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Schedule III - Real Estate and Accumulated Depreciation Section 6 (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 $ 1,529,057,000      
Land 2,786,282,000      
Buildings, Fixtures and Improvements 10,186,554,000      
Costs Capitalized Subsequent to Acquisition (33,607,000)      
Gross Amount Carried at December 31, 2019 12,939,229,000 $ 13,592,440,000 $ 13,577,700,000 $ 13,539,921,000
Accumulated Depreciation (2,727,099,000) $ (2,622,879,000) $ (2,217,108,000) $ (1,766,006,000)
IHOP [Member] | Natchitoches, LA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 750,000      
Buildings, Fixtures and Improvements 89,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 839,000      
Accumulated Depreciation (30,000)      
IHOP [Member] | Fort Worth, TX 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 560,000      
Buildings, Fixtures and Improvements 1,879,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 2,440,000      
Accumulated Depreciation (625,000)      
IHOP [Member] | Greenville, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 610,000      
Buildings, Fixtures and Improvements 1,551,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,161,000      
Accumulated Depreciation (516,000)      
IHOP [Member] | Murfreesboro, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 600,000      
Buildings, Fixtures and Improvements 1,687,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,287,000      
Accumulated Depreciation (561,000)      
IHOP [Member] | Homewood, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 610,000      
Buildings, Fixtures and Improvements 1,762,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,372,000      
Accumulated Depreciation (585,000)      
Jack in the Box [Member] | Burley, ID [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 240,000      
Buildings, Fixtures and Improvements 1,430,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,670,000      
Accumulated Depreciation (470,000)      
Jack in the Box [Member] | Arlington, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 1,325,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,745,000      
Accumulated Depreciation (436,000)      
Jack in the Box [Member] | Arlington, TX 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 1,365,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,785,000      
Accumulated Depreciation (449,000)      
Jack in the Box [Member] | Farmers Branch, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 460,000      
Buildings, Fixtures and Improvements 1,640,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,100,000      
Accumulated Depreciation (539,000)      
Jack in the Box [Member] | Fort Worth, TX 4 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 490,000      
Buildings, Fixtures and Improvements 1,702,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,192,000      
Accumulated Depreciation (560,000)      
Jack in the Box [Member] | Grand Prairie, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 600,000      
Buildings, Fixtures and Improvements 1,856,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,456,000      
Accumulated Depreciation (610,000)      
Jack in the Box [Member] | Grapevine, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 470,000      
Buildings, Fixtures and Improvements 1,344,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,814,000      
Accumulated Depreciation (442,000)      
Jack in the Box [Member] | Houston, TX 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 460,000      
Buildings, Fixtures and Improvements 1,437,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,897,000      
Accumulated Depreciation (473,000)      
Jack in the Box [Member] | Houston, TX 4 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 390,000      
Buildings, Fixtures and Improvements 1,172,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,562,000      
Accumulated Depreciation (385,000)      
Jack in the Box [Member] | Houston, TX 5 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 330,000      
Buildings, Fixtures and Improvements 1,845,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,175,000      
Accumulated Depreciation (606,000)      
Jack in the Box [Member] | Houston, TX 6 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 410,000      
Buildings, Fixtures and Improvements 1,621,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,031,000      
Accumulated Depreciation (533,000)      
Jack in the Box [Member] | Houston, TX 7 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 450,000      
Buildings, Fixtures and Improvements 1,396,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,846,000      
Accumulated Depreciation (459,000)      
Jack in the Box [Member] | Mesquite, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 560,000      
Buildings, Fixtures and Improvements 1,652,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,212,000      
Accumulated Depreciation (543,000)      
Jack in the Box [Member] | Port Arthur, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 460,000      
Buildings, Fixtures and Improvements 1,405,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,865,000      
Accumulated Depreciation (462,000)      
Jack in the Box [Member] | San Antonio, TX 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 350,000      
Buildings, Fixtures and Improvements 1,249,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,599,000      
Accumulated Depreciation (410,000)      
Jack in the Box [Member] | Spring, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 450,000      
Buildings, Fixtures and Improvements 1,487,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,937,000      
Accumulated Depreciation (489,000)      
Jack in the Box [Member] | San Antonio, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 400,000      
Buildings, Fixtures and Improvements 1,244,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,644,000      
Accumulated Depreciation (409,000)      
Jack in the Box [Member] | Belleville, IL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 200,000      
Buildings, Fixtures and Improvements 966,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,166,000      
Accumulated Depreciation (318,000)      
Jack in the Box [Member] | San Antonio, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 470,000      
Buildings, Fixtures and Improvements 1,256,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,726,000      
Accumulated Depreciation (413,000)      
Jack in the Box [Member] | Texas City, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 454,000      
Buildings, Fixtures and Improvements 844,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,298,000      
Accumulated Depreciation (280,000)      
Jack in the Box [Member] | Florissant, MO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 502,000      
Buildings, Fixtures and Improvements 1,515,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,017,000      
Accumulated Depreciation (498,000)      
Jack in the Box [Member] | St. Louis, MO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 1,494,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,914,000      
Accumulated Depreciation (491,000)      
Kentucky Fried Chicken [Member] | Deming, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 220,000      
Buildings, Fixtures and Improvements 691,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 911,000      
Accumulated Depreciation (227,000)      
Kentucky Fried Chicken [Member] | Las Cruces, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 270,000      
Buildings, Fixtures and Improvements 498,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 768,000      
Accumulated Depreciation (164,000)      
Leeann Chin [Member] | Blaine, MN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 480,000      
