Loans - Secured Loans by Lien Position in the Collateral (Details)		1 Months Ended	12 Months Ended
		Jun. 30, 2020 MortgageLoan	Dec. 31, 2021 USD ($) MortgageLoan	Dec. 31, 2020 USD ($) MortgageLoan	Dec. 31, 2019 USD ($)
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Secured loans, principal			$ 55,099,000	$ 74,080,000	$ 86,203,000
Liens due other lenders at loan closing (in Dollars)			14,988,000	15,759,000
Total debt (in Dollars)			70,087,000	89,839,000
Appraised property value at loan closing (in Dollars)			$ 117,570,000	$ 180,041,000
Percent of total debt to appraised values (LTV) at loan closing	[1]		62.30%	53.80%
Loans - percent			100.00%	100.00%
Number of secured loans | MortgageLoan		2	31	33
First Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Secured loans, principal			$ 45,992,000	$ 64,286,000
Loans - percent			83.00%	87.00%
Number of secured loans | MortgageLoan			25	24
Second Trust Deeds [Member]
Loans Details - Secured Loans by Lien Position in the Collateral [Line Items]
Secured loans, principal			$ 9,107,000	$ 9,794,000
Loans - percent			17.00%	13.00%
Number of secured loans | MortgageLoan			6	9

[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.