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Schedule III - Real Estate and Accumulated Depreciation Section 9 (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)
Applebee's [Member] | Tualatin, 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 1,116,000      
Buildings, Fixtures and Improvements 2,072,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,188,000      
Accumulated Depreciation (712,000)      
Applebee's [Member] | Richland, 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 1,112,000      
Buildings, Fixtures and Improvements 2,064,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,176,000      
Accumulated Depreciation (709,000)      
Applebee's [Member] | Vancouver, WA 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 718,000      
Buildings, Fixtures and Improvements 1,675,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,393,000      
Accumulated Depreciation (575,000)      
Applebee's [Member] | Augusta, 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 1,254,000      
Buildings, Fixtures and Improvements 2,329,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,583,000      
Accumulated Depreciation (800,000)      
Applebee's [Member] | Rockford, 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 0      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 2,110,000      
Gross Amount Carried at December 31, 2019 2,110,000      
Accumulated Depreciation (52,000)      
Applebee's [Member] | Lakeland, 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 1,283,000      
Buildings, Fixtures and Improvements 2,383,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,666,000      
Accumulated Depreciation (818,000)      
Arby's [Member] | Apopka, 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 464,000      
Buildings, Fixtures and Improvements 697,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,161,000      
Accumulated Depreciation (221,000)      
Arby's [Member] | Atlanta, 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 1,207,000      
Buildings, Fixtures and Improvements 987,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,194,000      
Accumulated Depreciation (313,000)      
Arby's [Member] | Hopkinsville, 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 432,000      
Buildings, Fixtures and Improvements 528,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 960,000      
Accumulated Depreciation (168,000)      
Arby's [Member] | Grandville, 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 1,133,000      
Buildings, Fixtures and Improvements 755,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 1,889,000      
Accumulated Depreciation (240,000)      
Arby's [Member] | Wyoming, 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 1,513,000      
Buildings, Fixtures and Improvements 648,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,161,000      
Accumulated Depreciation (206,000)      
Arby's [Member] | Chattanooga, 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 201,000      
Buildings, Fixtures and Improvements 469,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 670,000      
Accumulated Depreciation (149,000)      
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] | Walker, 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 360,000      
Buildings, Fixtures and Improvements 1,002,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,362,000      
Accumulated Depreciation (329,000)      
Arby's [Member] | Orlando, 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 251,000      
Buildings, Fixtures and Improvements 585,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 836,000      
Accumulated Depreciation (186,000)      
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] | Indianapolis, IN 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 370,000      
Buildings, Fixtures and Improvements 1,130,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,500,000      
Accumulated Depreciation (371,000)      
Bojangles [Member] | Denver, 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 1,013,000      
Buildings, Fixtures and Improvements 1,881,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,894,000      
Accumulated Depreciation (597,000)      
Bojangles [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 646,000      
Buildings, Fixtures and Improvements 1,937,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,583,000      
Accumulated Depreciation (615,000)      
Bruegger's Bagels [Member] | Durham, 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 312,000      
Buildings, Fixtures and Improvements 728,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,040,000      
Accumulated Depreciation (231,000)      
Buffalo Wild Wings [Member] | Langhorne, 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 815,000      
Buildings, Fixtures and Improvements 815,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,630,000      
Accumulated Depreciation (280,000)      
Burger King [Member] | Atlanta, 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 380,000      
Buildings, Fixtures and Improvements 499,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 879,000      
Accumulated Depreciation (164,000)      
Burger King [Member] | Chattanooga, 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 740,000      
Buildings, Fixtures and Improvements 1,591,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,331,000      
Accumulated Depreciation (523,000)      
Burger King [Member] | Durham, 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 170,000      
Buildings, Fixtures and Improvements 352,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 522,000      
Accumulated Depreciation (116,000)      
Burger King [Member] | Andalusia, 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 181,000      
Buildings, Fixtures and Improvements 1,025,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,206,000      
Accumulated Depreciation (325,000)      
Burger King [Member] | Atmore, 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 181,000      
Buildings, Fixtures and Improvements 723,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 904,000      
Accumulated Depreciation (230,000)      
Burger King [Member] | Brewton, 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 307,000      
Buildings, Fixtures and Improvements 920,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,227,000      
Accumulated Depreciation (292,000)      
Burger King [Member] | Dothan, 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 628,000      
Buildings, Fixtures and Improvements 1,167,000      
Costs Capitalized Subsequent to Acquisition (14,000)      
Gross Amount Carried at December 31, 2019 1,781,000      
Accumulated Depreciation (370,000)      
Burger King [Member] | Dothan, AL 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 594,000      
Buildings, Fixtures and Improvements 1,104,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,698,000      
Accumulated Depreciation (350,000)      
Burger King [Member] | Enterprise, 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 437,000      
Buildings, Fixtures and Improvements 655,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,092,000      
Accumulated Depreciation (208,000)      
Burger King [Member] | Evergreen, 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 172,000      
Buildings, Fixtures and Improvements 689,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 861,000      
Accumulated Depreciation (219,000)      
Burger King [Member] | Monroeville, 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 325,000      
Buildings, Fixtures and Improvements 604,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 929,000      
Accumulated Depreciation (192,000)      
Burger King [Member] | Opp, 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 214,000      
Buildings, Fixtures and Improvements 857,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,071,000      
Accumulated Depreciation (272,000)      
Burger King [Member] | Troy, 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 461,000      
Buildings, Fixtures and Improvements 1,383,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,844,000      
Accumulated Depreciation (439,000)      
Burger King [Member] | Defuniak 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 362,000      
Buildings, Fixtures and Improvements 1,087,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,449,000      
Accumulated Depreciation (345,000)      
Burger King [Member] | Niceville, 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 598,000      
Buildings, Fixtures and Improvements 399,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 997,000      
Accumulated Depreciation (127,000)      
Burger King [Member] | Panama 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 319,000      
Buildings, Fixtures and Improvements 956,000      
Costs Capitalized Subsequent to Acquisition (640,000)      
Gross Amount Carried at December 31, 2019 635,000      
Accumulated Depreciation (136,000)      
Burger King [Member] | Springfield, 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 324,000      
Buildings, Fixtures and Improvements 971,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,295,000      
Accumulated Depreciation (308,000)      
Burger King [Member] | Tallahassee, 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 720,000      
Buildings, Fixtures and Improvements 720,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,440,000      
Accumulated Depreciation (228,000)      
Burger King [Member] | Tallahassee, FL 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 843,000      
Buildings, Fixtures and Improvements 454,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,297,000      
Accumulated Depreciation (144,000)      
Burger King [Member] | Augusta, 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 693,000      
Buildings, Fixtures and Improvements 2,080,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,773,000      
Accumulated Depreciation (660,000)      
Burger King [Member] | Bainbridge, 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 347,000      
Buildings, Fixtures and Improvements 1,042,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,389,000      
Accumulated Depreciation (331,000)      
Burger King [Member] | Cairo, 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 245,000      
Buildings, Fixtures and Improvements 981,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,226,000      
Accumulated Depreciation (311,000)      
Burger King [Member] | Roswell, 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 495,000      
Buildings, Fixtures and Improvements 1,156,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,651,000      
Accumulated Depreciation (367,000)      
Burger King [Member] | Valdosta, 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 564,000      
Buildings, Fixtures and Improvements 376,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 940,000      
Accumulated Depreciation (119,000)      
Burger King [Member] | Des Moines, 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 1,160,000      
Buildings, Fixtures and Improvements 949,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,109,000      
Accumulated Depreciation (301,000)      
Burger King [Member] | Perry, 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 557,000      
Buildings, Fixtures and Improvements 680,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,237,000      
Accumulated Depreciation (216,000)      
Burger King [Member] | Red Oak, 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 334,000      
Buildings, Fixtures and Improvements 1,002,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,336,000      
Accumulated Depreciation (318,000)      
Burger King [Member] | Shenandoah, 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 313,000      
Buildings, Fixtures and Improvements 582,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 895,000      
Accumulated Depreciation (185,000)      
Burger King [Member] | Stuart, 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 607,000      
Buildings, Fixtures and Improvements 911,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,518,000      
Accumulated Depreciation (289,000)      
Burger King [Member] | Maywood, 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 860,000      
Buildings, Fixtures and Improvements 1,051,000      
Costs Capitalized Subsequent to Acquisition (357,000)      
Gross Amount Carried at December 31, 2019 1,554,000      
Accumulated Depreciation (194,000)      
Burger King [Member] | Detroit, 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 614,000      
Buildings, Fixtures and Improvements 331,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 945,000      
Accumulated Depreciation (105,000)      
Burger King [Member] | Grand Rapids, MI 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 346,000      
Buildings, Fixtures and Improvements 807,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,153,000      
Accumulated Depreciation (256,000)      
Burger King [Member] | Hudsonville, 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 451,000      
Buildings, Fixtures and Improvements 676,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,127,000      
Accumulated Depreciation (215,000)      
Burger King [Member] | L'Anse, 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 32,000      
Buildings, Fixtures and Improvements 616,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 648,000      
Accumulated Depreciation (196,000)      
Burger King [Member] | Walker, 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 305,000      
Buildings, Fixtures and Improvements 711,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,016,000      
Accumulated Depreciation (226,000)      
Burger King [Member] | Hastings, 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 328,000      
Buildings, Fixtures and Improvements 608,000      
Costs Capitalized Subsequent to Acquisition 200,000      
Gross Amount Carried at December 31, 2019 1,136,000      
Accumulated Depreciation (211,000)      
Burger King [Member] | Clarksdale, 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 865,000      
Buildings, Fixtures and Improvements 865,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,730,000      
Accumulated Depreciation (275,000)      
Burger King [Member] | Cleveland, 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 688,000      
Buildings, Fixtures and Improvements 1,606,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,294,000      
Accumulated Depreciation (510,000)      
Burger King [Member] | Greenville, 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 573,000      
Buildings, Fixtures and Improvements 1,337,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,910,000      
Accumulated Depreciation (424,000)      
Burger King [Member] | Greenville, MS 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 351,000      
Buildings, Fixtures and Improvements 820,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,171,000      
Accumulated Depreciation (260,000)      
Burger King [Member] | Greenwood, 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 692,000      
Buildings, Fixtures and Improvements 1,038,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,730,000      
Accumulated Depreciation (329,000)      
Burger King [Member] | Grenada, 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 536,000      
Buildings, Fixtures and Improvements 805,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,341,000      
Accumulated Depreciation (255,000)      
Burger King [Member] | Philadelphia, 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 402,000      
Buildings, Fixtures and Improvements 939,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,341,000      
Accumulated Depreciation (298,000)      
Burger King [Member] | Yazoo City, 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 489,000      
Buildings, Fixtures and Improvements 909,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,398,000      
Accumulated Depreciation (288,000)      
Burger King [Member] | Blair, NE [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 272,000      
Buildings, Fixtures and Improvements 1,087,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,359,000      
Accumulated Depreciation (345,000)      
Burger King [Member] | Wahoo, NE [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 1,109,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,305,000      
Accumulated Depreciation (352,000)      
Burger King [Member] | Nashua, NH [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 655,000      
Buildings, Fixtures and Improvements 655,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,310,000      
Accumulated Depreciation (208,000)      
Burger King [Member] | Dayton, 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 569,000      
Buildings, Fixtures and Improvements 466,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,035,000      
Accumulated Depreciation (148,000)      
Burger King [Member] | Harrisburg, 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 619,000      
Buildings, Fixtures and Improvements 412,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,031,000      
Accumulated Depreciation (131,000)      
Burger King [Member] | North Augusta, 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 256,000      
Buildings, Fixtures and Improvements 1,451,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,707,000      
Accumulated Depreciation (460,000)      
Burger King [Member] | North Augusta, SC 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 1,050,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,500,000      
Accumulated Depreciation (333,000)      
Burger King [Member] | Gallatin, 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 199,000      
Buildings, Fixtures and Improvements 463,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 662,000      
Accumulated Depreciation (147,000)      
Burger King [Member] | Laredo, 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 684,000      
Buildings, Fixtures and Improvements 1,026,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,710,000      
Accumulated Depreciation (325,000)      
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)      
Burger King [Member] | Rhinelander, WI [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 606,000      
Costs Capitalized Subsequent to Acquisition 200,000      
Gross Amount Carried at December 31, 2019 1,066,000      
Accumulated Depreciation (192,000)      
Burger King [Member] | Springfield, 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 354,000      
Buildings, Fixtures and Improvements 677,000      
Costs Capitalized Subsequent to Acquisition (562,000)      
Gross Amount Carried at December 31, 2019 469,000      
Accumulated Depreciation (19,000)      
Castle Dental [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 256,000      
Buildings, Fixtures and Improvements 256,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 512,000      
Accumulated Depreciation (88,000)      
Checkers [Member] | Jacksonville, 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 731,000      
Buildings, Fixtures and Improvements 1,096,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,827,000      
Accumulated Depreciation (348,000)      
Checkers [Member] | Miami, 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 621,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 621,000      
Accumulated Depreciation 0      
Checkers [Member] | Orlando, 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 1,033,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,033,000      
Accumulated Depreciation 0      
Chevy's [Member] | Miami, 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 1,455,000      
Buildings, Fixtures and Improvements 783,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,238,000      
Accumulated Depreciation (269,000)      
Church's Chicken [Member] | Atmore, 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 144,000      
Buildings, Fixtures and Improvements 574,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 718,000      
Accumulated Depreciation (182,000)      
Church's Chicken [Member] | Bay Minette, 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 134,000      
Buildings, Fixtures and Improvements 757,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 891,000      
Accumulated Depreciation (240,000)      
Church's Chicken [Member] | Flomaton, 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 173,000      
Buildings, Fixtures and Improvements 518,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 691,000      
Accumulated Depreciation (164,000)      
Church's Chicken [Member] | Jackson, 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 719,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 846,000      
Accumulated Depreciation (228,000)      
Church's Chicken [Member] | Orlando, 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 254,000      
Buildings, Fixtures and Improvements 380,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 634,000      
Accumulated Depreciation (121,000)      
Church's Chicken [Member] | Augusta, GA 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 256,000      
Buildings, Fixtures and Improvements 597,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 853,000      
Accumulated Depreciation (189,000)      
Church's Chicken [Member] | Augusta, GA 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 196,000      
Buildings, Fixtures and Improvements 458,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 654,000      
Accumulated Depreciation (145,000)      
Church's Chicken [Member] | Charleston, 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 421,000      
Buildings, Fixtures and Improvements 344,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 765,000      
Accumulated Depreciation (109,000)      
Church's Chicken [Member] | Charleston, SC 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 167,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 667,000      
Accumulated Depreciation (53,000)      
Church's Chicken [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 437,000      
Buildings, Fixtures and Improvements 437,000      
Costs Capitalized Subsequent to Acquisition (486,000)      
Gross Amount Carried at December 31, 2019 388,000      
Accumulated Depreciation (13,000)      
Church's Chicken [Member] | Columbia, SC 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 231,000      
Buildings, Fixtures and Improvements 428,000      
Costs Capitalized Subsequent to Acquisition (393,000)      
Gross Amount Carried at December 31, 2019 266,000      
Accumulated Depreciation (12,000)      
Church's Chicken [Member] | Greenville, SC 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 254,000      
Buildings, Fixtures and Improvements 472,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 726,000      
Accumulated Depreciation (150,000)      
Church's Chicken [Member] | Greenville, SC 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 325,000      
Buildings, Fixtures and Improvements 487,000      
Costs Capitalized Subsequent to Acquisition (458,000)      
Gross Amount Carried at December 31, 2019 354,000      
Accumulated Depreciation (15,000)      
Church's Chicken [Member] | North Charleston, 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 302,000      
Buildings, Fixtures and Improvements 302,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 604,000      
Accumulated Depreciation (96,000)      
Church's Chicken [Member] | North Charleston, SC 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 407,000      
Buildings, Fixtures and Improvements 407,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 814,000      
Accumulated Depreciation (129,000)      
Church's Chicken [Member] | Orangeburg, 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 407,000      
Buildings, Fixtures and Improvements 271,000      
Costs Capitalized Subsequent to Acquisition (299,000)      
Gross Amount Carried at December 31, 2019 379,000      
Accumulated Depreciation (12,000)      
Church's Chicken [Member] | Spartanburg, SC 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 350,000      
Buildings, Fixtures and Improvements 525,000      
Costs Capitalized Subsequent to Acquisition (432,000)      
Gross Amount Carried at December 31, 2019 443,000      
Accumulated Depreciation (18,000)      
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] | Augusta, 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 178,000      
Buildings, Fixtures and Improvements 533,000      
Costs Capitalized Subsequent to Acquisition (591,000)      
Gross Amount Carried at December 31, 2019 120,000      
Accumulated Depreciation (9,000)      
Vacant [Member] | L'Anse, 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 382,000      
Buildings, Fixtures and Improvements 1,736,000      
Costs Capitalized Subsequent to Acquisition (1,468,000)      
Gross Amount Carried at December 31, 2019 650,000      
Accumulated Depreciation 0      
Vacant [Member] | Dayton, 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 129,000      
Buildings, Fixtures and Improvements 732,000      
Costs Capitalized Subsequent to Acquisition (786,000)      
Gross Amount Carried at December 31, 2019 75,000      
Accumulated Depreciation 0      
Dairy Queen [Member] | Woodville, 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 98,000      
Buildings, Fixtures and Improvements 65,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 163,000      
Accumulated Depreciation (21,000)      
Denny's [Member] | Scottsdale, 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 736,000      
Buildings, Fixtures and Improvements 491,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,227,000      
Accumulated Depreciation (169,000)      
Fazoli'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 427,000      
Buildings, Fixtures and Improvements 522,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 949,000      
Accumulated Depreciation (166,000)      
Golden Corral [Member] | Dayton, 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 579,000      
Buildings, Fixtures and Improvements 1,429,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,008,000      
Accumulated Depreciation (436,000)      
Golden Corral [Member] | Wichita, 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 560,000      
Buildings, Fixtures and Improvements 1,306,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,866,000      
Accumulated Depreciation (414,000)      
Golden Corral [Member] | Baytown, 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 596,000      
Buildings, Fixtures and Improvements 1,788,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,384,000      
Accumulated Depreciation (567,000)      
Golden Corral [Member] | Akron, 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 640,000      
Buildings, Fixtures and Improvements 2,133,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,773,000      
Accumulated Depreciation (617,000)      
Golden Corral [Member] | San Angelo, 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 644,000      
Buildings, Fixtures and Improvements 1,702,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,346,000      
Accumulated Depreciation (525,000)      
Golden Corral [Member] | Kokomo, 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 780,000      
Buildings, Fixtures and Improvements 2,107,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,887,000      
Accumulated Depreciation (700,000)      
Hardee's [Member] | Jacksonville, 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 875,000      
Buildings, Fixtures and Improvements 583,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,458,000      
Accumulated Depreciation (185,000)      
Hardee's [Member] | Bremen, 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 129,000      
Buildings, Fixtures and Improvements 518,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 647,000      
Accumulated Depreciation (164,000)      
Hardee's [Member] | Akron, 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 207,000      
Buildings, Fixtures and Improvements 483,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 690,000      
Accumulated Depreciation (153,000)      
Hardee's [Member] | Jefferson, 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 242,000      
Buildings, Fixtures and Improvements 363,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 605,000      
Accumulated Depreciation (115,000)      
Hardee's [Member] | Minerva, 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 214,000      
Buildings, Fixtures and Improvements 321,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 535,000      
Accumulated Depreciation (102,000)      
Hardee's [Member] | Seville, 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 151,000      
Buildings, Fixtures and Improvements 454,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 605,000      
Accumulated Depreciation (144,000)      
Hardee's [Member] | Morristown, 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 353,000      
Buildings, Fixtures and Improvements 431,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 784,000      
Accumulated Depreciation (137,000)      
Hardee's [Member] | Springfield, 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 343,000      
Buildings, Fixtures and Improvements 515,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 858,000      
Accumulated Depreciation (163,000)      
America's PowerSports Inc [Member] | Round Rock, 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 1,688,000      
Buildings, Fixtures and Improvements 9,563,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 11,251,000      
Accumulated Depreciation (3,284,000)      
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] | Baytown, 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 698,000      
Buildings, Fixtures and Improvements 1,297,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,995,000      
Accumulated Depreciation (412,000)      
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] | Cleburne, 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 291,000      
Buildings, Fixtures and Improvements 1,647,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,938,000      
Accumulated Depreciation (523,000)      
Jack in the Box [Member] | Missouri 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 451,000      
Buildings, Fixtures and Improvements 837,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,288,000      
Accumulated Depreciation (266,000)      
Jack in the Box [Member] | Orange, 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 270,000      
Buildings, Fixtures and Improvements 1,661,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,931,000      
Accumulated Depreciation (546,000)      
Hooters [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 997,000      
Buildings, Fixtures and Improvements 2,327,000      
Costs Capitalized Subsequent to Acquisition 250,000      
Gross Amount Carried at December 31, 2019 3,574,000      
Accumulated Depreciation (817,000)      
Johnny Carinos [Member] | Midland, 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 998,000      
Buildings, Fixtures and Improvements 2,329,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,327,000      
Accumulated Depreciation (800,000)      
Cork & Pig [Member] | San Angelo, 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 769,000      
Buildings, Fixtures and Improvements 2,306,000      
Costs Capitalized Subsequent to Acquisition 43,000      
Gross Amount Carried at December 31, 2019 3,118,000      
Accumulated Depreciation (798,000)      
Taco Bell/ KFC [Member] | Texarkana, 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 111,000      
Buildings, Fixtures and Improvements 630,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 741,000      
Accumulated Depreciation (200,000)      
Taco Bell/ KFC [Member] | Minden, 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 274,000      
Buildings, Fixtures and Improvements 639,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 913,000      
Accumulated Depreciation (203,000)      
Taco Bell/ KFC [Member] | Shreveport, 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 343,000      
Buildings, Fixtures and Improvements 514,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 857,000      
Accumulated Depreciation (163,000)      
Taco Bell/ KFC [Member] | Shreveport, LA 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 616,000      
Buildings, Fixtures and Improvements 753,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,369,000      
Accumulated Depreciation (239,000)      
Taco Bell/ KFC [Member] | Shreveport, LA 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 427,000      
Buildings, Fixtures and Improvements 522,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 949,000      
Accumulated Depreciation (166,000)      
Taco Bell/ KFC [Member] | Shreveport, LA 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 352,000      
Buildings, Fixtures and Improvements 528,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 880,000      
Accumulated Depreciation (168,000)      
Taco Bell/ KFC [Member] | Mount Pleasant, 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 106,000      
Buildings, Fixtures and Improvements 952,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,058,000      
Accumulated Depreciation (302,000)      
Taco Bell/ KFC [Member] | New Boston, 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 125,000      
Buildings, Fixtures and Improvements 1,127,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,252,000      
Accumulated Depreciation (358,000)      
Taco Bell/ KFC [Member] | Green Bay, WI [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 574,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,044,000      
Accumulated Depreciation (182,000)      
Taco Bell/ KFC [Member] | Dunkirk, 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 800,000      
Buildings, Fixtures and Improvements 978,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,778,000      
Accumulated Depreciation (310,000)      
Taco Bell/ KFC [Member] | Geneva, 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 569,000      
Buildings, Fixtures and Improvements 695,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,264,000      
Accumulated Depreciation (221,000)      
Taco Bell/ KFC [Member] | Canonsburg, 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 176,000      
Buildings, Fixtures and Improvements 1,586,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,762,000      
Accumulated Depreciation (503,000)      
Kentucky Fried Chicken [Member] | Dolton, 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 167,000      
Buildings, Fixtures and Improvements 946,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,113,000      
Accumulated Depreciation (300,000)      
Kentucky Fried Chicken [Member] | Elmhurst, 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 242,000      
Buildings, Fixtures and Improvements 969,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,211,000      
Accumulated Depreciation (307,000)      
Kentucky Fried Chicken [Member] | Hazel Crest, 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 153,000      
Buildings, Fixtures and Improvements 1,376,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,529,000      
Accumulated Depreciation (437,000)      
Kentucky Fried Chicken [Member] | Homewood, 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 660,000      
Buildings, Fixtures and Improvements 1,541,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,201,000      
Accumulated Depreciation (489,000)      
Kentucky Fried Chicken [Member] | Matteson, 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 399,000      
Buildings, Fixtures and Improvements 2,259,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,658,000      
Accumulated Depreciation (717,000)      
Kentucky Fried Chicken [Member] | Mattoon, 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 113,000      
Buildings, Fixtures and Improvements 1,019,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,132,000      
Accumulated Depreciation (323,000)      
Kentucky Fried Chicken [Member] | Oak Forest, 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 185,000      
Buildings, Fixtures and Improvements 1,047,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,232,000      
Accumulated Depreciation (332,000)      
Kentucky Fried Chicken [Member] | Rockford, 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 201,000      
Buildings, Fixtures and Improvements 1,142,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,343,000      
Accumulated Depreciation (362,000)      
Kentucky Fried Chicken [Member] | Springfield, 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 267,000      
Buildings, Fixtures and Improvements 1,068,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,335,000      
Accumulated Depreciation (339,000)      
Kentucky Fried Chicken [Member] | Springfield, IL 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 212,000      
Buildings, Fixtures and Improvements 1,203,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,415,000      
Accumulated Depreciation (382,000)      
Kentucky Fried Chicken [Member] | Westchester, 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 238,000      
Buildings, Fixtures and Improvements 952,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,190,000      
Accumulated Depreciation (302,000)      
Kentucky Fried Chicken [Member] | Crawfordsville, 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 159,000      
Buildings, Fixtures and Improvements 1,068,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,227,000      
Accumulated Depreciation (354,000)      
Kentucky Fried Chicken [Member] | Frankfort, 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 99,000      
Buildings, Fixtures and Improvements 893,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 992,000      
Accumulated Depreciation (283,000)      
Kentucky Fried Chicken [Member] | Lebanon, 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 337,000      
Buildings, Fixtures and Improvements 1,348,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,685,000      
Accumulated Depreciation (428,000)      
Kentucky Fried Chicken [Member] | Green Bay, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 208,000      
Buildings, Fixtures and Improvements 1,022,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,230,000      
Accumulated Depreciation (339,000)      
Taco Bell [Member] | Augusta, 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 220,000      
Buildings, Fixtures and Improvements 1,292,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,512,000      
Accumulated Depreciation (425,000)      
Taco Bell [Member] | Detroit, 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 124,000      
Buildings, Fixtures and Improvements 704,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 828,000      
Accumulated Depreciation (223,000)      
Taco Bell [Member] | Jacksonville, 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 440,000      
Buildings, Fixtures and Improvements 1,167,000      
Costs Capitalized Subsequent to Acquisition (1,020,000)      
Gross Amount Carried at December 31, 2019 587,000      
Accumulated Depreciation 0      
Taco Bell [Member] | Crawfordsville, 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 234,000      
Buildings, Fixtures and Improvements 934,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,168,000      
Accumulated Depreciation (296,000)      
Taco Bell [Member] | Hartford City, 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 99,000      
Buildings, Fixtures and Improvements 889,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 988,000      
Accumulated Depreciation (282,000)      
Taco Bell [Member] | Kokomo, 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 199,000      
Buildings, Fixtures and Improvements 798,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 997,000      
Accumulated Depreciation (253,000)      
Taco Bell [Member] | Lafayette, 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 304,000      
Buildings, Fixtures and Improvements 912,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,216,000      
Accumulated Depreciation (290,000)      
Taco Bell [Member] | Noblesville, 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 363,000      
Buildings, Fixtures and Improvements 545,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 908,000      
Accumulated Depreciation (173,000)      
Taco Bell [Member] | Tipton, 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 104,000      
Buildings, Fixtures and Improvements 936,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,040,000      
Accumulated Depreciation (297,000)      
Taco Bell [Member] | Albertville, 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 419,000      
Buildings, Fixtures and Improvements 778,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,197,000      
Accumulated Depreciation (247,000)      
Taco Bell [Member] | Dora, 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 348,000      
Buildings, Fixtures and Improvements 813,000      
Costs Capitalized Subsequent to Acquisition (797,000)      
Gross Amount Carried at December 31, 2019 364,000      
Accumulated Depreciation 0      
Logan's Roadhouse [Member] | Owasso, 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 1,449,000      
Buildings, Fixtures and Improvements 2,173,000      
Costs Capitalized Subsequent to Acquisition (567,000)      
Gross Amount Carried at December 31, 2019 3,055,000      
Accumulated Depreciation (447,000)      
Long John Silver's / A&W [Member] | Merced, 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 174,000      
Buildings, Fixtures and Improvements 695,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 869,000      
Accumulated Depreciation (221,000)      
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)      
Pizza Hut/WingStreet [Member] | Midland, 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 414,000      
Buildings, Fixtures and Improvements 506,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 920,000      
Accumulated Depreciation (161,000)      
Pizza Hut/WingStreet [Member] | Eatonton, 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 353,000      
Buildings, Fixtures and Improvements 353,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 706,000      
Accumulated Depreciation (112,000)      
Pizza Hut/WingStreet [Member] | Greensboro, 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 569,000      
Buildings, Fixtures and Improvements 465,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,034,000      
Accumulated Depreciation (148,000)      
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] | Norwalk, 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 77,000      
Buildings, Fixtures and Improvements 115,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 192,000      
Accumulated Depreciation (37,000)      
Pizza Hut/WingStreet [Member] | Batesburg, 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 261,000      
Buildings, Fixtures and Improvements 484,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 745,000      
Accumulated Depreciation (154,000)      
Pizza Hut/WingStreet [Member] | Cheraw, 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 415,000      
Buildings, Fixtures and Improvements 507,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 922,000      
Accumulated Depreciation (161,000)      
Pizza Hut/WingStreet [Member] | Edgefield, 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 221,000      
Buildings, Fixtures and Improvements 410,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 631,000      
Accumulated Depreciation (130,000)      
Pizza Hut/WingStreet [Member] | Pageland, 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 344,000      
Buildings, Fixtures and Improvements 420,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 764,000      
Accumulated Depreciation (133,000)      
Pizza Hut/WingStreet [Member] | St. George, 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 367,000      
Buildings, Fixtures and Improvements 245,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 612,000      
Accumulated Depreciation (78,000)      
Pizza Hut/WingStreet [Member] | Saluda, 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 346,000      
Buildings, Fixtures and Improvements 346,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 692,000      
Accumulated Depreciation (110,000)      
Pizza Hut/WingStreet [Member] | Santee, 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 371,000      
Buildings, Fixtures and Improvements 248,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 619,000      
Accumulated Depreciation (79,000)      
Pizza Hut/WingStreet [Member] | West 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 507,000      
Buildings, Fixtures and Improvements 415,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 922,000      
Accumulated Depreciation (132,000)      
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] | Amarillo, 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 254,000      
Buildings, Fixtures and Improvements 1,015,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,269,000      
Accumulated Depreciation (322,000)      
Pizza Hut/WingStreet [Member] | Fort Stockton, 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 252,000      
Buildings, Fixtures and Improvements 1,007,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,259,000      
Accumulated Depreciation (319,000)      
Pizza Hut/WingStreet [Member] | Midland, 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 506,000      
Buildings, Fixtures and Improvements 619,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,125,000      
Accumulated Depreciation (196,000)      
Pizza Hut/WingStreet [Member] | Monahans, 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 361,000      
Buildings, Fixtures and Improvements 671,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,032,000      
Accumulated Depreciation (213,000)      
Pizza Hut/WingStreet [Member] | Odessa, 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 456,000      
Buildings, Fixtures and Improvements 847,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,303,000      
Accumulated Depreciation (269,000)      
Pizza Hut/WingStreet [Member] | Odessa, 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 588,000      
Buildings, Fixtures and Improvements 882,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,470,000      
Accumulated Depreciation (280,000)      
Pizza Hut/WingStreet [Member] | Odessa, 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 572,000      
Buildings, Fixtures and Improvements 572,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,144,000      
Accumulated Depreciation (182,000)      
Pizza Hut/WingStreet [Member] | Odessa, 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 627,000      
Buildings, Fixtures and Improvements 766,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,393,000      
Accumulated Depreciation (243,000)      
Pizza Hut/WingStreet [Member] | Odessa, 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 457,000      
Buildings, Fixtures and Improvements 685,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,142,000      
Accumulated Depreciation (217,000)      
Pizza Hut/WingStreet [Member] | Pecos, 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 387,000      
Buildings, Fixtures and Improvements 719,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,106,000      
Accumulated Depreciation (228,000)      
Pizza Hut/WingStreet [Member] | Ashland, VA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 589,000      
Buildings, Fixtures and Improvements 1,093,000      
Costs Capitalized Subsequent to Acquisition (362,000)      
Gross Amount Carried at December 31, 2019 1,320,000      
Accumulated Depreciation (27,000)      
Pizza Hut/WingStreet [Member] | Bedford, VA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 548,000      
Buildings, Fixtures and Improvements 670,000      
Costs Capitalized Subsequent to Acquisition (271,000)      
Gross Amount Carried at December 31, 2019 947,000      
Accumulated Depreciation (16,000)      
Pizza Hut/WingStreet [Member] | Chester, VA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 473,000      
Buildings, Fixtures and Improvements 1,104,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,577,000      
Accumulated Depreciation (350,000)      
Pizza Hut/WingStreet [Member] | Christiansburg, VA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 494,000      
Buildings, Fixtures and Improvements 918,000      
Costs Capitalized Subsequent to Acquisition (310,000)      
Gross Amount Carried at December 31, 2019 1,102,000      
Accumulated Depreciation (23,000)      
Pizza Hut/WingStreet [Member] | Clifton Forge, VA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 287,000      
Buildings, Fixtures and Improvements 861,000      
Costs Capitalized Subsequent to Acquisition (271,000)      
Gross Amount Carried at December 31, 2019 877,000      
Accumulated Depreciation (22,000)      
Pizza Hut/WingStreet [Member] | Colonial Heights, VA 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 311,000      
Buildings, Fixtures and Improvements 311,000      
Costs Capitalized Subsequent to Acquisition (119,000)      
Gross Amount Carried at December 31, 2019 503,000      
Accumulated Depreciation (8,000)      
Pizza Hut/WingStreet [Member] | Hampton, VA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 641,000      
Buildings, Fixtures and Improvements 345,000      
Costs Capitalized Subsequent to Acquisition (137,000)      
Gross Amount Carried at December 31, 2019 849,000      
Accumulated Depreciation (9,000)      
Pizza Hut/WingStreet [Member] | Hopewell, VA [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 864,000      
Costs Capitalized Subsequent to Acquisition (295,000)      
Gross Amount Carried at December 31, 2019 1,276,000      
Accumulated Depreciation (22,000)      
Pizza Hut/WingStreet [Member] | Newport News, VA 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 394,000      
Buildings, Fixtures and Improvements 591,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 985,000      
Accumulated Depreciation (188,000)      
Pizza Hut/WingStreet [Member] | Newport News, VA 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 394,000      
Buildings, Fixtures and Improvements 591,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 985,000      
Accumulated Depreciation (188,000)      
Pizza Hut/WingStreet [Member] | Petersburg, VA [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 701,000      
Costs Capitalized Subsequent to Acquisition (216,000)      
Gross Amount Carried at December 31, 2019 863,000      
Accumulated Depreciation (18,000)      
Pizza Hut/WingStreet [Member] | Richmond, VA [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 814,000      
Costs Capitalized Subsequent to Acquisition (277,000)      
Gross Amount Carried at December 31, 2019 1,203,000      
Accumulated Depreciation (20,000)      
Pizza Hut/WingStreet [Member] | Richmond, VA 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 311,000      
Buildings, Fixtures and Improvements 311,000      
Costs Capitalized Subsequent to Acquisition (126,000)      
Gross Amount Carried at December 31, 2019 496,000      
Accumulated Depreciation (8,000)      
Popeyes [Member] | Valdosta, 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 240,000      
Buildings, Fixtures and Improvements 599,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 839,000      
Accumulated Depreciation (197,000)      
Popeyes [Member] | Greenville, 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 513,000      
Buildings, Fixtures and Improvements 977,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,490,000      
Accumulated Depreciation (324,000)      
Popeyes [Member] | Grenada, 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 77,000      
Buildings, Fixtures and Improvements 458,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 535,000      
Accumulated Depreciation (144,000)      
Popeyes [Member] | Jacksonville, 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 781,000      
Buildings, Fixtures and Improvements 955,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,736,000      
Accumulated Depreciation (303,000)      
Popeyes [Member] | Miami, 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 220,000      
Buildings, Fixtures and Improvements 330,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 550,000      
Accumulated Depreciation (105,000)      
Popeyes [Member] | Orlando, 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 782,000      
Buildings, Fixtures and Improvements 955,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,737,000      
Accumulated Depreciation (303,000)      
Popeyes [Member] | Lakeland, 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 830,000      
Buildings, Fixtures and Improvements 830,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,660,000      
Accumulated Depreciation (263,000)      
Popeyes [Member] | Eunice, 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 382,000      
Buildings, Fixtures and Improvements 891,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,273,000      
Accumulated Depreciation (283,000)      
Popeyes [Member] | Ferguson, 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 128,000      
Buildings, Fixtures and Improvements 383,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 511,000      
Accumulated Depreciation (122,000)      
Popeyes [Member] | St. Louis, MO 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 288,000      
Buildings, Fixtures and Improvements 431,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 719,000      
Accumulated Depreciation (137,000)      
Popeyes [Member] | Omaha, NE [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 343,000      
Buildings, Fixtures and Improvements 515,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 858,000      
Accumulated Depreciation (163,000)      
Popeyes [Member] | Omaha, NE 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 264,000      
Buildings, Fixtures and Improvements 615,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 879,000      
Accumulated Depreciation (195,000)      
Popeyes [Member] | Nederland, 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 445,000      
Buildings, Fixtures and Improvements 668,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,113,000      
Accumulated Depreciation (212,000)      
Popeyes [Member] | Orange, 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 456,000      
Buildings, Fixtures and Improvements 847,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,303,000      
Accumulated Depreciation (269,000)      
Rally's [Member] | Kokomo, 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 290,000      
Buildings, Fixtures and Improvements 548,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 838,000      
Accumulated Depreciation (180,000)      
Rally's [Member] | Indianapolis, IN 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 1,168,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,168,000      
Accumulated Depreciation 0      
Rally's [Member] | Indianapolis, IN 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 1,168,000      
Buildings, Fixtures and Improvements 0      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,168,000      
Accumulated Depreciation 0      
Sonny's Real Pit BBQ [Member] | Venice, 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 338,000      
Buildings, Fixtures and Improvements 507,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 845,000      
Accumulated Depreciation (174,000)      
TGI Fridays [Member] | Royal Palm Beach, 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 1,530,000      
Buildings, Fixtures and Improvements 1,530,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,060,000      
Accumulated Depreciation (525,000)      
TGI Fridays [Member] | Ann Arbor, 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 547,000      
Buildings, Fixtures and Improvements 1,640,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,187,000      
Accumulated Depreciation (563,000)      
TGI Fridays [Member] | Kentwood, 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 281,000      
Buildings, Fixtures and Improvements 2,533,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,814,000      
Accumulated Depreciation (870,000)      
TGI Fridays [Member] | Novi, 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 1,042,000      
Buildings, Fixtures and Improvements 1,042,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,084,000      
Accumulated Depreciation (358,000)      
Wild Bill's Sports Salon [Member] | Rochester, 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 1,347,000      
Buildings, Fixtures and Improvements 1,102,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,449,000      
Accumulated Depreciation (378,000)      
China Town Buffet [Member] | Bismarck, ND [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,038,000      
Buildings, Fixtures and Improvements 1,928,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,966,000      
Accumulated Depreciation $ (662,000)