Organization and Summary of Significant Accounting Policies - Loans (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward]
Retention percentage of unguaranteed portion of loan participating interest.	5.00%
Credit exposure threshold for impairment evaluation (less than)	$ 100,000
SBA Loan
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward]
Percentage of principal balance required to be retained	10.00%
USDA loan
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward]
Percentage of principal balance required to be retained	5.00%