Buildings, Fixtures and Improvements 528,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,008,000      
Accumulated Depreciation (174,000)      
Long John Silver's / A&W [Member] | Clovis, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 210,000      
Buildings, Fixtures and Improvements 705,000      
Costs Capitalized Subsequent to Acquisition (377,000)      
Gross Amount Carried at December 31, 2019 538,000      
Accumulated Depreciation (86,000)      
Long John Silver's / A&W [Member] | Austin, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 459,000      
Buildings, Fixtures and Improvements 477,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 936,000      
Accumulated Depreciation (158,000)      
Pizza Hut/WingStreet [Member] | Bozeman, MT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 150,000      
Buildings, Fixtures and Improvements 343,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 493,000      
Accumulated Depreciation (114,000)      
Pizza Hut/WingStreet [Member] | Glasgow, MT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 120,000      
Buildings, Fixtures and Improvements 217,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 337,000      
Accumulated Depreciation (72,000)      
Pizza Hut/WingStreet [Member] | Livingston, MT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 130,000      
Buildings, Fixtures and Improvements 245,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 375,000      
Accumulated Depreciation (81,000)      
Pizza Hut/WingStreet [Member] | Knoxville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 300,000      
Buildings, Fixtures and Improvements 546,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 846,000      
Accumulated Depreciation (181,000)      
Pizza Hut/WingStreet [Member] | Salisbury, MD [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 245,000      
Buildings, Fixtures and Improvements 734,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 979,000      
Accumulated Depreciation (233,000)      
Pizza Hut/WingStreet [Member] | Amarillo, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 339,000      
Buildings, Fixtures and Improvements 1,016,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,355,000      
Accumulated Depreciation (323,000)      
Pizza Hut/WingStreet [Member] | East Syracuse, NY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 137,000      
Buildings, Fixtures and Improvements 185,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 322,000      
Accumulated Depreciation (61,000)      
Pizza Hut/WingStreet [Member] | Defiance, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 114,000      
Buildings, Fixtures and Improvements 197,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 311,000      
Accumulated Depreciation (65,000)      
Pizza Hut/WingStreet [Member] | North Olmsted, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 122,000      
Buildings, Fixtures and Improvements 153,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 275,000      
Accumulated Depreciation (51,000)      
Pizza Hut/WingStreet [Member] | Strongsville, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 74,000      
Buildings, Fixtures and Improvements 108,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 182,000      
Accumulated Depreciation (36,000)      
Pizza Hut/WingStreet [Member] | Toledo, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 58,000      
Buildings, Fixtures and Improvements 173,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 231,000      
Accumulated Depreciation (57,000)      
Pizza Hut/WingStreet [Member] | Cedar City, UT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 52,000      
Buildings, Fixtures and Improvements 361,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 413,000      
Accumulated Depreciation (120,000)      
Pizza Hut/WingStreet [Member] | Columbia, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 881,000      
Buildings, Fixtures and Improvements 588,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,469,000      
Accumulated Depreciation (186,000)      
Popeyes [Member] | Houston, TX 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 190,000      
Buildings, Fixtures and Improvements 452,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 642,000      
Accumulated Depreciation (149,000)      
Popeyes [Member] | Houston, TX 4 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 295,000      
Buildings, Fixtures and Improvements 241,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 536,000      
Accumulated Depreciation (76,000)      
Popeyes [Member] | Houston, TX 5 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 111,000      
Buildings, Fixtures and Improvements 166,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 277,000      
Accumulated Depreciation (53,000)      
Popeyes [Member] | Houston, TX 6 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 278,000      
Buildings, Fixtures and Improvements 227,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 505,000      
Accumulated Depreciation (72,000)      
Popeyes [Member] | Port Arthur, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 408,000      
Buildings, Fixtures and Improvements 589,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 997,000      
Accumulated Depreciation (195,000)      
Popeyes [Member] | Channelview, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 220,000      
Buildings, Fixtures and Improvements 401,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 621,000      
Accumulated Depreciation (132,000)      
Popeyes [Member] | Austin, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,216,000      
Buildings, Fixtures and Improvements 533,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,749,000      
Accumulated Depreciation (177,000)      
Popeyes [Member] | Tampa, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 216,000      
Buildings, Fixtures and Improvements 508,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 724,000      
Accumulated Depreciation (160,000)      
Popeyes [Member] | Brandon, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 776,000      
Buildings, Fixtures and Improvements 961,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,737,000      
Accumulated Depreciation (319,000)      
Vacant [Member] | Kennesaw, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 210,000      
Buildings, Fixtures and Improvements 46,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 256,000      
Accumulated Depreciation (15,000)      
Vacant [Member] | Dallas, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 810,000      
Buildings, Fixtures and Improvements 1,656,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,466,000      
Accumulated Depreciation (550,000)      
Vacant [Member] | Houston, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 900,000      
Buildings, Fixtures and Improvements 1,749,000      
Costs Capitalized Subsequent to Acquisition (699,000)      
Gross Amount Carried at December 31, 2019 1,950,000      
Accumulated Depreciation (11,000)      
Vacant [Member] | Memphis, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 100,000      
Buildings, Fixtures and Improvements 283,000      
Costs Capitalized Subsequent to Acquisition 167,000      
Gross Amount Carried at December 31, 2019 550,000      
Accumulated Depreciation 0      
Vacant [Member] | Fountain Hills, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 241,000      
Buildings, Fixtures and Improvements 597,000      
Costs Capitalized Subsequent to Acquisition (227,000)      
Gross Amount Carried at December 31, 2019 611,000      
Accumulated Depreciation (55,000)      
Vacant [Member] | East Greenbush, NY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 404,000      
Buildings, Fixtures and Improvements 269,000      
Costs Capitalized Subsequent to Acquisition (548,000)      
Gross Amount Carried at December 31, 2019 125,000      
Accumulated Depreciation 0      
Vacant [Member] | Albemarle, NC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 483,000      
Buildings, Fixtures and Improvements 457,000      
Costs Capitalized Subsequent to Acquisition (590,000)      
Gross Amount Carried at December 31, 2019 350,000      
Accumulated Depreciation (3,000)      
Vacant [Member] | Midwest City, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,175,000      
Buildings, Fixtures and Improvements 1,708,000      
Costs Capitalized Subsequent to Acquisition (983,000)      
Gross Amount Carried at December 31, 2019 1,900,000      
Accumulated Depreciation (263,000)      
Vacant [Member] | Mobile, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 127,000      
Buildings, Fixtures and Improvements 276,000      
Costs Capitalized Subsequent to Acquisition (388,000)      
Gross Amount Carried at December 31, 2019 15,000      
Accumulated Depreciation 0      
Vacant [Member] | Nedrow, NY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 55,000      
Buildings, Fixtures and Improvements 80,000      
Costs Capitalized Subsequent to Acquisition (105,000)      
Gross Amount Carried at December 31, 2019 30,000      
Accumulated Depreciation 0      
Vacant [Member] | Youngstown, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 139,000      
Buildings, Fixtures and Improvements 232,000      
Costs Capitalized Subsequent to Acquisition (196,000)      
Gross Amount Carried at December 31, 2019 175,000      
Accumulated Depreciation 0      
Vacant [Member] | Brandon, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 860,000      
Buildings, Fixtures and Improvements 3,071,000      
Costs Capitalized Subsequent to Acquisition (2,202,000)      
Gross Amount Carried at December 31, 2019 1,729,000      
Accumulated Depreciation (229,000)      
Shoney's [Member] | Gadsden, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 220,000      
Buildings, Fixtures and Improvements 707,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 927,000      
Accumulated Depreciation (235,000)      
Shoney's [Member] | Grayson, KY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 406,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 826,000      
Accumulated Depreciation (135,000)      
Shoney's [Member] | Hattiesburg, MS [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 730,000      
Buildings, Fixtures and Improvements 618,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,348,000      
Accumulated Depreciation (205,000)      
Shoney's [Member] | Jackson, MS [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 360,000      
Buildings, Fixtures and Improvements 572,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 932,000      
Accumulated Depreciation (190,000)      
Shoney's [Member] | Summerville, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 350,000      
Buildings, Fixtures and Improvements 800,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,150,000      
Accumulated Depreciation (266,000)      
Shoney's [Member] | Cookeville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 510,000      
Buildings, Fixtures and Improvements 760,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,270,000      
Accumulated Depreciation (252,000)      
Shoney's [Member] | Lawrenceburg, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 330,000      
Buildings, Fixtures and Improvements 873,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,203,000      
Accumulated Depreciation (290,000)      
Shoney's [Member] | Charleston, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 190,000      
Buildings, Fixtures and Improvements 543,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 733,000      
Accumulated Depreciation (181,000)      
Shoney's [Member] | Lewisburg, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 110,000      
Buildings, Fixtures and Improvements 642,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 752,000      
Accumulated Depreciation (213,000)      
Shoney's [Member] | Princeton, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 90,000      
Buildings, Fixtures and Improvements 593,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 683,000      
Accumulated Depreciation (197,000)      
Shoney's [Member] | Ripley, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 200,000      
Buildings, Fixtures and Improvements 599,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 799,000      
Accumulated Depreciation (199,000)      
Sonny's Real Pit BBQ [Member] | Conyers, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 450,000      
Buildings, Fixtures and Improvements 663,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,113,000      
Accumulated Depreciation (220,000)      
Sweet Tomato [Member] | Coral Springs, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 790,000      
Buildings, Fixtures and Improvements 1,625,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,415,000      
Accumulated Depreciation (540,000)      
Taco Bell [Member] | Kennesaw, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 162,000      
Buildings, Fixtures and Improvements 601,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 763,000      
Accumulated Depreciation (199,000)      
Taco Bell [Member] | Kingston, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 280,000      
Buildings, Fixtures and Improvements 714,000      
Costs Capitalized Subsequent to Acquisition 300,000      
Gross Amount Carried at December 31, 2019 1,294,000      
Accumulated Depreciation (281,000)      
Taco Bell [Member] | Dallas, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 400,000      
Buildings, Fixtures and Improvements 1,225,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,625,000      
Accumulated Depreciation (403,000)      
Taco Bell [Member] | St. Louis, MO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 190,000      
Buildings, Fixtures and Improvements 1,951,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,141,000      
Accumulated Depreciation (589,000)      
Taco Bell [Member] | Mobile, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 160,000      
Buildings, Fixtures and Improvements 1,973,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,133,000      
Accumulated Depreciation (648,000)      
Taco Bell/ Pizza Hut [Member] | Dallas, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 1,582,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,002,000      
Accumulated Depreciation (520,000)      
Taco Cabana [Member] | San Antonio, TX 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 280,000      
Buildings, Fixtures and Improvements 1,695,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,975,000      
Accumulated Depreciation (557,000)      
Taco Cabana [Member] | Austin, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 700,000      
Buildings, Fixtures and Improvements 2,105,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,805,000      
Accumulated Depreciation (692,000)      
Taco Cabana [Member] | Pasadena, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 1,420,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,840,000      
Accumulated Depreciation (467,000)      
Taco Cabana [Member] | San Antonio, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 600,000      
Buildings, Fixtures and Improvements 1,955,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,555,000      
Accumulated Depreciation (643,000)      
Taco Cabana [Member] | Schertz, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 520,000      
Buildings, Fixtures and Improvements 1,408,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,928,000      
Accumulated Depreciation (463,000)      
