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Schedule III - Real Estate and Accumulated Depreciation Section 10 (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)
Taco Bell [Member] | Warrior, 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 364,000      
Buildings, Fixtures and Improvements 675,000      
Costs Capitalized Subsequent to Acquisition (701,000)      
Gross Amount Carried at December 31, 2019 338,000      
Accumulated Depreciation 0      
Taco Bell [Member] | Winfield, 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 278,000      
Buildings, Fixtures and Improvements 834,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,112,000      
Accumulated Depreciation (265,000)      
Taco Bell [Member] | Suisun City, CA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 355,000      
Buildings, Fixtures and Improvements 1,419,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,774,000      
Accumulated Depreciation (450,000)      
Taco Bell [Member] | Marion, 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 496,000      
Buildings, Fixtures and Improvements 921,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,417,000      
Accumulated Depreciation (292,000)      
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      
Vacant [Member] | Auburn, 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 1,111,000      
Buildings, Fixtures and Improvements 933,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,044,000      
Accumulated Depreciation (313,000)      
Qdoba Mexican Grill [Member] | Hutchinson, 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 561,000      
Buildings, Fixtures and Improvements 841,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,402,000      
Accumulated Depreciation (267,000)      
Taco Bueno [Member] | Arlington, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 597,000      
Buildings, Fixtures and Improvements 895,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,492,000      
Accumulated Depreciation (284,000)      
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] | Waco, 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 595,000      
Buildings, Fixtures and Improvements 892,000      
Costs Capitalized Subsequent to Acquisition (842,000)      
Gross Amount Carried at December 31, 2019 645,000      
Accumulated Depreciation (16,000)      
Burger King [Member] | Germantown, 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 644,000      
Buildings, Fixtures and Improvements 1,300,000      
Costs Capitalized Subsequent to Acquisition 200,000      
Gross Amount Carried at December 31, 2019 2,144,000      
Accumulated Depreciation (431,000)      
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] | Roseburg, OR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 350,000      
Buildings, Fixtures and Improvements 886,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,236,000      
Accumulated Depreciation (291,000)      
Burger King [Member] | Metairie, 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 728,000      
Buildings, Fixtures and Improvements 392,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,120,000      
Accumulated Depreciation (124,000)      
TitleMax [Member] | Gainesville, 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 221,000      
Buildings, Fixtures and Improvements 270,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 491,000      
Accumulated Depreciation (93,000)      
Tumbleweed [Member] | Terre Haute, 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 434,000      
Buildings, Fixtures and Improvements 1,303,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,737,000      
Accumulated Depreciation (448,000)      
Tumbleweed [Member] | Louisville, 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 468,000      
Buildings, Fixtures and Improvements 1,404,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,872,000      
Accumulated Depreciation (482,000)      
Tumbleweed [Member] | Mayesville, 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 353,000      
Buildings, Fixtures and Improvements 823,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,176,000      
Accumulated Depreciation (283,000)      
Tumbleweed [Member] | Owensboro, 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 355,000      
Buildings, Fixtures and Improvements 1,420,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,775,000      
Accumulated Depreciation (488,000)      
Tumbleweed [Member] | Bellefontaine, 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 234,000      
Buildings, Fixtures and Improvements 938,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,172,000      
Accumulated Depreciation (322,000)      
Tumbleweed [Member] | Springfield, 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 549,000      
Buildings, Fixtures and Improvements 1,280,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,829,000      
Accumulated Depreciation (440,000)      
Tumbleweed [Member] | Wooster, 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 342,000      
Buildings, Fixtures and Improvements 799,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,141,000      
Accumulated Depreciation (274,000)      
Tumbleweed [Member] | Zanesville, 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 639,000      
Buildings, Fixtures and Improvements 1,491,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,130,000      
Accumulated Depreciation (512,000)      
Wendy's [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 723,000      
Buildings, Fixtures and Improvements 1,343,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,066,000      
Accumulated Depreciation (426,000)      
Wendy's [Member] | Arlington, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,322,000      
Buildings, Fixtures and Improvements 1,546,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,868,000      
Accumulated Depreciation (513,000)      
Wendy's [Member] | Louisville, 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 834,000      
Buildings, Fixtures and Improvements 1,379,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,213,000      
Accumulated Depreciation (457,000)      
Wendy's [Member] | Auburn, 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 718,000      
Buildings, Fixtures and Improvements 1,333,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 2,052,000      
Accumulated Depreciation (423,000)      
Wendy's [Member] | Fayetteville, AR 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 463,000      
Buildings, Fixtures and Improvements 463,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 926,000      
Accumulated Depreciation (147,000)      
Wendy's [Member] | Little Rock, AR 6 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 532,000      
Buildings, Fixtures and Improvements 650,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,182,000      
Accumulated Depreciation (206,000)      
Wendy's [Member] | Orange, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,343,000      
Buildings, Fixtures and Improvements 1,641,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,984,000      
Accumulated Depreciation (521,000)      
Wendy's [Member] | Lake Wales, 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 975,000      
Buildings, Fixtures and Improvements 1,462,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,437,000      
Accumulated Depreciation (464,000)      
Wendy's [Member] | Merritt Island, 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 589,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,309,000      
Accumulated Depreciation (187,000)      
Wendy's [Member] | Ormond Beach, 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 503,000      
Buildings, Fixtures and Improvements 503,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,006,000      
Accumulated Depreciation (160,000)      
Wendy's [Member] | Titusville, 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 414,000      
Buildings, Fixtures and Improvements 770,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,184,000      
Accumulated Depreciation (244,000)      
Wendy's [Member] | Albany, 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 414,000      
Buildings, Fixtures and Improvements 1,656,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,070,000      
Accumulated Depreciation (525,000)      
Wendy's [Member] | Hogansville, 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 1,359,000      
Costs Capitalized Subsequent to Acquisition (1,081,000)      
Gross Amount Carried at December 31, 2019 518,000      
Accumulated Depreciation (25,000)      
Wendy's [Member] | Morrow, 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 755,000      
Buildings, Fixtures and Improvements 922,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,677,000      
Accumulated Depreciation (293,000)      
Wendy's [Member] | Savannah, 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 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 (229,000)      
Wendy's [Member] | Bourbonnais, 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 346,000      
Buildings, Fixtures and Improvements 1,039,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,385,000      
Accumulated Depreciation (330,000)      
Wendy's [Member] | Joliet, 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 642,000      
Buildings, Fixtures and Improvements 963,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,605,000      
Accumulated Depreciation (306,000)      
Wendy's [Member] | Kankakee, 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 250,000      
Buildings, Fixtures and Improvements 1,419,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,669,000      
Accumulated Depreciation (450,000)      
Wendy's [Member] | Mokena, 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 665,000      
Buildings, Fixtures and Improvements 997,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,662,000      
Accumulated Depreciation (316,000)      
Wendy's [Member] | Anderson, 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 505,000      
Buildings, Fixtures and Improvements 757,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,262,000      
Accumulated Depreciation (240,000)      
Wendy's [Member] | Anderson, IN 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 584,000      
Buildings, Fixtures and Improvements 713,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,297,000      
Accumulated Depreciation (226,000)      
Wendy's [Member] | Connersville, 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 324,000      
Buildings, Fixtures and Improvements 1,298,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,622,000      
Accumulated Depreciation (412,000)      
Wendy's [Member] | Richmond, 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 735,000      
Buildings, Fixtures and Improvements 1,716,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,451,000      
Accumulated Depreciation (544,000)      
Wendy's [Member] | Richmond, 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 661,000      
Buildings, Fixtures and Improvements 992,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,653,000      
Accumulated Depreciation (315,000)      
Wendy's [Member] | Auburn, 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 465,000      
Buildings, Fixtures and Improvements 1,085,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,550,000      
Accumulated Depreciation (344,000)      
Wendy's [Member] | Binghamton, 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 293,000      
Buildings, Fixtures and Improvements 879,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,172,000      
Accumulated Depreciation (279,000)      
Wendy's [Member] | Corning, 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 191,000      
Buildings, Fixtures and Improvements 1,717,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,908,000      
Accumulated Depreciation (545,000)      
Wendy's [Member] | Cortland, 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 635,000      
Buildings, Fixtures and Improvements 952,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,587,000      
Accumulated Depreciation (302,000)      
Wendy's [Member] | Endicott, 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 313,000      
Buildings, Fixtures and Improvements 1,253,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,566,000      
Accumulated Depreciation (398,000)      
Wendy's [Member] | Horseheads, 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 72,000      
Buildings, Fixtures and Improvements 1,369,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,441,000      
Accumulated Depreciation (434,000)      
Wendy's [Member] | Owego, 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 101,000      
Buildings, Fixtures and Improvements 1,915,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,016,000      
Accumulated Depreciation (608,000)      
Wendy's [Member] | Centerville, 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 615,000      
Buildings, Fixtures and Improvements 1,434,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,049,000      
Accumulated Depreciation (455,000)      
Wendy's [Member] | Cincinnati, 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 939,000      
Buildings, Fixtures and Improvements 1,408,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,347,000      
Accumulated Depreciation (447,000)      
Wendy's [Member] | Fairborn, 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 629,000      
Buildings, Fixtures and Improvements 1,468,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,097,000      
Accumulated Depreciation (466,000)      
Wendy's [Member] | Fairborn, OH 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 604,000      
Buildings, Fixtures and Improvements 1,408,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,012,000      
Accumulated Depreciation (447,000)      
Wendy's [Member] | Fairfield, 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 794,000      
Buildings, Fixtures and Improvements 970,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 1,765,000      
Accumulated Depreciation (308,000)      
Wendy's [Member] | Hamilton, OH 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 908,000      
Buildings, Fixtures and Improvements 1,362,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,270,000      
Accumulated Depreciation (432,000)      
Wendy's [Member] | Lancaster, 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 552,000      
Buildings, Fixtures and Improvements 1,025,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,577,000      
Accumulated Depreciation (325,000)      
Wendy's [Member] | Miamisburg, 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 888,000      
Buildings, Fixtures and Improvements 1,086,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,974,000      
Accumulated Depreciation (345,000)      
Wendy's [Member] | Middletown, 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 755,000      
Buildings, Fixtures and Improvements 1,133,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,888,000      
Accumulated Depreciation (359,000)      
Wendy's [Member] | Middletown, OH 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 752,000      
Buildings, Fixtures and Improvements 920,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,672,000      
Accumulated Depreciation (292,000)      
Wendy's [Member] | Middletown, OH 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 494,000      
Buildings, Fixtures and Improvements 1,481,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,975,000      
Accumulated Depreciation (470,000)      
Wendy's [Member] | Saint Bernard, 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 432,000      
Buildings, Fixtures and Improvements 1,009,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,441,000      
Accumulated Depreciation (320,000)      
Wendy's [Member] | Springboro, 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 891,000      
Buildings, Fixtures and Improvements 1,336,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,227,000      
Accumulated Depreciation (424,000)      
Wendy's [Member] | West Carrollton, 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 708,000      
Buildings, Fixtures and Improvements 865,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,573,000      
Accumulated Depreciation (275,000)      
Wendy's [Member] | West Chester, 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 944,000      
Buildings, Fixtures and Improvements 772,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,716,000      
Accumulated Depreciation (245,000)      
Wendy's [Member] | West Chester, OH 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 924,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,540,000      
Accumulated Depreciation (293,000)      
Wendy's [Member] | Wintersville, 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 621,000      
Buildings, Fixtures and Improvements 1,449,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 2,071,000      
Accumulated Depreciation (460,000)      
Wendy's [Member] | Enid, 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 158,000      
Buildings, Fixtures and Improvements 893,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,051,000      
Accumulated Depreciation (284,000)      
Wendy's [Member] | Ponca City, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 529,000      
Buildings, Fixtures and Improvements 983,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,512,000      
Accumulated Depreciation (312,000)      
Wendy's [Member] | Sayre, 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 372,000      
Buildings, Fixtures and Improvements 1,115,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,487,000      
Accumulated Depreciation (354,000)      
Wendy's [Member] | Brentwood, 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 339,000      
Buildings, Fixtures and Improvements 1,356,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,695,000      
Accumulated Depreciation (430,000)      
Wendy's [Member] | Crossville, 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 190,000      
Buildings, Fixtures and Improvements 760,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 950,000      
Accumulated Depreciation (241,000)      
Wendy's [Member] | Manchester, 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 245,000      
Buildings, Fixtures and Improvements 1,390,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,635,000      
Accumulated Depreciation (441,000)      
Wendy's [Member] | Mcminnville, 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 255,000      
Buildings, Fixtures and Improvements 1,443,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,698,000      
Accumulated Depreciation (458,000)      
Wendy's [Member] | Murfreesboro, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 586,000      
Buildings, Fixtures and Improvements 1,088,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,674,000      
Accumulated Depreciation (345,000)      
Wendy's [Member] | Nashville, 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 592,000      
Buildings, Fixtures and Improvements 1,100,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,692,000      
Accumulated Depreciation (349,000)      
Wendy's [Member] | Nashville, TN 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 328,000      
Buildings, Fixtures and Improvements 1,313,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,641,000      
Accumulated Depreciation (417,000)      
Wendy's [Member] | Corpus Christi, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 646,000      
Buildings, Fixtures and Improvements 1,198,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 1,845,000      
Accumulated Depreciation (381,000)      
Wendy's [Member] | El Paso, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 630,000      
Buildings, Fixtures and Improvements 1,889,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,519,000      
Accumulated Depreciation (599,000)      
Wendy's [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 416,000      
Buildings, Fixtures and Improvements 624,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,040,000      
Accumulated Depreciation (198,000)      
Wendy's [Member] | Hillsville, 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 324,000      
Buildings, Fixtures and Improvements 973,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,297,000      
Accumulated Depreciation (309,000)      
Wendy's [Member] | Lebanon, 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 431,000      
Buildings, Fixtures and Improvements 1,006,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,437,000      
Accumulated Depreciation (319,000)      
Wendy's [Member] | Wytheville, 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 598,000      
Buildings, Fixtures and Improvements 897,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,495,000      
Accumulated Depreciation (285,000)      
Wendy's [Member] | Beloit, 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 1,138,000      
Buildings, Fixtures and Improvements 931,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,069,000      
Accumulated Depreciation (295,000)      
Wendy's [Member] | Fitchburg, 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 662,000      
Buildings, Fixtures and Improvements 1,230,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,892,000      
Accumulated Depreciation (390,000)      
Wendy's [Member] | Germantown, 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 419,000      
Buildings, Fixtures and Improvements 1,257,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,676,000      
Accumulated Depreciation (399,000)      
Wendy's [Member] | Greenfield, 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 487,000      
Buildings, Fixtures and Improvements 1,137,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,624,000      
Accumulated Depreciation (361,000)      
Wendy's [Member] | Janesville, 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 647,000      
Buildings, Fixtures and Improvements 971,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,618,000      
Accumulated Depreciation (308,000)      
Wendy's [Member] | Kenosha, 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 322,000      
Buildings, Fixtures and Improvements 1,290,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,612,000      
Accumulated Depreciation (409,000)      
Wendy's [Member] | Kenosha, WI 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 965,000      
Buildings, Fixtures and Improvements 1,447,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,412,000      
Accumulated Depreciation (459,000)      
Wendy's [Member] | Madison, 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 454,000      
Buildings, Fixtures and Improvements 1,362,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,816,000      
Accumulated Depreciation (432,000)      
Wendy's [Member] | Milwaukee, 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 810,000      
Buildings, Fixtures and Improvements 810,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,620,000      
Accumulated Depreciation (257,000)      
Wendy's [Member] | MIlwaukee, WI 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 338,000      
Buildings, Fixtures and Improvements 1,351,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,689,000      
Accumulated Depreciation (429,000)      
Wendy's [Member] | Milwaukee, WI 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 436,000      
Buildings, Fixtures and Improvements 1,015,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 1,452,000      
Accumulated Depreciation (323,000)      
Wendy's [Member] | New Berlin, 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 903,000      
Buildings, Fixtures and Improvements 739,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,642,000      
Accumulated Depreciation (234,000)      
Wendy's [Member] | Oak Creek, 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 577,000      
Buildings, Fixtures and Improvements 1,347,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,924,000      
Accumulated Depreciation (428,000)      
Wendy's [Member] | Sheboygan, 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 676,000      
Buildings, Fixtures and Improvements 1,014,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,690,000      
Accumulated Depreciation (322,000)      
Wendy's [Member] | West Allis, 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 583,000      
Buildings, Fixtures and Improvements 1,083,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,666,000      
Accumulated Depreciation (344,000)      
Wendy's [Member] | Bridgeport, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 273,000      
Buildings, Fixtures and Improvements 818,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,091,000      
Accumulated Depreciation (260,000)      
Wendy's [Member] | Buckhannon, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 157,000      
Buildings, Fixtures and Improvements 890,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,047,000      
Accumulated Depreciation (283,000)      
Wendy's [Member] | Parkersburg, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 295,000      
Buildings, Fixtures and Improvements 885,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,180,000      
Accumulated Depreciation (281,000)      
Wendy's [Member] | Parkersburg, WV 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 1,243,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,554,000      
Accumulated Depreciation (395,000)      
Wendy's [Member] | Parkersburg, WV 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 241,000      
Buildings, Fixtures and Improvements 964,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,205,000      
Accumulated Depreciation (306,000)      
Wendy's [Member] | Saint Marys, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 70,000      
Buildings, Fixtures and Improvements 1,322,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,392,000      
Accumulated Depreciation (419,000)      
Wendy's [Member] | Vienna, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 301,000      
Buildings, Fixtures and Improvements 702,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,003,000      
Accumulated Depreciation (223,000)      
Wendy's [Member] | Baltimore, 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 760,000      
Buildings, Fixtures and Improvements 802,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,562,000      
Accumulated Depreciation (266,000)      
Wendy's [Member] | San Antonio, TX 7 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 788,000      
Buildings, Fixtures and Improvements 45,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 833,000      
Accumulated Depreciation (27,000)      
Wendy's [Member] | Norwich, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 703,000      
Buildings, Fixtures and Improvements 937,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,640,000      
Accumulated Depreciation (311,000)      
Wendy's [Member] | Knoxville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 330,000      
Buildings, Fixtures and Improvements 1,161,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,491,000      
Accumulated Depreciation (382,000)      
Popeyes [Member] | Eatontown, NJ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 651,000      
Buildings, Fixtures and Improvements 796,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,447,000      
Accumulated Depreciation (253,000)      
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)      
Whataburger [Member] | Edna, 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 290,000      
Buildings, Fixtures and Improvements 869,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,159,000      
Accumulated Depreciation (276,000)      
Whataburger [Member] | Lubbock, 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 432,000      
Buildings, Fixtures and Improvements 647,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,079,000      
Accumulated Depreciation (205,000)      
Kentucky Fried Chicken [Member] | Germantown, 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 368,000      
Buildings, Fixtures and Improvements 913,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,281,000      
Accumulated Depreciation (303,000)      
Kentucky Fried Chicken [Member] | Milwaukee, 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 396,000      
Buildings, Fixtures and Improvements 773,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,169,000      
Accumulated Depreciation (256,000)      
Kentucky Fried Chicken [Member] | MIlwaukee, WI 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 281,000      
Buildings, Fixtures and Improvements 795,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,076,000      
Accumulated Depreciation (264,000)      
Kentucky Fried Chicken [Member] | Milwaukee, WI 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 89,000      
Buildings, Fixtures and Improvements 750,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 839,000      
Accumulated Depreciation (249,000)      
Kentucky Fried Chicken [Member] | Warren, 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 426,000      
Buildings, Fixtures and Improvements 640,000      
Costs Capitalized Subsequent to Acquisition (421,000)      
Gross Amount Carried at December 31, 2019 645,000      
Accumulated Depreciation (66,000)      
Kentucky Fried Chicken [Member] | New Kensington, 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 324,000      
Buildings, Fixtures and Improvements 487,000      
Costs Capitalized Subsequent to Acquisition (260,000)      
Gross Amount Carried at December 31, 2019 551,000      
Accumulated Depreciation (57,000)      
Kentucky Fried Chicken [Member] | Las Cruces, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 270,000      
Buildings, Fixtures and Improvements 498,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 768,000      
Accumulated Depreciation (164,000)      
China Wok [Member] | Springfield, 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 753,000      
Buildings, Fixtures and Improvements 753,000      
Costs Capitalized Subsequent to Acquisition (973,000)      
Gross Amount Carried at December 31, 2019 533,000      
Accumulated Depreciation (11,000)      
Torchy's Taco [Member] | Waco, 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 595,000      
Buildings, Fixtures and Improvements 893,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,488,000      
Accumulated Depreciation (283,000)      
Dollar Tree/Family Dollar [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 107,000      
Buildings, Fixtures and Improvements 899,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,006,000      
Accumulated Depreciation (258,000)      
Dollar Tree/Family Dollar [Member] | Waco, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 440,000      
Land 125,000      
Buildings, Fixtures and Improvements 544,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 669,000      
Accumulated Depreciation (161,000)      
Dollar Tree/Family Dollar [Member] | Terre Haute, IN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 394,000      
Land 235,000      
Buildings, Fixtures and Improvements 427,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 662,000      
Accumulated Depreciation (129,000)      
Dollar Tree/Family Dollar [Member] | Ormond Beach, 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 675,000      
Buildings, Fixtures and Improvements 1,152,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,827,000      
Accumulated Depreciation (327,000)      
Dollar Tree/Family Dollar [Member] | Cincinnati, 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 221,000      
Buildings, Fixtures and Improvements 1,055,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,276,000      
Accumulated Depreciation (254,000)      
Dollar Tree/Family Dollar [Member] | Nashville, 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 334,000      
Buildings, Fixtures and Improvements 1,275,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,609,000      
Accumulated Depreciation (312,000)      
Dollar Tree/Family Dollar [Member] | Milwaukee, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 970,000      
Land 161,000      
Buildings, Fixtures and Improvements 1,397,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,558,000      
Accumulated Depreciation (399,000)      
Dollar Tree/Family Dollar [Member] | Warren, 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 170,000      
Buildings, Fixtures and Improvements 681,000      
Costs Capitalized Subsequent to Acquisition (2,000)      
Gross Amount Carried at December 31, 2019 849,000      
Accumulated Depreciation (235,000)      
Dollar Tree/Family Dollar [Member] | Plano, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 468,000      
Buildings, Fixtures and Improvements 869,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,337,000      
Accumulated Depreciation (278,000)      
Dollar Tree/Family Dollar [Member] | Etoile, 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 45,000      
Buildings, Fixtures and Improvements 850,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 895,000      
Accumulated Depreciation (272,000)      
Dollar Tree/Family Dollar [Member] | Avinger, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 40,000      
Buildings, Fixtures and Improvements 761,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 801,000      
Accumulated Depreciation (261,000)      
Dollar Tree/Family Dollar [Member] | San Antonio, TX 7 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 1,143,000      
Land 117,000      
Buildings, Fixtures and Improvements 1,619,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,736,000      
Accumulated Depreciation (467,000)      
Dollar Tree/Family Dollar [Member] | San Benito, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 598,000      
Land 132,000      
Buildings, Fixtures and Improvements 772,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 904,000      
Accumulated Depreciation (226,000)      
Dollar Tree/Family Dollar [Member] | Marble Hill, 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 38,000      
Buildings, Fixtures and Improvements 719,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 757,000      
Accumulated Depreciation (230,000)      
Dollar Tree/Family Dollar [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 152,000      
Buildings, Fixtures and Improvements 863,000      
Costs Capitalized Subsequent to Acquisition 5,000      
Gross Amount Carried at December 31, 2019 1,020,000      
Accumulated Depreciation (277,000)      
Dollar Tree/Family Dollar [Member] | Thorp, 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 90,000      
Buildings, Fixtures and Improvements 810,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 900,000      
Accumulated Depreciation (259,000)      
