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DEPOSITS (Details Narrative) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Time Deposits 250,000 or More	$ 45,100	$ 71,400

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Name:	grrb_TimeDeposits250000rMore
Namespace Prefix:	grrb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant