RELATIONSHIP WITH OUR PARTNER BANK (Details)	Jan. 04, 2021 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) location	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Payable to partner bank			$ 9,000,000	$ 5,105,000
Number of office space locations leased under operating leases | location			2
Affiliated Entity | Partner Bank
Related Party Transaction [Line Items]
Payable to partner bank			$ 9,000,000.0
Line of credit, maximum borrowing capacity			10,000,000.0
Line of credit, amount outstanding			$ 5,400,000
Number of office space locations leased under operating leases | location			1
Affiliated Entity | Partner Bank | Subsequent Event
Related Party Transaction [Line Items]
Line of credit, amount outstanding		$ 4,000,000.0
Deposit Servicing Agreement | Affiliated Entity | Partner Bank
Related Party Transaction [Line Items]
Automatic renewal terms	3 years
Period of written notice of non-renewal required prior to expiration of the term	180 days
Transition Services Agreement | Affiliated Entity | Partner Bank
Related Party Transaction [Line Items]
Period each party agreed to provide certain transition services to the other party (up to)	12 months
Monthly service fee	$ 12,500
Period of advance written notice required to terminate agreement without penalty	30 days