Dollar Tree/Family Dollar [Member] | Greensburg, 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 80,000      
Buildings, Fixtures and Improvements 718,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 798,000      
Accumulated Depreciation (228,000)      
Dollar Tree/Family Dollar [Member] | Centerville, 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 226,000      
Buildings, Fixtures and Improvements 679,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 905,000      
Accumulated Depreciation (215,000)      
Dollar Tree/Family Dollar [Member] | Lumberton, 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 151,000      
Buildings, Fixtures and Improvements 603,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 754,000      
Accumulated Depreciation (191,000)      
Dollar Tree/Family Dollar [Member] | Jackson, 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 93,000      
Buildings, Fixtures and Improvements 525,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 618,000      
Accumulated Depreciation (167,000)      
Dollar Tree/Family Dollar [Member] | Carlin, NV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 99,000      
Buildings, Fixtures and Improvements 895,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 994,000      
Accumulated Depreciation (284,000)      
Dollar Tree/Family Dollar [Member] | Cold Springs, NV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 217,000      
Buildings, Fixtures and Improvements 869,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,086,000      
Accumulated Depreciation (276,000)      
Dollar Tree/Family Dollar [Member] | Mountain View, WY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 44,000      
Buildings, Fixtures and Improvements 838,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 882,000      
Accumulated Depreciation (266,000)      
Dollar Tree/Family Dollar [Member] | Clarendon, 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 83,000      
Buildings, Fixtures and Improvements 749,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 832,000      
Accumulated Depreciation (238,000)      
Dollar Tree/Family Dollar [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 349,000      
Buildings, Fixtures and Improvements 1,294,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,643,000      
Accumulated Depreciation (283,000)      
Dollar Tree/Family Dollar [Member] | International Falls, 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 32,000      
Buildings, Fixtures and Improvements 608,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 640,000      
Accumulated Depreciation (193,000)      
Dollar Tree/Family Dollar [Member] | Phoenix, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 303,000      
Buildings, Fixtures and Improvements 712,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,015,000      
Accumulated Depreciation (185,000)      
Dollar Tree/Family Dollar [Member] | Phoenix, AZ 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 416,000      
Buildings, Fixtures and Improvements 1,229,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,645,000      
Accumulated Depreciation (270,000)      
Dollar Tree/Family Dollar [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 339,000      
Buildings, Fixtures and Improvements 785,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,124,000      
Accumulated Depreciation (239,000)      
Dollar Tree/Family Dollar [Member] | New Orleans, LA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 1,146,000      
Land 547,000      
Buildings, Fixtures and Improvements 1,252,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,799,000      
Accumulated Depreciation (372,000)      
Dollar Tree/Family Dollar [Member] | Tulsa, 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 220,000      
Buildings, Fixtures and Improvements 878,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,098,000      
Accumulated Depreciation (307,000)      
Dollar Tree/Family Dollar [Member] | Converse, 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 148,000      
Buildings, Fixtures and Improvements 469,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 617,000      
Accumulated Depreciation (141,000)      
Dollar Tree/Family Dollar [Member] | Fort Worth, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 276,000      
Buildings, Fixtures and Improvements 935,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,211,000      
Accumulated Depreciation (176,000)      
DaVita Dialvsis [Member] | Cincinnati, 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 219,000      
Buildings, Fixtures and Improvements 878,000      
Costs Capitalized Subsequent to Acquisition 55,000      
Gross Amount Carried at December 31, 2019 1,152,000      
Accumulated Depreciation (258,000)      
DaVita Dialvsis [Member] | St. Pauls, 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 138,000      
Buildings, Fixtures and Improvements 1,246,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,384,000      
Accumulated Depreciation (343,000)      
DaVita Dialvsis [Member] | New Orleans, 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 511,000      
Buildings, Fixtures and Improvements 2,237,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,748,000      
Accumulated Depreciation (474,000)      
Dollar General [Member] | Waco, 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 192,000      
Buildings, Fixtures and Improvements 767,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 959,000      
Accumulated Depreciation (267,000)      
Dollar General [Member] | Fairfield, 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 131,000      
Buildings, Fixtures and Improvements 1,272,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,403,000      
Accumulated Depreciation (366,000)      
Dollar General [Member] | Ponca City, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 145,000      
Buildings, Fixtures and Improvements 1,161,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,306,000      
Accumulated Depreciation (335,000)      
Dollar General [Member] | Manchester, 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 114,000      
Buildings, Fixtures and Improvements 646,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 760,000      
Accumulated Depreciation (226,000)      
Dollar General [Member] | Mcminnville, 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 120,000      
Buildings, Fixtures and Improvements 679,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 799,000      
Accumulated Depreciation (238,000)      
Dollar General [Member] | Corpus Christi, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 270,000      
Buildings, Fixtures and Improvements 809,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,079,000      
Accumulated Depreciation (274,000)      
Dollar General [Member] | Lubbock, 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 267,000      
Buildings, Fixtures and Improvements 801,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,068,000      
Accumulated Depreciation (278,000)      
Dollar General [Member] | Springfield, 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 378,000      
Buildings, Fixtures and Improvements 702,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,080,000      
Accumulated Depreciation (248,000)      
Dollar General [Member] | Elkview, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 274,000      
Buildings, Fixtures and Improvements 823,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,097,000      
Accumulated Depreciation (263,000)      
Dollar General [Member] | Doolittle, 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 137,000      
Buildings, Fixtures and Improvements 778,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 915,000      
Accumulated Depreciation (249,000)      
Dollar General [Member] | Malden, 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 108,000      
Buildings, Fixtures and Improvements 974,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,082,000      
Accumulated Depreciation (311,000)      
Dollar General [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 153,000      
Buildings, Fixtures and Improvements 866,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,019,000      
Accumulated Depreciation (277,000)      
Dollar General [Member] | Mercedes, 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 215,000      
Buildings, Fixtures and Improvements 859,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,074,000      
Accumulated Depreciation (275,000)      
Dollar General [Member] | Annandale, 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 212,000      
Buildings, Fixtures and Improvements 848,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,060,000      
Accumulated Depreciation (271,000)      
Dollar General [Member] | Avinger, 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 44,000      
Buildings, Fixtures and Improvements 830,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 874,000      
Accumulated Depreciation (265,000)      
Dollar General [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 97,000      
Buildings, Fixtures and Improvements 877,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 974,000      
Accumulated Depreciation (280,000)      
Dollar General [Member] | Boling, 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 92,000      
Buildings, Fixtures and Improvements 831,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 923,000      
Accumulated Depreciation (266,000)      
Dollar General [Member] | Ganado, 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 95,000      
Buildings, Fixtures and Improvements 857,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 952,000      
Accumulated Depreciation (274,000)      
Dollar General [Member] | San Antonio, TX 7 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 333,000      
Buildings, Fixtures and Improvements 776,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,109,000      
Accumulated Depreciation (248,000)      
Dollar General [Member] | South Pekin, 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 104,000      
Buildings, Fixtures and Improvements 933,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,037,000      
Accumulated Depreciation (298,000)      
Dollar General [Member] | Brookeland, 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 93,000      
Buildings, Fixtures and Improvements 840,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 933,000      
Accumulated Depreciation (269,000)      
Dollar General [Member] | Rolla, 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 209,000      
Buildings, Fixtures and Improvements 835,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,044,000      
Accumulated Depreciation (267,000)      
Dollar General [Member] | Mahomet, 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 292,000      
Buildings, Fixtures and Improvements 877,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,169,000      
Accumulated Depreciation (280,000)      
Dollar General [Member] | Pequot Lakes, 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 155,000      
Buildings, Fixtures and Improvements 880,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,035,000      
Accumulated Depreciation (281,000)      
Dollar General [Member] | Savannah, 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 270,000      
Buildings, Fixtures and Improvements 811,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,081,000      
Accumulated Depreciation (259,000)      
Dollar General [Member] | San Benito, 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 202,000      
Buildings, Fixtures and Improvements 807,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,009,000      
Accumulated Depreciation (258,000)      
Dollar General [Member] | Diana, 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 186,000      
Buildings, Fixtures and Improvements 743,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 929,000      
Accumulated Depreciation (238,000)      
Dollar General [Member] | Lubbock, 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 199,000      
Buildings, Fixtures and Improvements 796,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 995,000      
Accumulated Depreciation (254,000)      
Dollar General [Member] | Cedar Falls, 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 96,000      
Buildings, Fixtures and Improvements 862,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 958,000      
Accumulated Depreciation (275,000)      
Dollar General [Member] | Marble Hill, 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 104,000      
Buildings, Fixtures and Improvements 935,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,039,000      
Accumulated Depreciation (323,000)      
Dollar General [Member] | Sand Springs, 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 143,000      
Buildings, Fixtures and Improvements 811,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 954,000      
Accumulated Depreciation (257,000)      
Dollar General [Member] | Sand Springs, OK 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 43,000      
Buildings, Fixtures and Improvements 819,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 862,000      
Accumulated Depreciation (260,000)      
Dollar General [Member] | Sand Springs, OK 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 198,000      
Buildings, Fixtures and Improvements 791,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 989,000      
Accumulated Depreciation (251,000)      
Dollar General [Member] | Staples, 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 150,000      
Buildings, Fixtures and Improvements 848,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 998,000      
Accumulated Depreciation (269,000)      
Dollar General [Member] | Lexington, 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 149,000      
Buildings, Fixtures and Improvements 846,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 995,000      
Accumulated Depreciation (268,000)      
Dollar General [Member] | Milaca, 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 102,000      
Buildings, Fixtures and Improvements 916,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,018,000      
Accumulated Depreciation (290,000)      
Dollar General [Member] | Chelyan, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 273,000      
Buildings, Fixtures and Improvements 1,092,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,365,000      
Accumulated Depreciation (346,000)      
Dollar General [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 413,000      
Buildings, Fixtures and Improvements 1,810,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,223,000      
Accumulated Depreciation (536,000)      
Walgreens [Member] | Beloit, WI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 2,184,000      
Land 721,000      
Buildings, Fixtures and Improvements 3,653,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 4,374,000      
Accumulated Depreciation (1,113,000)      
Walgreens [Member] | Baltimore, 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 1,185,000      
Buildings, Fixtures and Improvements 2,764,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,949,000      
Accumulated Depreciation (943,000)      
Walgreens [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 1,007,000      
Buildings, Fixtures and Improvements 1,869,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,876,000      
Accumulated Depreciation (633,000)      
Walgreens [Member] | Albuquerque, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,173,000      
Buildings, Fixtures and Improvements 2,287,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,460,000      
Accumulated Depreciation (695,000)      
Walgreens [Member] | Tulsa, 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 1,147,000      
Buildings, Fixtures and Improvements 2,904,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 4,051,000      
Accumulated Depreciation (869,000)      
FedEx [Member] | Kankakee, 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 195,000      
Buildings, Fixtures and Improvements 1,103,000      
Costs Capitalized Subsequent to Acquisition 176,000      
Gross Amount Carried at December 31, 2019 1,474,000      
Accumulated Depreciation (484,000)      
FedEx [Member] | Parkersburg, WV [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 193,000      
Buildings, Fixtures and Improvements 3,671,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,864,000      
Accumulated Depreciation (1,431,000)      
FedEx [Member] | Tinicum, 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 0      
Buildings, Fixtures and Improvements 32,180,000      
Costs Capitalized Subsequent to Acquisition 549,000      
Gross Amount Carried at December 31, 2019 32,729,000      
Accumulated Depreciation (11,607,000)      
FedEx [Member] | Lebanon, 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 1,492,000      
Buildings, Fixtures and Improvements 8,452,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 9,944,000      
Accumulated Depreciation (3,190,000)      
FedEx [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 733,000      
Buildings, Fixtures and Improvements 1,361,000      
Costs Capitalized Subsequent to Acquisition 183,000      
Gross Amount Carried at December 31, 2019 2,277,000      
Accumulated Depreciation (523,000)      
FedEx [Member] | Tulsa, 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 458,000      
Buildings, Fixtures and Improvements 8,695,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 9,153,000      
