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Loans Payable - Additional Information (Details)																			12 Months Ended
Loans Payable - Additional Information (Details)	Oct. 28, 2022 USD ($)	Aug. 22, 2022 USD ($) property	Jul. 06, 2022 USD ($) loan	Jun. 17, 2022 USD ($) loan	Feb. 17, 2022 USD ($)	Jan. 11, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 22, 2021 USD ($)	Aug. 31, 2021 USD ($)	Aug. 13, 2021 USD ($) d $ / shares shares	May 28, 2021 USD ($)	May 05, 2021 USD ($)	Mar. 25, 2021 USD ($)	Mar. 12, 2021 USD ($)	Feb. 02, 2021 USD ($)	Jan. 21, 2021 USD ($)	Dec. 22, 2020 $ / shares shares	Jan. 01, 2019	Dec. 31, 2022 USD ($) property $ / shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 21, 2022 USD ($)	Dec. 09, 2022 USD ($)	Oct. 12, 2021 USD ($)	Jul. 22, 2021 USD ($)	Mar. 11, 2021 tranche shares
Debt Instrument [Line Items]
Loans payable, net																			$ 466,029,000	$ 333,283,000
Payments of loan prepayment penalties																			$ 2,614,000	$ 687,000
Series D Preferred Stock
Debt Instrument [Line Items]
Preferred stock cumulative dividend rate per annum																		10.75%
Minimum \| Series D Preferred Stock
Debt Instrument [Line Items]
Preferred stock cumulative dividend rate per annum														8.75%					8.75%
JANAF Bravo
Debt Instrument [Line Items]
Common stock shares under warrants issued (in shares) \| shares																	496,415
Exercise price of warrants (in dollars per share) \| $ / shares																	$ 3.12
Anniversary period																	36 months
Wilmington Financing Agreement
Debt Instrument [Line Items]
Common stock shares under warrants issued (in shares) \| shares																									1,061,719
Number of tranches \| tranche																									3
First National Bank
Debt Instrument [Line Items]
Debt interest rate								4.25%
Debt periodic payment								$ 25,000
Maximum line of credit borrowing capacity								$ 875,000
Line of Credit \| JANAF Bravo
Debt Instrument [Line Items]
Debt periodic payment														$ 25,000,000
Line of Credit \| Wilmington Financing Agreement
Debt Instrument [Line Items]
Debt interest rate														8.00%
Loans payable, net														$ 35,000,000
Premium, percentage of principal payment														5.00%
Unamortized premium														$ 1,750,000
7.00% Subordinated Convertible Notes due 2031
Debt Instrument [Line Items]
Conversion price (in dollars per share) \| $ / shares																			$ 6.25	$ 6.25
7.00% Subordinated Convertible Notes due 2031 \| Convertible Debt
Debt Instrument [Line Items]
Debt interest rate																								7.00%
Debt issued										$ 30,000,000														$ 30,000,000
Common stock shares under warrants issued (in dollars per share) \| $ / shares										$ 25.00
Threshold consecutive trading days \| d										15
Interest multiplier										0.55
Conversion price (in dollars per share) \| $ / shares										$ 6.25
Number of shares required to be redeemed in aggregate (in shares) \| shares										100,000
Discount on conversion, percent										55.00%
Conversion price discount, percent										45.00%
Redemption price percentage										100.00%
Common stock shares under warrants issued (in shares) \| shares										0.125
LIBOR \| First National Bank
Debt Instrument [Line Items]
Debt spread over variable basis percentage								3.50%
Rivergate
Debt Instrument [Line Items]
Term of credit facility							20 years												5 years
Debt spread over variable basis percentage							2.70%
Debt interest rate							4.25%												4.25%
Debt periodic payment							$ 100,000				$ 60,000								$ 100,222
Loans payable, net							$ 18,500,000												$ 18,003,000	$ 18,430,000
Floor rate							4.25%