Taco Cabana [Member] | San Antonio, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 500,000      
Buildings, Fixtures and Improvements 1,740,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,240,000      
Accumulated Depreciation (572,000)      
Taco Cabana [Member] | San Antonio, TX 4 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 500,000      
Buildings, Fixtures and Improvements 1,766,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,266,000      
Accumulated Depreciation (581,000)      
Texas Roadhouse [Member] | Cedar Rapids, IA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 430,000      
Buildings, Fixtures and Improvements 2,194,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,624,000      
Accumulated Depreciation (729,000)      
Texas Roadhouse [Member] | Grand Prairie, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 780,000      
Buildings, Fixtures and Improvements 1,867,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,647,000      
Accumulated Depreciation (621,000)      
Texas Roadhouse [Member] | College Station, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 670,000      
Buildings, Fixtures and Improvements 2,299,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,969,000      
Accumulated Depreciation (764,000)      
Wendy's [Member] | San Antonio, TX 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 707,000      
Buildings, Fixtures and Improvements 603,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,310,000      
Accumulated Depreciation (175,000)      
Wendy's [Member] | Knoxville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 330,000      
Buildings, Fixtures and Improvements 1,161,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,491,000      
Accumulated Depreciation (382,000)      
Wendy's [Member] | San Antonio, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 268,000      
Buildings, Fixtures and Improvements 630,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 898,000      
Accumulated Depreciation (209,000)      
Wendy's [Member] | Schertz, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 793,000      
Buildings, Fixtures and Improvements 109,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 902,000      
Accumulated Depreciation (37,000)      
Wendy's [Member] | Salisbury, MD [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 370,000      
Buildings, Fixtures and Improvements 1,299,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,669,000      
Accumulated Depreciation (427,000)      
Wendy's [Member] | Greenville, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 516,000      
Buildings, Fixtures and Improvements 631,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,147,000      
Accumulated Depreciation (200,000)      
Wendy's [Member] | Carmel, IN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 736,000      
Buildings, Fixtures and Improvements 211,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 947,000      
Accumulated Depreciation (96,000)      
Wendy's [Member] | Murfreesboro, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 586,000      
Buildings, Fixtures and Improvements 1,088,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,674,000      
Accumulated Depreciation (345,000)      
Wendy's [Member] | Arlington, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,322,000      
Buildings, Fixtures and Improvements 1,546,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,868,000      
Accumulated Depreciation (513,000)      
Wendy's [Member] | San Antonio, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 410,000      
Buildings, Fixtures and Improvements 451,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 861,000      
Accumulated Depreciation (150,000)      
Wendy's [Member] | San Antonio, TX 4 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 633,000      
Buildings, Fixtures and Improvements 1,388,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,021,000      
Accumulated Depreciation (372,000)      
Wendy's [Member] | Worcester, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 370,000      
Buildings, Fixtures and Improvements 1,288,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,658,000      
Accumulated Depreciation (423,000)      
Wendy's [Member] | Columbus, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 701,000      
Buildings, Fixtures and Improvements 1,787,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,488,000      
Accumulated Depreciation (593,000)      
Wendy's [Member] | Homewood, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 995,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 995,000      
Accumulated Depreciation 0      
Wendy's [Member] | Benton, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 478,000      
Buildings, Fixtures and Improvements 1,018,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,496,000      
Accumulated Depreciation (338,000)      
Wendy's [Member] | Bentonville, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 648,000      
Buildings, Fixtures and Improvements 708,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,356,000      
Accumulated Depreciation (235,000)      
Wendy's [Member] | Bryant, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 529,000      
Buildings, Fixtures and Improvements 575,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,104,000      
Accumulated Depreciation (191,000)      
Wendy's [Member] | Cabot, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 524,000      
Buildings, Fixtures and Improvements 707,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,231,000      
Accumulated Depreciation (234,000)      
Wendy's [Member] | Conway, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 478,000      
Buildings, Fixtures and Improvements 594,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,072,000      
Accumulated Depreciation (197,000)      
Wendy's [Member] | Conway, AR 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 482,000      
Buildings, Fixtures and Improvements 833,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,315,000      
Accumulated Depreciation (276,000)      
Wendy's [Member] | Fayetteville, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 408,000      
Buildings, Fixtures and Improvements 830,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,238,000      
Accumulated Depreciation (275,000)      
Wendy's [Member] | Fort Smith, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 195,000      
Buildings, Fixtures and Improvements 1,186,000      
Costs Capitalized Subsequent to Acquisition (11,000)      
Gross Amount Carried at December 31, 2019 1,370,000      
Accumulated Depreciation (394,000)      
Wendy's [Member] | Fort Smith, AR 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 63,000      
Buildings, Fixtures and Improvements 1,016,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,079,000      
Accumulated Depreciation (337,000)      
Wendy's [Member] | Little Rock, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 278,000      
Buildings, Fixtures and Improvements 878,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,156,000      
Accumulated Depreciation (291,000)      
Wendy's [Member] | Little Rock, AR 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 990,000      
Buildings, Fixtures and Improvements 623,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,613,000      
Accumulated Depreciation (514,000)      
Wendy's [Member] | Little Rock, AR 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 605,000      
Buildings, Fixtures and Improvements 463,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,068,000      
Accumulated Depreciation (154,000)      
Wendy's [Member] | Rogers, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 579,000      
Buildings, Fixtures and Improvements 912,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,491,000      
Accumulated Depreciation (303,000)      
Wendy's [Member] | Russellville, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 356,000      
Buildings, Fixtures and Improvements 638,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 994,000      
Accumulated Depreciation (211,000)      
Wendy's [Member] | Springdale, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 323,000      
Buildings, Fixtures and Improvements 896,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,219,000      
Accumulated Depreciation (297,000)      
Wendy's [Member] | Springdale, AR 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 410,000      
Buildings, Fixtures and Improvements 821,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,231,000      
Accumulated Depreciation (272,000)      
Wendy's [Member] | Van Buren, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 197,000      
Buildings, Fixtures and Improvements 748,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 945,000      
Accumulated Depreciation (248,000)      
Wendy's [Member] | Norwich, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 703,000      
Buildings, Fixtures and Improvements 937,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,640,000      
Accumulated Depreciation (311,000)      
Wendy's [Member] | Columbus, GA 3 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 605,000      
Buildings, Fixtures and Improvements 776,000      
Costs Capitalized Subsequent to Acquisition (12,000)      
Gross Amount Carried at December 31, 2019 1,369,000      
Accumulated Depreciation (257,000)      
Wendy's [Member] | Millville, NJ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 373,000      
Buildings, Fixtures and Improvements 1,169,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,542,000      
Accumulated Depreciation (388,000)      
Wendy's [Member] | Columbia, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,368,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,368,000      
Accumulated Depreciation (76,000)      
Wendy's [Member] | Burlington, WA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 425,000      
Buildings, Fixtures and Improvements 806,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,231,000      
Accumulated Depreciation (267,000)      
Wendy's [Member] | Corpus Christi, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 646,000      
Buildings, Fixtures and Improvements 1,198,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 1,845,000      
Accumulated Depreciation (381,000)      
Ale House [Member] | St. Petersburg, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 930,000      
Buildings, Fixtures and Improvements 3,116,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 4,046,000      
Accumulated Depreciation (1,036,000)      
Applebee's [Member] | San Antonio, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 732,000      
Buildings, Fixtures and Improvements 1,796,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,528,000      
Accumulated Depreciation (601,000)      
Applebee's [Member] | St. Petersburg, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 2,329,000      
Buildings, Fixtures and Improvements 3,493,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 5,822,000      
Accumulated Depreciation (1,200,000)      
Applebee's [Member] | Clinton, IA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 490,000      
Buildings, Fixtures and Improvements 1,184,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,674,000      
Accumulated Depreciation (393,000)      
Applebee's [Member] | Fort Dodge, IA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 0      
Buildings, Fixtures and Improvements 1,363,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,363,000      
Accumulated Depreciation (656,000)      
Applebee's [Member] | Marshalltown, IA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 660,000      
Buildings, Fixtures and Improvements 1,175,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,835,000      
Accumulated Depreciation (390,000)      
Applebee's [Member] | Mason City, IA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 340,000      
Buildings, Fixtures and Improvements 1,495,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,835,000      
Accumulated Depreciation (497,000)      
Applebee's [Member] | Muscatine, IA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 330,000      
Buildings, Fixtures and Improvements 1,266,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,596,000      
Accumulated Depreciation (421,000)      
Applebee's [Member] | Sterling, IL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 390,000      
Buildings, Fixtures and Improvements 1,291,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,681,000      
Accumulated Depreciation (429,000)      
Applebee's [Member] | Roseburg, OR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 717,000      
Buildings, Fixtures and Improvements 1,673,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,390,000      
Accumulated Depreciation (570,000)      
Applebee's [Member] | Greenville, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 600,000      
Buildings, Fixtures and Improvements 2,166,000      
Costs Capitalized Subsequent to Acquisition (1,528,000)      
Gross Amount Carried at December 31, 2019 1,238,000      
Accumulated Depreciation (108,000)      
Applebee's [Member] | North Canton, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 152,000      
Buildings, Fixtures and Improvements 838,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 990,000      
Accumulated Depreciation (281,000)      
Applebee's [Member] | Largo, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 2,334,000      
Buildings, Fixtures and Improvements 3,501,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 5,835,000      
Accumulated Depreciation (1,202,000)      
Applebee's [Member] | Brandon, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 2,453,000      
Buildings, Fixtures and Improvements 3,647,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 6,100,000      
Accumulated Depreciation (1,222,000)      
Applebee's [Member] | Plant City, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 2,079,000      
Buildings, Fixtures and Improvements 2,869,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 4,948,000      
Accumulated Depreciation (961,000)      
Applebee's [Member] | Valrico, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,202,000      
Buildings, Fixtures and Improvements 3,274,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 4,476,000      
Accumulated Depreciation (1,097,000)      
Applebee's [Member] | Newton, KS [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 504,000      
Buildings, Fixtures and Improvements 1,569,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,073,000      
Accumulated Depreciation (525,000)      
Applebee's [Member] | Ocean Springs, MS [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 673,000      
Buildings, Fixtures and Improvements 1,708,000      
Costs Capitalized Subsequent to Acquisition (1,359,000)      
Gross Amount Carried at December 31, 2019 1,022,000      
Accumulated Depreciation (42,000)      
Applebee's [Member] | Corpus Christi, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 563,000      
Buildings, Fixtures and Improvements 2,926,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,489,000      
Accumulated Depreciation (980,000)      
Arby's [Member] | Kennesaw, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 583,000      
Buildings, Fixtures and Improvements 840,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,423,000      
Accumulated Depreciation (279,000)      
Arby's [Member] | Kansas City, KS [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 280,000      
Buildings, Fixtures and Improvements 364,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 644,000      
Accumulated Depreciation (120,000)      
Arby's [Member] | Salina, KS [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 540,000      
Buildings, Fixtures and Improvements 300,000      
Costs Capitalized Subsequent to Acquisition 64,000      
Gross Amount Carried at December 31, 2019 904,000      
Accumulated Depreciation (26,000)      
Arby's [Member] | Topeka, KS 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 270,000      
Buildings, Fixtures and Improvements 433,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 703,000      
Accumulated Depreciation (142,000)      
Arby's [Member] | Alma, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 380,000      
Buildings, Fixtures and Improvements 408,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 788,000      
Accumulated Depreciation (134,000)      
Arby's [Member] | Chesterfield, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 210,000      
Buildings, Fixtures and Improvements 841,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,051,000      
Accumulated Depreciation (276,000)      
Arby's [Member] | Davison, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 631,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,051,000      
Accumulated Depreciation (208,000)      
Arby's [Member] | Flint, MI 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 230,000      
Buildings, Fixtures and Improvements 1,428,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,658,000      
Accumulated Depreciation (470,000)      
Arby's [Member] | Midland, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 340,000      
Buildings, Fixtures and Improvements 753,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,093,000      
Accumulated Depreciation (248,000)      
Arby's [Member] | Waterford, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 180,000      
Buildings, Fixtures and Improvements 962,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,142,000      
Accumulated Depreciation (316,000)      
Arby's [Member] | Port Huron, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 210,000      
Buildings, Fixtures and Improvements 868,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,078,000      
Accumulated Depreciation (285,000)      
Arby's [Member] | Allentown, PA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 600,000      
Buildings, Fixtures and Improvements 1,652,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,252,000      
Accumulated Depreciation (543,000)      
Arby's [Member] | Carlisle, PA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 200,000      
Buildings, Fixtures and Improvements 472,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 672,000      
Accumulated Depreciation (155,000)      
Arby's [Member] | Hanover, PA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 400,000      
Buildings, Fixtures and Improvements 921,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,321,000      
Accumulated Depreciation (303,000)      
Arby's [Member] | Amarillo, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 260,000      
Buildings, Fixtures and Improvements 627,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 887,000      
Accumulated Depreciation (206,000)      
Arby's [Member] | Memphis, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 449,000      
Buildings, Fixtures and Improvements 835,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,284,000      
Accumulated Depreciation (265,000)      
Arby's [Member] | Guntersville, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 142,000      
Buildings, Fixtures and Improvements 503,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 645,000      
Accumulated Depreciation (167,000)      
Arby's [Member] | Phoenix, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 559,000      
Buildings, Fixtures and Improvements 618,000      
Costs Capitalized Subsequent to Acquisition 200,000      
Gross Amount Carried at December 31, 2019 1,377,000      
Accumulated Depreciation (219,000)      
Arby's [Member] | Canton, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 370,000      
Buildings, Fixtures and Improvements 1,200,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,570,000      
Accumulated Depreciation (395,000)      
Yemen Kitchen [Member] | Raleigh, NC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 230,000      
Buildings, Fixtures and Improvements 654,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 884,000      
Accumulated Depreciation (215,000)      
Buca di Beppo Italian [Member] | Wheeling, IL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 450,000      
Buildings, Fixtures and Improvements 1,272,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,722,000      
Accumulated Depreciation (423,000)      
Buca di Beppo Italian [Member] | Westlake, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 370,000      
Buildings, Fixtures and Improvements 887,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,257,000      
Accumulated Depreciation (295,000)      
Burger King [Member] | Austin, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 666,000      
Buildings, Fixtures and Improvements 999,000      
Costs Capitalized Subsequent to Acquisition (516,000)      
Gross Amount Carried at December 31, 2019 1,149,000      
Accumulated Depreciation (161,000)      
Burger King [Member] | Tucson, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 300,000      
Buildings, Fixtures and Improvements 1,307,000      
Costs Capitalized Subsequent to Acquisition 250,000      
Gross Amount Carried at December 31, 2019 1,857,000      
Accumulated Depreciation (446,000)      
Burger King [Member] | Fort Oglethorpe, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 170,000      
Buildings, Fixtures and Improvements 2,175,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,345,000      
Accumulated Depreciation (715,000)      
Burger King [Member] | Caribou, ME [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 770,000      
Buildings, Fixtures and Improvements 440,000      
Costs Capitalized Subsequent to Acquisition (853,000)      
Gross Amount Carried at December 31, 2019 357,000      
Accumulated Depreciation (2,000)      
Burger King [Member] | Cohoes, NY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 270,000      
Buildings, Fixtures and Improvements 563,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 833,000      
Accumulated Depreciation (185,000)      
Burger King [Member] | Montgomery, NY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 480,000      
Buildings, Fixtures and Improvements 1,042,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,522,000      
Accumulated Depreciation (343,000)      
Burger King [Member] | Schenectady, NY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 380,000      
Buildings, Fixtures and Improvements 936,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,316,000      
Accumulated Depreciation (308,000)      
Burger King [Member] | Elko, NV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 260,000      
Buildings, Fixtures and Improvements 1,001,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,261,000      
Accumulated Depreciation (329,000)      
Burger King [Member] | Willoughby, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 410,000      
Buildings, Fixtures and Improvements 1,005,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,415,000      
Accumulated Depreciation (330,000)      
Burger King [Member] | Ardmore, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 270,000      
Buildings, Fixtures and Improvements 1,023,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,293,000      
Accumulated Depreciation (336,000)      