Accumulated Depreciation (3,577,000)      
Mattress Firm [Member] | Oak Creek, 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 906,000      
Buildings, Fixtures and Improvements 3,578,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 4,484,000      
Accumulated Depreciation (276,000)      
Mattress Firm [Member] | Rock Hill, 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 385,000      
Buildings, Fixtures and Improvements 898,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,283,000      
Accumulated Depreciation (287,000)      
Mattress Firm [Member] | Columbus, 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 157,000      
Buildings, Fixtures and Improvements 891,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,048,000      
Accumulated Depreciation (304,000)      
Mattress Firm [Member] | Knoxville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 586,000      
Buildings, Fixtures and Improvements 1,088,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,674,000      
Accumulated Depreciation (360,000)      
Advance Auto Parts [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 470,000      
Buildings, Fixtures and Improvements 1,349,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,819,000      
Accumulated Depreciation (384,000)      
Advance Auto Parts [Member] | Louisville, KY [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 740,000      
Land 336,000      
Buildings, Fixtures and Improvements 1,289,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,625,000      
Accumulated Depreciation (347,000)      
Advance Auto Parts [Member] | Springfield, 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 461,000      
Buildings, Fixtures and Improvements 1,075,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,536,000      
Accumulated Depreciation (364,000)      
Advance Auto Parts [Member] | Albany, GA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 210,000      
Buildings, Fixtures and Improvements 629,000      
Costs Capitalized Subsequent to Acquisition 66,000      
Gross Amount Carried at December 31, 2019 905,000      
Accumulated Depreciation (215,000)      
Advance Auto Parts [Member] | Richmond, 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 377,000      
Buildings, Fixtures and Improvements 1,616,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,993,000      
Accumulated Depreciation (442,000)      
Advance Auto Parts [Member] | Janesville, 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 299,000      
Buildings, Fixtures and Improvements 1,695,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,994,000      
Accumulated Depreciation (468,000)      
Advance Auto Parts [Member] | Kenosha, 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 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 (154,000)      
Advance Auto Parts [Member] | Milwaukee, 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 610,000      
Buildings, Fixtures and Improvements 1,473,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,083,000      
Accumulated Depreciation (405,000)      
Advance Auto Parts [Member] | Lubbock, 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 265,000      
Buildings, Fixtures and Improvements 1,259,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,524,000      
Accumulated Depreciation (341,000)      
Advance Auto Parts [Member] | Warren, 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 83,000      
Buildings, Fixtures and Improvements 745,000      
Costs Capitalized Subsequent to Acquisition (2,000)      
Gross Amount Carried at December 31, 2019 826,000      
Accumulated Depreciation (265,000)      
Advance Auto Parts [Member] | Rock Hill, 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 506,000      
Buildings, Fixtures and Improvements 915,000      
Costs Capitalized Subsequent to Acquisition 45,000      
Gross Amount Carried at December 31, 2019 1,466,000      
Accumulated Depreciation (257,000)      
Advance Auto Parts [Member] | Fort Atkinson, 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 353,000      
Buildings, Fixtures and Improvements 824,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,177,000      
Accumulated Depreciation (263,000)      
Applebee's [Member] | Auburn, 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 1,155,000      
Buildings, Fixtures and Improvements 1,732,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,887,000      
Accumulated Depreciation (595,000)      
Applebee's [Member] | Savannah, 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 1,329,000      
Buildings, Fixtures and Improvements 2,468,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,797,000      
Accumulated Depreciation (848,000)      
Applebee's [Member] | Corpus Christi, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 563,000      
Buildings, Fixtures and Improvements 2,926,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,489,000      
Accumulated Depreciation (980,000)      
Applebee's [Member] | Wytheville, 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 564,000      
Buildings, Fixtures and Improvements 923,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 1,487,000      
Accumulated Depreciation (414,000)      
Applebee's [Member] | Rolla, 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 671,000      
Buildings, Fixtures and Improvements 2,272,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,943,000      
Accumulated Depreciation (735,000)      
Applebee's [Member] | Oxford, 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 1,162,000      
Buildings, Fixtures and Improvements 2,157,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,319,000      
Accumulated Depreciation (711,000)      
Applebee's [Member] | Pueblo, CO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 752,000      
Buildings, Fixtures and Improvements 2,257,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,009,000      
Accumulated Depreciation (769,000)      
Applebee's [Member] | Thornton, CO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 681,000      
Buildings, Fixtures and Improvements 2,043,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,724,000      
Accumulated Depreciation (696,000)      
Applebee's [Member] | Garden City, ID [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 628,000      
Buildings, Fixtures and Improvements 2,512,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,140,000      
Accumulated Depreciation (856,000)      
Applebee's [Member] | Roseburg, OR [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 717,000      
Buildings, Fixtures and Improvements 1,673,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,390,000      
Accumulated Depreciation (570,000)      
Applebee's [Member] | Vancouver, 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 791,000      
Buildings, Fixtures and Improvements 1,846,000      
Costs Capitalized Subsequent to Acquisition 1,000      
Gross Amount Carried at December 31, 2019 2,638,000      
Accumulated Depreciation (629,000)      
Applebee's [Member] | Gresham, 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 853,000      
Buildings, Fixtures and Improvements 2,560,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 3,413,000      
Accumulated Depreciation (872,000)      
Applebee's [Member] | Alamogordo, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 271,000      
Buildings, Fixtures and Improvements 2,438,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,709,000      
Accumulated Depreciation (831,000)      
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)      
Bandana's Bar-B-Q Restaurant [Member] | Fenton, 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 470,000      
Buildings, Fixtures and Improvements 314,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 784,000      
Accumulated Depreciation (107,000)      
Johnny Carinos [Member] | Columbus, 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 809,000      
Buildings, Fixtures and Improvements 1,888,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,697,000      
Accumulated Depreciation (643,000)      
Johnny Carinos [Member] | Muncie, 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 540,000      
Buildings, Fixtures and Improvements 2,160,000      
Costs Capitalized Subsequent to Acquisition 0      
Gross Amount Carried at December 31, 2019 2,700,000      
Accumulated Depreciation (736,000)      
24 Hour Fitness [Member] | Woodlands, 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 2,690,000      
Buildings, Fixtures and Improvements 7,463,000      
Costs Capitalized Subsequent to Acquisition 215,000      
Gross Amount Carried at December 31, 2019 10,368,000      
Accumulated Depreciation (2,861,000)      
