Indebtedness - Schedule of Mortgage Loan Acquisitions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 206,270,000	$ 290,156,000
Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	289,745,000	269,885,000
251 Armour Yards | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		3,522,000
Interest Rate	4.50%
Wakefield Crossing [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		7,891,000
Interest Rate	3.66%
Morrocroft Centre [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		70,000,000
Interest Rate	3.40%
Horizon At Wiregrass | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		52,000,000
Interest Rate	2.90%
Parkside At The Beach [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		45,037,000
Interest Rate	2.95%
The Blake [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		44,435,000
Interest Rate	2.82%
The Menlo [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate		$ 47,000,000
Interest Rate	2.68%
Midway Market [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 10,150,000
ellison | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	47,991,000
alleia | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	35,700,000
The Anson [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	56,440,000
kingson | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	53,900,000
Solis Chestnut Farm [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	51,800,000
Citi Lakes [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	10,420,000
Aldridge at Town Village [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	3,670,000
retreat at greystone [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	7,274,000
woodstock retail [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	5,300,000
fairview [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 7,100,000