Note 7 - Fair Value of Financial Instruments - Disclosure of Mortgage Held for Sale (Details) $ in Thousands	Sep. 30, 2016 USD ($)
Reported Value Measurement [Member]
Carrying Amount	$ 26,865
Aggregate Unpaid Principal Balance	25,726
Excess Carrying Amount Over Aggregate Unpaid Principle Balance	$ 1,139

The amount of mortgage loans held for sale in excess of the unpaid principal balance.

No definition available.

Name:	frbk_MortgageLoansHeldForSaleUnpaidPrincipalBalanceExcessCarryingAmount
Namespace Prefix:	frbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant