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5. FINANCE LEASE RIGHT-OF-USE ASSETS (Details Narrative) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Leases [Abstract] |  |
Depreciation and amortization expense | $ 1,428 | $ 1,327

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Namespace Prefix: | GURE_
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Balance Type: | debit
Period Type: | duration

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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration