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INVENTORIES (Details Narrative) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Inventory Disclosure [Abstract]
Impairment charges for slow moving inventory	$ 0	$ 0

X

- Definition

The amount of impairment charges for slow moving inventory.

+ References

No definition available.

+ Details

Name:	gure_ImpairmentChargesSlowMovingInventory
Namespace Prefix:	gure_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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