Nature of Business and Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) segment	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Significant Accounting Policies [Line Items]
Cash, net of demand deposits	$ 0		$ 0
Number of loan portfolio segments | segment	1
Accounting Standards Update 2016-02 [Member]
Significant Accounting Policies [Line Items]
Right-of-use assets		$ 680,000
Lease liabilities		$ 680,000
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment	3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment	7 years