Citizens Bank [Member] | Warwick, RI [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,870,000      
Buildings, Fixtures and Improvements 8,828,000      
Costs Capitalized Subsequent to Acquisition 697,000      
Gross Amount Carried at December 31, 2019 11,395,000      
Accumulated Depreciation (2,842,000)      
The UPS Store [Member] | Elizabethtown, 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 1,460,000      
Buildings, Fixtures and Improvements 10,336,000      
Costs Capitalized Subsequent to Acquisition 777,000      
Gross Amount Carried at December 31, 2019 12,573,000      
Accumulated Depreciation (3,648,000)      
First Bank [Member] | Lake Mary, 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 1,230,000      
Buildings, Fixtures and Improvements 1,504,000      
Costs Capitalized Subsequent to Acquisition 4,000      
Gross Amount Carried at December 31, 2019 2,738,000      
Accumulated Depreciation (454,000)      
CVS [Member] | Nashville, 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 203,000      
Buildings, Fixtures and Improvements 1,148,000      
Costs Capitalized Subsequent to Acquisition 82,000      
Gross Amount Carried at December 31, 2019 1,433,000      
Accumulated Depreciation (425,000)      
CVS [Member] | Warren, 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 560,000      
Buildings, Fixtures and Improvements 1,622,000      
Costs Capitalized Subsequent to Acquisition 75,000      
Gross Amount Carried at December 31, 2019 2,257,000      
Accumulated Depreciation (483,000)      
CVS [Member] | Phoenix, AZ [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 5,025,000      
Land 1,511,000      
Buildings, Fixtures and Improvements 4,533,000      
Costs Capitalized Subsequent to Acquisition 4,000      
Gross Amount Carried at December 31, 2019 6,048,000      
Accumulated Depreciation (1,527,000)      
CVS [Member] | Phoenix, AZ 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 3,015,000      
Land 901,000      
Buildings, Fixtures and Improvements 2,704,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 3,620,000      
Accumulated Depreciation (912,000)      
CVS [Member] | Fresno, CA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 5,045,000      
Land 1,890,000      
Buildings, Fixtures and Improvements 4,409,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 6,315,000      
Accumulated Depreciation (1,485,000)      
CVS [Member] | Palmdale, CA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 5,226,000      
Land 2,493,000      
Buildings, Fixtures and Improvements 4,630,000      
Costs Capitalized Subsequent to Acquisition 17,000      
Gross Amount Carried at December 31, 2019 7,140,000      
Accumulated Depreciation (1,560,000)      
CVS [Member] | Sacramento, CA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 4,724,000      
Land 2,163,000      
Buildings, Fixtures and Improvements 4,016,000      
Costs Capitalized Subsequent to Acquisition 19,000      
Gross Amount Carried at December 31, 2019 6,198,000      
Accumulated Depreciation (1,353,000)      
CVS [Member] | Norwich, CT [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 0      
Land 1,998,000      
Buildings, Fixtures and Improvements 5,995,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 8,008,000      
Accumulated Depreciation (2,018,000)      
CVS [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 2,258,000      
Land 587,000      
Buildings, Fixtures and Improvements 2,347,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 2,950,000      
Accumulated Depreciation (792,000)      
CVS [Member] | Mandeville, LA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 4,020,000      
Land 2,385,000      
Buildings, Fixtures and Improvements 2,915,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 5,316,000      
Accumulated Depreciation (983,000)      
CVS [Member] | Metairie, LA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 4,121,000      
Land 1,895,000      
Buildings, Fixtures and Improvements 3,519,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 5,430,000      
Accumulated Depreciation (1,186,000)      
CVS [Member] | New Orleans, LA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 3,719,000      
Land 2,439,000      
Buildings, Fixtures and Improvements 2,439,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 4,894,000      
Accumulated Depreciation (823,000)      
CVS [Member] | Slidell, LA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 4,355,000      
Land 1,142,000      
Buildings, Fixtures and Improvements 4,568,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 5,725,000      
Accumulated Depreciation (1,538,000)      
CVS [Member] | Hingham, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 5,695,000      
Land 1,873,000      
Buildings, Fixtures and Improvements 5,619,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 7,508,000      
Accumulated Depreciation (1,892,000)      
CVS [Member] | Malden, MA [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 5,360,000      
Land 1,757,000      
Buildings, Fixtures and Improvements 5,271,000      
Costs Capitalized Subsequent to Acquisition 14,000      
Gross Amount Carried at December 31, 2019 7,042,000      
Accumulated Depreciation (1,775,000)      
CVS [Member] | St. Joseph, MO [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 3,015,000      
Land 1,022,000      
Buildings, Fixtures and Improvements 3,067,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 4,104,000      
Accumulated Depreciation (1,034,000)      
CVS [Member] | Beaufort, NC [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 2,781,000      
Land 378,000      
Buildings, Fixtures and Improvements 3,404,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 3,797,000      
Accumulated Depreciation (1,147,000)      
CVS [Member] | Albuquerque, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 3,719,000      
Land 975,000      
Buildings, Fixtures and Improvements 3,899,000      
Costs Capitalized Subsequent to Acquisition 17,000      
Gross Amount Carried at December 31, 2019 4,891,000      
Accumulated Depreciation (1,314,000)      
CVS [Member] | Albuquerque, NM 2 [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 3,920,000      
Land 1,029,000      
Buildings, Fixtures and Improvements 4,118,000      
Costs Capitalized Subsequent to Acquisition 17,000      
Gross Amount Carried at December 31, 2019 5,164,000      
Accumulated Depreciation (1,387,000)      
CVS [Member] | Las Cruces, NM [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 4,925,000      
Land 1,295,000      
Buildings, Fixtures and Improvements 5,178,000      
Costs Capitalized Subsequent to Acquisition 17,000      
Gross Amount Carried at December 31, 2019 6,490,000      
Accumulated Depreciation (1,744,000)      
CVS [Member] | Tulsa, OK [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 2,446,000      
Land 950,000      
Buildings, Fixtures and Improvements 2,216,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 3,182,000      
Accumulated Depreciation (748,000)      
CVS [Member] | Jackson, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 3,082,000      
Land 1,209,000      
Buildings, Fixtures and Improvements 2,822,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 4,046,000      
Accumulated Depreciation (951,000)      
CVS [Member] | Knoxville, TN [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 2,613,000      
Land 1,190,000      
Buildings, Fixtures and Improvements 2,210,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 3,415,000      
Accumulated Depreciation (745,000)      
CVS [Member] | Converse, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 3,538,000      
Land 1,390,000      
Buildings, Fixtures and Improvements 3,243,000      
Costs Capitalized Subsequent to Acquisition 16,000      
Gross Amount Carried at December 31, 2019 4,649,000      
Accumulated Depreciation (1,093,000)      
CVS [Member] | Dumas, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 2,312,000      
Land 846,000      
Buildings, Fixtures and Improvements 2,537,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 3,398,000      
Accumulated Depreciation (855,000)      
CVS [Member] | Elsa, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 2,814,000      
Land 915,000      
Buildings, Fixtures and Improvements 2,744,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 3,674,000      
Accumulated Depreciation (925,000)      
CVS [Member] | Fort Worth, TX [Member]        
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]        
Encumbrances at December 31, 2019 4,147,000      
Land 2,453,000      
Buildings, Fixtures and Improvements 3,679,000      
Costs Capitalized Subsequent to Acquisition 15,000      
Gross Amount Carried at December 31, 2019 6,147,000      
Accumulated Depreciation $ (1,239,000)