Monthly principal payment									$ 3,540,000
Rivergate \| Minimum
Debt Instrument [Line Items]
Debt interest rate																			4.25%
Rivergate \| US Treasury (UST) Interest Rate
Debt Instrument [Line Items]
Debt spread over variable basis percentage																			2.70%
Rivergate \| Prime Rate
Debt Instrument [Line Items]
Debt spread over variable basis percentage											0.25%
Floor rate											3.00%
Backstop Parties \| 7.00% Subordinated Convertible Notes due 2031 \| Convertible Debt
Debt Instrument [Line Items]
Debt issued										$ 2,190,000													$ 3,000,000
Debt issuance aggregated costs																							$ 7,100,000
Lumber River Plaza
Debt Instrument [Line Items]
Debt interest rate								4.25%
Debt periodic payment								$ 11,000
Loans payable, net								$ 1,310,000
Lumber River Plaza \| LIBOR
Debt Instrument [Line Items]
Debt spread over variable basis percentage								3.50%
Tuckernuck
Debt Instrument [Line Items]
Debt interest rate															5.00%
Debt periodic payment															$ 32,000
Loans payable, net															$ 5,150,000
Columbia Fire Station
Debt Instrument [Line Items]
Debt interest rate																14.00%
Debt periodic payment																$ 500,000
Berkley/Sangaree/Tri-County
Debt Instrument [Line Items]
Debt interest rate																			4.78%
Debt periodic payment													$ 3,220,000						$ 32,329
Loans payable, net																			$ 6,086,000	6,176,000
Payments of loan prepayment penalties													$ 687,000
JANAF Bravo
Debt Instrument [Line Items]
Debt interest rate												5.00%							5.00%
Debt periodic payment												$ 35,000							$ 35,076
Loans payable, net												$ 6,000,000							$ 0	5,936,000
Walnut Hill Plaza
Debt Instrument [Line Items]
Debt interest rate																			5.50%
Debt periodic payment																			$ 26,850
Loans payable, net																			$ 0	3,145,000
Repayments of debt					$ 1,340,000	$ 1,790,000
Guggenheim Loan Agreement
Debt Instrument [Line Items]
Debt interest rate				4.25%															4.25%
Number of collateral real estate properties \| property																			22
Debt issued				$ 75,000,000
Loans payable, net																			$ 75,000,000	0
Payments of loan prepayment penalties				$ 1,460,000
Debt instrument, amortization term				30 years
Number loans refinanced \| loan				11
JANAF Loan Agreement
Debt Instrument [Line Items]
Debt interest rate			5.31%																5.31%
Debt issued			$ 60,000,000
Loans payable, net																			$ 60,000,000	0
Payments of loan prepayment penalties			$ 1,160,000
Number loans refinanced \| loan			3
KeyBank-Cedar Agreement
Debt Instrument [Line Items]
Number of collateral real estate properties \| property		19
Debt issued		$ 130,000,000
KeyBank-Cedar Agreement \| Secured Debt
Debt Instrument [Line Items]
Debt instrument, additional margin		4.00%
KeyBank-Cedar Agreement \| Commencing in February 2023
Debt Instrument [Line Items]
Debt instrument, additional margin		2.50%
KeyBank-Cedar Agreement \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt interest rate		0.10%
Guggenheim-Cedar Loan Agreement
Debt Instrument [Line Items]
Debt interest rate	5.25%																		5.25%
Number of collateral real estate properties \| property																			10
Debt issued	$ 110,000,000
Loans payable, net																			$ 110,000,000	0
Debt instrument, amortization term	30 years
Butler Square
Debt Instrument [Line Items]
Debt interest rate																			3.90%
Debt issued																						$ 5,640,000
Loans payable, net																			$ 0	$ 5,640,000
Coliseum Marketplace Loan Agreement
Debt Instrument [Line Items]
Debt interest rate																					6.35%
Debt issued																					$ 25,000,000