Note 7 - Fair Value of Financial Instruments - Disclosure of Mortgage Held for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Aggregate Unpaid Principal Balance	$ 19,052	$ 23,428
Excess Carrying Amount Over Aggregate Unpaid Principle Balance	701	483
Reported Value Measurement [Member]
Carrying Amount	$ 19,753	$ 23,911

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