Loans - Secured Loans Distributed Within California (Details) - USD ($)		Mar. 31, 2018	Dec. 31, 2017
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 57,865,391	$ 54,768,689
Loans - percent		100.00%	100.00%
Alameda [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]	$ 8,993,618	$ 9,869,036
Loans - percent	[1]	15.50%	18.00%
San Francisco [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]	$ 7,755,285	$ 8,338,720
Loans - percent	[1]	13.40%	15.10%
San Mateo [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]	$ 8,554,723	$ 7,800,549
Loans - percent	[1]	14.80%	14.20%
Santa Clara [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]	$ 7,111,703	$ 5,461,084
Loans - percent	[1]	12.30%	10.00%
Solano [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]		$ 109,443
Loans - percent	[1]		0.20%
Contra Costa [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]	$ 1,064,345	$ 1,511,195
Loans - percent	[1]	1.80%	2.80%
Sonoma [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]	$ 1,285,000
Loans - percent	[1]	2.20%
San Francisco Bay Area [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)	[1]	$ 34,764,674	$ 33,090,027
Loans - percent	[1]	60.00%	60.30%
Placer [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 641,571	$ 642,913
Loans - percent		1.10%	1.20%
San Joaquin [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 156,696	$ 157,039
Loans - percent		0.30%	0.30%
Yolo [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 169,915	$ 174,758
Loans - percent		0.30%	0.30%
Sacramento [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 850,000	$ 850,000
Loans - percent		1.50%	1.60%
Other Northern California [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 1,818,182	$ 1,824,710
Loans - percent		3.20%	3.40%
Northern California [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 36,582,856	$ 34,914,737
Loans - percent		63.20%	63.70%
Los Angeles [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 10,871,240	$ 12,357,456
Loans - percent		18.80%	22.60%
San Diego [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 2,004,547	$ 2,192,746
Loans - percent		3.50%	4.00%
Orange [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 4,594,372	$ 1,487,747
Loans - percent		7.90%	2.70%
Ventura [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 349,291	$ 350,000
Loans - percent		0.60%	0.60%
Los Angeles & Coastal [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 18,814,224	$ 17,384,717
Loans - percent		32.50%	31.70%
Santa Barbara [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 994,774	$ 996,768
Loans - percent		1.70%	1.80%
Riverside [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 358,311	$ 359,235
Loans - percent		0.60%	0.70%
San Bernardino [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 2,110,000	$ 2,110,000
Loans - percent		3.70%	3.90%
Other Southern California [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 2,468,311	$ 2,469,235
Loans - percent		4.30%	4.60%
Southern California [Member]
Loans (Details) - Secured Loans Distributed Within California [Line Items]
Loans - principal (in Dollars)		$ 21,282,535	$ 19,853,952
Loans - percent		36.80%	36.30%

[1] Includes Silicon Valley