SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION - Initial Cost and Subsequent Costs Capitalized (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cost:
Encumbrances	$ 53,884,373
Land	160,101,806
Building & Improvements	230,666,905
Improvements	2,073,188
Gross Amount Carried at Close
Land	160,101,806
Buildings	232,740,093
Total	392,841,899	$ 463,703,673	$ 358,130,350	$ 274,334,139
Accumulated Depreciation	22,551,716	$ 28,732,504	$ 21,878,465	$ 14,391,567
24 Hour Fitness USA, Inc | Falls Church, VA
Cost:
Land	7,308,225
Building & Improvements	11,559,506
Gross Amount Carried at Close
Land	7,308,225
Buildings	11,559,506
Total	18,867,731
Accumulated Depreciation	$ 201,852
Life	30 years
7-Eleven | Dallas, TX
Cost:
Land	$ 974,862
Building & Improvements	1,550,744
Gross Amount Carried at Close
Land	974,862
Buildings	1,550,744
Total	2,525,606
Accumulated Depreciation	$ 148,613
Life	40 years
Aspen Development | Aspen, CO
Cost:
Land	$ 11,973,930
Building & Improvements	14,968,210
Gross Amount Carried at Close
Land	11,973,930
Buildings	14,968,210
Total	26,942,140
Accumulated Depreciation	$ 583,973
Life	52 years
Bank of America | Monterey, CA
Cost:
Land	$ 4,458,840
Gross Amount Carried at Close
Land	4,458,840
Total	4,458,840
WAWA (formerly Barnes & Noble) | Daytona Beach, FL
Cost:
Land	1,798,600
Building & Improvements	3,803,000
Gross Amount Carried at Close
Land	1,798,600
Buildings	3,803,000
Total	5,601,600
Accumulated Depreciation	$ 1,806,425
Life	40 years
Big Lots | Germantown, MD
Cost:
Encumbrances	$ 3,300,000
Land	1,781,918
Building & Improvements	2,951,231
Improvements	6,750
Gross Amount Carried at Close
Land	1,781,918
Buildings	2,957,981
Total	4,739,899
Accumulated Depreciation	$ 468,403
Life	40 years
Big Lots | Phoenix, AZ
Cost:
Encumbrances	$ 3,400,000
Land	1,715,717
Building & Improvements	3,050,164
Gross Amount Carried at Close
Land	1,715,717
Buildings	3,050,164
Total	4,765,881
Accumulated Depreciation	$ 527,424
Life	40 years
Burlington Stores, Inc | Richland Hills, TX
Cost:
Land	$ 3,915,679
Building & Improvements	7,028,945
Gross Amount Carried at Close
Land	3,915,679
Buildings	7,028,945
Total	10,944,624
Accumulated Depreciation	$ 57,361
Life	30 years
Carrabba's Italian Grill | Austin, TX
Cost:
Land	$ 1,160,925
Building & Improvements	1,305,117
Gross Amount Carried at Close
Land	1,160,925
Buildings	1,305,117
Total	2,466,042
Accumulated Depreciation	$ 220,066
Life	25 years
Chuy'S Restaurant & Bar | Jacksonville, FL
Cost:
Land	$ 5,504,039
Gross Amount Carried at Close
Land	5,504,039
Total	5,504,039
Crabby's Restaurant (formerly Cocina 214) | Daytona Beach, FL
Cost:
Land	5,835,939
Building & Improvements	4,249,199
Improvements	8,662
Gross Amount Carried at Close
Land	5,835,939
Buildings	4,257,861
Total	10,093,800
Accumulated Depreciation	$ 434,517
Life	40 years
Fidelity Investment (affiliate of) | Albuquerque, NM
Cost:
Land	$ 5,751,131
Building & Improvements	29,537,069
Gross Amount Carried at Close
Land	5,751,131
Buildings	29,537,069
Total	35,288,200
Accumulated Depreciation	$ 1,405,493
Life	45 years
Firebirds Woodfired Grill | Jacksonville, FL
Cost:
Land	$ 4,202,924
Gross Amount Carried at Close
Land	4,202,924
Total	4,202,924
General Dynamics Corporation | Reston, VA
Cost:
Land	7,530,432
Building & Improvements	9,068,274
Gross Amount Carried at Close
Land	7,530,432
Buildings	9,068,274
Total	16,598,706
Accumulated Depreciation	$ 243,267
Life	35 years
J P Morgan Chase Bank | Jacksonville, FL
Cost:
Land	$ 4,516,486
Gross Amount Carried at Close
Land	4,516,486
Total	4,516,486
CVS Pharmacy | Dallas, TX
Cost:
Land	7,535,013
Gross Amount Carried at Close
Land	7,535,013
Total	7,535,013
Harris Teeter | Charlotte, NC
Cost:
Encumbrances	6,600,000
