Loans - Secured Loans by Lien Position in the Collateral (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2022 USD ($) Loan	Dec. 31, 2022 USD ($) MortgageLoan	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2021 USD ($) MortgageLoan	Dec. 31, 2020 USD ($)
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Number of secured loans		21	21	31	31
Secured loans, principal		$ 60,088	$ 60,088	$ 55,099	$ 55,099	$ 74,080
Loans - percent		100.00%	100.00%	100.00%	100.00%
Liens due other lenders at loan closing (in Dollars)		$ 8,956	$ 8,956	$ 14,988	$ 14,988
Total debt (in Dollars)		69,044	69,044	70,087	70,087
Appraised property value at loan closing (in Dollars)		$ 138,924	$ 138,924	$ 117,570	$ 117,570
Percent of total debt to appraised values (LTV) at loan closing	[1]	55.40%	55.40%	62.30%	62.30%
First Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Number of secured loans | MortgageLoan			18		25
Secured loans, principal		$ 55,803	$ 55,803	$ 45,992	$ 45,992
Loans - percent		93.00%	93.00%	83.00%	83.00%
Second Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Number of secured loans | MortgageLoan			3		6
Secured loans, principal		$ 4,285	$ 4,285	$ 9,107	$ 9,107
Loans - percent		7.00%	7.00%	17.00%	17.00%

[1] Based on appraised values and liens due other lenders at loan closing. The weighted-average loan-to-value (LTV) computation above does not take into account subsequent increases or decreases in property values following the loan closing, nor does it include decreases or increases of the amount of senior liens to other lenders.