Burger King [Member] | Roseburg, OR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 350,000      
Buildings, Fixtures and Improvements 886,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,236,000      
Accumulated Depreciation (291,000)      
Burger King [Member] | Gaffney, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 370,000      
Buildings, Fixtures and Improvements 880,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,250,000      
Accumulated Depreciation (289,000)      
Burger King [Member] | Greenville, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 420,000      
Buildings, Fixtures and Improvements 571,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 991,000      
Accumulated Depreciation (188,000)      
Burger King [Member] | Bluefield, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 210,000      
Buildings, Fixtures and Improvements 1,163,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,373,000      
Accumulated Depreciation (382,000)      
Burger King [Member] | Anchorage, AK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 427,000      
Buildings, Fixtures and Improvements 489,000      
Costs Capitalized Subsequent to Acquisition 200,000      
Gross Amount Carried at December 31, 2019 1,116,000      
Accumulated Depreciation (162,000)      
Burger King [Member] | Largo, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 683,000      
Buildings, Fixtures and Improvements 412,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,095,000      
Accumulated Depreciation (137,000)      
Burger King [Member] | Springfield, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 983,000      
Buildings, Fixtures and Improvements 516,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,499,000      
Accumulated Depreciation (171,000)      
Burger King [Member] | Spanaway, WA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 509,000      
Buildings, Fixtures and Improvements 1,628,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,137,000      
Accumulated Depreciation (540,000)      
Burger King [Member] | Texas City, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 421,000      
Buildings, Fixtures and Improvements 782,000      
Costs Capitalized Subsequent to Acquisition 300,000      
Gross Amount Carried at December 31, 2019 1,503,000      
Accumulated Depreciation (285,000)      
Charleston's [Member] | Carmel, IN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 140,000      
Buildings, Fixtures and Improvements 3,016,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,156,000      
Accumulated Depreciation (1,002,000)      
Dairy Queen [Member] | Mauldin, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 133,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 133,000      
Accumulated Depreciation 0      
Dairy Queen [Member] | Alto, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 50,000      
Buildings, Fixtures and Improvements 110,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 160,000      
Accumulated Depreciation (36,000)      
Dairy Queen [Member] | Pineland, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 40,000      
Buildings, Fixtures and Improvements 120,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 160,000      
Accumulated Depreciation (40,000)      
Dairy Queen [Member] | Silsbee, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 60,000      
Buildings, Fixtures and Improvements 100,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 160,000      
Accumulated Depreciation (33,000)      
Dunkin Donuts/Baskin-Robbins [Member] | Dearborn Heights, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 230,000      
Buildings, Fixtures and Improvements 846,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,076,000      
Accumulated Depreciation (278,000)      
Grandy's [Member] | Mesquite, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 871,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 871,000      
Accumulated Depreciation 0      
Grandy's [Member] | Dallas, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 725,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 725,000      
Accumulated Depreciation 0      
Grandy's [Member] | Ardmore, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 454,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 454,000      
Accumulated Depreciation 0      
Grandy's [Member] | Moore, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 320,000      
Buildings, Fixtures and Improvements 428,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 748,000      
Accumulated Depreciation 0      
Grandy's [Member] | Oklahoma City, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 260,000      
Buildings, Fixtures and Improvements 380,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 640,000      
Accumulated Depreciation 0      
Grandy's [Member] | Oklahoma City, OK 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 320,000      
Buildings, Fixtures and Improvements 289,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 609,000      
Accumulated Depreciation 0      
Grandy's [Member] | Arlington, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 734,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 734,000      
Accumulated Depreciation 0      
Grandy's [Member] | Carrollton, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 847,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 847,000      
Accumulated Depreciation 0      
Grandy's [Member] | Fort Worth, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 777,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 777,000      
Accumulated Depreciation 0      
Grandy's [Member] | Fort Worth, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 811,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 811,000      
Accumulated Depreciation 0      
Grandy's [Member] | Garland, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 623,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 623,000      
Accumulated Depreciation 0      
Grandy's [Member] | Garland, TX 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 859,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 859,000      
Accumulated Depreciation 0      
Grandy's [Member] | Irving, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 871,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 871,000      
Accumulated Depreciation 0      
Grandy's [Member] | Lancaster, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 780,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 780,000      
Accumulated Depreciation 0      
Grandy's [Member] | Plano, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 871,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 871,000      
Accumulated Depreciation 0      
Hardee's [Member] | Aiken, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 220,000      
Buildings, Fixtures and Improvements 450,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 670,000      
Accumulated Depreciation (148,000)      
Hardee's [Member] | Canton, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 488,000      
Buildings, Fixtures and Improvements 539,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,027,000      
Accumulated Depreciation (179,000)      
Hardee's [Member] | Mount Vernon, IA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 320,000      
Buildings, Fixtures and Improvements 480,000      
Costs Capitalized Subsequent to Acquisition (6,000)      
Gross Amount Carried at December 31, 2019 794,000      
Accumulated Depreciation (159,000)      
McAlisters [Member] | Murfreesboro, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 310,000      
Buildings, Fixtures and Improvements 720,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,030,000      
Accumulated Depreciation (239,000)      
Lifetime Dentistry Chickasha [Member] | Chickasha, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 100,000      
Buildings, Fixtures and Improvements 186,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 286,000      
Accumulated Depreciation (64,000)      
Spaghetti Warehouse [Member] | San Antonio, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,140,000      
Buildings, Fixtures and Improvements 1,434,000      
Costs Capitalized Subsequent to Acquisition (1,063,000)      
Gross Amount Carried at December 31, 2019 1,511,000      
Accumulated Depreciation (126,000)      
Spaghetti Warehouse [Member] | Arlington, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 630,000      
Buildings, Fixtures and Improvements 1,400,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,030,000      
Accumulated Depreciation (465,000)      
Subway [Member] | Knoxville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 160,000      
Buildings, Fixtures and Improvements 349,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 509,000      
Accumulated Depreciation (115,000)      
Accomplishments Through People [Member] | Columbus, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 170,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 170,000      
Accumulated Depreciation 0      
Captain D's [Member] | Memphis, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 230,000      
Buildings, Fixtures and Improvements 338,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 568,000      
Accumulated Depreciation (111,000)      
Captain D's [Member] | Duncanville, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 295,000      
Buildings, Fixtures and Improvements 246,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 541,000      
Accumulated Depreciation (82,000)      
Checkers [Member] | Tampa, FL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 736,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 736,000      
Accumulated Depreciation 0      
Denny's [Member] | Pasadena, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 500,000      
Buildings, Fixtures and Improvements 1,316,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,816,000      
Accumulated Depreciation (438,000)      
Denny's [Member] | Greenville, SC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 570,000      
Buildings, Fixtures and Improvements 554,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,124,000      
Accumulated Depreciation (184,000)      
Denny's [Member] | Phoenix, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 825,000      
Buildings, Fixtures and Improvements 1,237,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,062,000      
Accumulated Depreciation (425,000)      
Denny's [Member] | Peoria, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 310,000      
Buildings, Fixtures and Improvements 457,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 767,000      
Accumulated Depreciation (153,000)      
Denny's [Member] | Tempe, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 378,000      
Buildings, Fixtures and Improvements 245,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 623,000      
Accumulated Depreciation (80,000)      
Denny's [Member] | Idaho Falls, ID [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 196,000      
Buildings, Fixtures and Improvements 432,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 628,000      
Accumulated Depreciation (138,000)      
FedEx [Member] | Port Huron, MI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 125,000      
Buildings, Fixtures and Improvements 1,121,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,246,000      
Accumulated Depreciation (409,000)      
FedEx [Member] | Tempe, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 2,914,000      
Buildings, Fixtures and Improvements 12,300,000      
Costs Capitalized Subsequent to Acquisition 163,000      
Gross Amount Carried at December 31, 2019 15,377,000      
Accumulated Depreciation (3,316,000)      
FedEx [Member] | Homewood, AL [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 522,000      
Buildings, Fixtures and Improvements 779,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,301,000      
Accumulated Depreciation (253,000)      
Golden Corral [Member] | Cookeville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 800,000      
Buildings, Fixtures and Improvements 1,937,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,737,000      
Accumulated Depreciation (644,000)      
Golden Corral [Member] | Houston, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,147,000      
Buildings, Fixtures and Improvements 2,447,000      
Costs Capitalized Subsequent to Acquisition (64,000)      
Gross Amount Carried at December 31, 2019 3,530,000      
Accumulated Depreciation (820,000)      
Golden Corral [Member] | Norman, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 345,000      
Buildings, Fixtures and Improvements 2,107,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,452,000      
Accumulated Depreciation (706,000)      
Golden Corral [Member] | College Station, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,265,000      
Buildings, Fixtures and Improvements 1,718,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,983,000      
Accumulated Depreciation (575,000)      
Golden Corral [Member] | Toledo, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 838,000      
Buildings, Fixtures and Improvements 3,333,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 4,171,000      
Accumulated Depreciation (934,000)      
Lee's Famous Recipe Chicken [Member] | Florissant, MO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 306,000      
Buildings, Fixtures and Improvements 560,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 866,000      
Accumulated Depreciation (186,000)      
Lee's Famous Recipe Chicken [Member] | St. Ann, MO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 187,000      
Buildings, Fixtures and Improvements 571,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 758,000      
Accumulated Depreciation (189,000)      
Lee's Famous Recipe Chicken [Member] | St. Louis, MO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 107,000      
Buildings, Fixtures and Improvements 874,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 981,000      
Accumulated Depreciation (290,000)      
Penske [Member] | Bedford, OH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 183,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 183,000      
Accumulated Depreciation 0      
TGI Fridays [Member] | Warwick, RI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,228,000      
Buildings, Fixtures and Improvements 2,775,000      
Costs Capitalized Subsequent to Acquisition (1,253,000)      
Gross Amount Carried at December 31, 2019 2,750,000      
Accumulated Depreciation (452,000)      
Verizon Wireless [Member] | Statesville, NC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 207,000      
Buildings, Fixtures and Improvements 459,000      
Costs Capitalized Subsequent to Acquisition 27,000      
Gross Amount Carried at December 31, 2019 693,000      
Accumulated Depreciation (151,000)      
Whataburger [Member] | El Campo, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 693,000      
Buildings, Fixtures and Improvements 1,013,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,706,000      
Accumulated Depreciation (336,000)      
Abuelo's [Member] | Rogers, AR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 825,000      
Buildings, Fixtures and Improvements 2,296,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,121,000      
Accumulated Depreciation (769,000)      
Aliberto's Mexican Food [Member] | Holbrook, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 32,000      
Buildings, Fixtures and Improvements 96,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 128,000      
Accumulated Depreciation $ (32,000)