Land	5,601,837
Building & Improvements	3,409,338
Gross Amount Carried at Close
Land	5,601,837
Buildings	3,409,338
Total	9,011,175
Accumulated Depreciation	$ 1,001,493
Life	40 years
LandShark Bar and Grill | Daytona Beach, FL
Cost:
Land	$ 5,835,939
Building & Improvements	4,578,168
Improvements	8,662
Gross Amount Carried at Close
Land	5,835,939
Buildings	4,586,830
Total	10,422,769
Accumulated Depreciation	$ 422,800
Life	40 years
Lowe's Corporation | Katy, TX
Cost:
Encumbrances	$ 8,500,000
Land	9,412,181
Building & Improvements	3,480,650
Gross Amount Carried at Close
Land	9,412,181
Buildings	3,480,650
Total	12,892,831
Accumulated Depreciation	$ 758,345
Life	30 years
Macaroni Grill | Arlington, TX
Cost:
Land	$ 956,685
Building & Improvements	1,069,700
Gross Amount Carried at Close
Land	956,685
Buildings	1,069,700
Total	2,026,385
Accumulated Depreciation	$ 54,714
Life	30 years
Maple Ave Land | Dallas, TX
Cost:
Land	$ 359,116
Gross Amount Carried at Close
Land	359,116
Total	359,116
Outback Steakhouse | Austin, TX
Cost:
Land	1,376,793
Building & Improvements	1,585,791
Gross Amount Carried at Close
Land	1,376,793
Buildings	1,585,791
Total	2,962,584
Accumulated Depreciation	$ 228,176
Life	30 years
Party City Corporation | Oceanside, NY
Cost:
Land	$ 2,964,507
Building & Improvements	3,288,786
Gross Amount Carried at Close
Land	2,964,507
Buildings	3,288,786
Total	6,253,293
Accumulated Depreciation	$ 26,376
Life	35 years
Rite Aid Corp. | Renton, WA
Cost:
Encumbrances	$ 4,700,000
Land	2,036,235
Building & Improvements	4,148,415
Gross Amount Carried at Close
Land	2,036,235
Buildings	4,148,415
Total	6,184,650
Accumulated Depreciation	$ 665,475
Life	40 years
Riverside Avenue | Jacksonville, FL
Cost:
Land	$ 6,019,815
Building & Improvements	14,239,515
Improvements	767,532
Gross Amount Carried at Close
Land	6,019,815
Buildings	15,007,047
Total	21,026,862
Accumulated Depreciation	$ 2,866,175
Life	43 years
Staples | Sarasota, FL
Cost:
Land	$ 2,728,083
Building & Improvements	1,145,137
Gross Amount Carried at Close
Land	2,728,083
Buildings	1,145,137
Total	3,873,220
Accumulated Depreciation	$ 167,313
Life	40 years
The Strand | Jacksonville, FL
Cost:
Land	$ 13,886,294
Building & Improvements	38,832,707
Gross Amount Carried at Close
Land	13,886,294
Buildings	38,832,707
Total	52,719,001
Accumulated Depreciation	$ 123,295
Life	48 years
Walgreens | Clermont, FL
Cost:
Encumbrances	$ 3,500,000
Land	3,021,665
Building & Improvements	1,269,449
Gross Amount Carried at Close
Land	3,021,665
Buildings	1,269,449
Total	4,291,114
Accumulated Depreciation	$ 494,556
Life	40 years
Wells Fargo | Raleigh, NC
Cost:
Encumbrances	$ 23,884,373
Land	8,680,056
Building & Improvements	59,166,753
Improvements	1,186,118
Gross Amount Carried at Close
Land	8,680,056
Buildings	60,352,871
Total	69,032,927
Accumulated Depreciation	$ 8,309,888
Life	45 years
Westcliff property
Cost:
Land	$ 10,500,000
Westcliff Shopping Center | Fort Worth, TX
Cost:
Land	10,520,822
Building & Improvements	4,196,359
Improvements	95,464
Gross Amount Carried at Close
Land	10,520,822
Buildings	4,291,823
Total	14,812,645
Accumulated Depreciation	$ 1,203,607
Life	10 years
Moe's Southwest Grill | Jacksonville, FL
Cost:
Land	$ 1,862,284
Gross Amount Carried at Close
Land	1,862,284
Total	1,862,284
PDQ | Jacksonville, FL
Cost:
Land	2,205,539
Gross Amount Carried at Close
Land	2,205,539
Total	2,205,539
Wawa | Jacksonville, FL
Cost:
Land	6,252,632
Gross Amount Carried at Close
Land	6,252,632
Total	6,252,632
World of Beer/Fuzzy's Taco Shop | Brandon, FL
Cost:
Land	416,663
Building & Improvements	1,184,678
Gross Amount Carried at Close
Land	416,663
Buildings	1,184,678
Total	1,601,341
Accumulated Depreciation	$ 132,109
Life	30 years