SCHEDULE IV - MORTGAGE LOANS ON REAL ESTATE (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying amount of mortgages	$ 73,543	$ 83,135	$ 68,079
Loans receivable	73,260	83,136
SBA 7(a) loans receivable, Paycheck Protection Program
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans receivable	$ 5,050	$ 14,484
SBA 7(a) Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	199
Carrying amount of mortgages	$ 73,543
Principal amount of loans subject to delinquent principal or "interest"	85
Loans not secured by real estate	359
Federal income tax cost basis of mortgage loans (unaudited)	66,400
SBA 7(a) Loans | Government guaranteed portions
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying amount of mortgages	1,199
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | SBA 7(a) loans receivable, subject to secured borrowings
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying amount of mortgages	6,671
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | SBA 7(a) loans receivable, Paycheck Protection Program
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying amount of mortgages	4,903
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | General reserves
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
General reserves	(858)
Principal amount of loans subject to delinquent principal or "interest"	0
Reserves	$ 858
SBA 7(a) Loans | Texas
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	21
Carrying amount of mortgages	$ 7,861
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Texas | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 10
Interest Rate	4.75%
SBA 7(a) Loans | Texas | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 980
Interest Rate	6.00%
SBA 7(a) Loans | Ohio
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	23
Carrying amount of mortgages	$ 7,672
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Ohio | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 70
Interest Rate	4.75%
SBA 7(a) Loans | Ohio | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 890
Interest Rate	6.00%
SBA 7(a) Loans | Indiana
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	16
Carrying amount of mortgages	$ 6,873
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Indiana | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 100
Interest Rate	4.75%
SBA 7(a) Loans | Indiana | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 970
Interest Rate	6.00%
SBA 7(a) Loans | Michigan
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	20
Carrying amount of mortgages	$ 5,859
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Michigan | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 10
Interest Rate	4.75%
SBA 7(a) Loans | Michigan | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 970
Interest Rate	6.00%
SBA 7(a) Loans | Florida
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	12
Carrying amount of mortgages	$ 5,173
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Florida | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 90
Interest Rate	5.00%
SBA 7(a) Loans | Florida | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 1,070
Interest Rate	6.00%
SBA 7(a) Loans | Illinois
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	11
Carrying amount of mortgages	$ 2,278
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Illinois | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 50
Interest Rate	5.00%
SBA 7(a) Loans | Illinois | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 530
Interest Rate	6.00%
SBA 7(a) Loans | West Virginia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	6
Carrying amount of mortgages	$ 2,107
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | West Virginia | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 20
Interest Rate	4.75%
SBA 7(a) Loans | West Virginia | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 870
Interest Rate	6.00%
SBA 7(a) Loans | Pennsylvania
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	4
Carrying amount of mortgages	$ 2,077
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Pennsylvania | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 310
Interest Rate	5.00%
SBA 7(a) Loans | Pennsylvania | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 690
Interest Rate	6.00%
SBA 7(a) Loans | Pennsylvania | Mortgage Loans - $284,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 85
Interest Rate	6.00%
General reserves	$ (85)
Reserves	$ 85
SBA 7(a) Loans | Louisiana
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	6
Carrying amount of mortgages	$ 1,801
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Louisiana | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 90
Interest Rate	5.00%
SBA 7(a) Loans | Louisiana | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 590
Interest Rate	6.00%
SBA 7(a) Loans | New Mexico
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	5
Carrying amount of mortgages	$ 1,720
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | New Mexico | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 100
Interest Rate	4.75%
SBA 7(a) Loans | New Mexico | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 770
Interest Rate	6.00%
SBA 7(a) Loans | Virginia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	5
Carrying amount of mortgages	$ 1,640
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Virginia | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 110
Interest Rate	5.00%
SBA 7(a) Loans | Virginia | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 650
Interest Rate	5.75%
SBA 7(a) Loans | Colorado
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	4
Carrying amount of mortgages	$ 1,515
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Colorado | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 320
Interest Rate	4.75%
SBA 7(a) Loans | Colorado | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 520
Interest Rate	5.50%
SBA 7(a) Loans | Kentucky
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	6
Carrying amount of mortgages	$ 1,498
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Kentucky | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 130
Interest Rate	5.00%
SBA 7(a) Loans | Kentucky | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 420
Interest Rate	6.00%
SBA 7(a) Loans | Alabama
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	7
Carrying amount of mortgages	$ 1,473
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | Alabama | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 30
Interest Rate	5.00%
SBA 7(a) Loans | Alabama | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 480
Interest Rate	5.75%
SBA 7(a) Loans | North Carolina
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	7
Carrying amount of mortgages	$ 1,358
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | North Carolina | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 60
Interest Rate	5.25%
SBA 7(a) Loans | North Carolina | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 350
Interest Rate	6.00%
SBA 7(a) Loans | South Carolina
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	4
Carrying amount of mortgages	$ 1,308
Principal amount of loans subject to delinquent principal or "interest"	0
SBA 7(a) Loans | South Carolina | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 270
Interest Rate	5.00%
SBA 7(a) Loans | South Carolina | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 390
Interest Rate	6.00%
SBA 7(a) Loans | Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans | loan	42
Carrying amount of mortgages	$ 9,415
Principal amount of loans subject to delinquent principal or "interest"	85
SBA 7(a) Loans | Other | Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 1
Interest Rate	4.75%
SBA 7(a) Loans | Other | Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 510
Interest Rate	6.00%