party Transactions [Abstract] |  |
Expense associated with agreement | $ 23,735 | $ 22,013

X
- References No definition available. + Details
Name: | GURE_ExpenseAssociatedWithAgreement
Namespace Prefix: | GURE_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration