Schedule III - Real Estate and Accumulated Depreciation (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Cost:      
Balance at End of Year $ 170,194,285    
Encumbrances 30,400,000    
Accumulated Depreciation:      
Balance at End of Year 11,986,949    
Land 78,949,844    
Building & Improvements 77,173,890    
Improvements 13,453,036    
Carrying Costs 617,515    
Land 93,020,395    
Buildings 77,173,890    
Total 170,194,285    
Depreciation 11,986,949    
Real Estate [Member]
      
Cost:      
Balance at Beginning of Year 151,226,811 134,561,058 134,705,516
Additions and Improvements 36,607,950 24,552,841 3,050,496
Adjust to Fair Value       (68,454)
Cost of Real Estate Sold (17,640,476) (7,887,088) (3,126,500)
Balance at End of Year 170,194,285 151,226,811 134,561,058
Accumulated Depreciation:      
Balance at Beginning of Year 11,135,501 10,089,354 9,136,562
Depreciation and Amortization 2,066,386 1,539,990 1,470,947
Depreciation on Real Estate Sold (1,214,938) (493,843) (518,155)
Balance at End of Year 11,986,949 11,135,501 10,089,354
Total 170,194,285 151,226,811 134,561,058
Depreciation 11,986,949 11,135,501 10,089,354
Bank of America, Garden Grove, CA [Member]
      
Cost:      
Balance at End of Year 3,199,978    
Encumbrances 1,840,985    
Accumulated Depreciation:      
Balance at End of Year 39,394    
Land 1,745,447    
Building & Improvements 1,454,531    
Improvements       
Carrying Costs       
Land 1,745,447    
Buildings 1,454,531    
Total 3,199,978    
Depreciation 39,394    
Acquired Dec. 13, 2012    
Life 40 years    
Bank of America, La Habra, CA [Member]
      
Cost:      
Balance at End of Year 2,149,906    
Encumbrances 1,236,866    
Accumulated Depreciation:      
Balance at End of Year 39,404    
Land 571,573    
Building & Improvements 1,578,333    
Improvements       
Carrying Costs       
Land 571,573    
Buildings 1,578,333    
Total 2,149,906    
Depreciation 39,404    
Acquired Dec. 13, 2012    
Life 40 years    
Bank of America Laguna CA [Member]
      
Cost:      
Encumbrances 1,657,646    
Accumulated Depreciation:      
Land 1,231,328    
Building & Improvements 1,649,972    
Improvements       
Carrying Costs       
Bank of America, Los Alamitos, CA [Member]
      
Cost:      
Balance at End of Year 1,603,992    
Encumbrances 922,796    
Accumulated Depreciation:      
Balance at End of Year 20,800    
Land 771,976    
Building & Improvements 832,016    
Improvements       
Carrying Costs       
Land 771,976    
Buildings 832,016    
Total 1,603,992    
Depreciation 20,800    
Acquired Dec. 13, 2012    
Life 40 years    
Bank of America Puerta Real Mission Viejo CA [Member]
      
Cost:      
Encumbrances 734,920    
Accumulated Depreciation:      
Land 523,539    
Building & Improvements 753,890    
Improvements       
Carrying Costs       
Bank of America Trabuca Mission Viejo CA [Member]
      
Cost:      
Encumbrances 1,115,623    
Accumulated Depreciation:      
Land 544,713    
Building & Improvements 1,394,450    
Improvements       
Carrying Costs       
Bank of America, Walnut, CA [Member]
      
Cost:      
Balance at End of Year 2,257,160    
Encumbrances 1,298,571    
Accumulated Depreciation:      
Balance at End of Year 30,353    
Land 1,043,050    
Building & Improvements 1,214,110    
Improvements       
Carrying Costs       
Land 1,043,050    
Buildings 1,214,110    
Total 2,257,160    
Depreciation 30,353    
Acquired Jan. 03, 2013    
Life 40 years    
Bank of America, Westminster, CA [Member]
      
Cost:      
Balance at End of Year 3,032,382    
Encumbrances 1,744,565    
Accumulated Depreciation:      
Balance at End of Year 29,290    
Land 1,950,902    
Building & Improvements 1,081,480    
Improvements       
Carrying Costs       
Land 1,950,902    
Buildings 1,081,480    
Total 3,032,382    
Depreciation 29,290    
Acquired Jan. 03, 2013    
Life 40 years    
Bank of America, Yorba Linda, CA [Member]
      
Cost:      
Balance at End of Year 1,743,707    
Encumbrances 1,003,175    
Accumulated Depreciation:      
Balance at End of Year 12,505    
Land 1,245,514    
Building & Improvements 498,193    
Improvements       
Carrying Costs       
Land 1,245,514    
Buildings 498,193    
Total 1,743,707    
Depreciation 12,505    
Acquired Jan. 03, 2013    
Life 40 years    
Barnes & Noble, Daytona Beach, FL [Member]
      
Cost:      
Balance at End of Year 5,601,600    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 1,235,975    
Land 1,798,600    
Building & Improvements 3,803,000    
Improvements       
Carrying Costs       
Land 1,798,600    
Buildings 3,803,000    
Total 5,601,600    
Depreciation 1,235,975    
Acquired Dec. 15, 2005    
Life 40 years    
Best Buy, McDonough, GA [Member]
      
Cost:      
Balance at End of Year 5,772,682    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 587,348    
Land 2,622,682    
Building & Improvements 3,150,000    
Improvements       
Carrying Costs       
Land 2,622,682    
Buildings 3,150,000    
Total 5,772,682    
Depreciation 587,348    
Acquired Jun. 15, 2006    
Life 40 years    
Big Lots, Germantown, MD [Member]
      
Cost:      
Balance at End of Year 4,733,149    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 24,594    
Land 1,781,918    
Building & Improvements 2,951,231    
Improvements       
Carrying Costs       
Land 1,781,918    
Buildings 2,951,231    
Total 4,733,149    
Depreciation 24,594    
Acquired Sep. 13, 2013    
Life 40 years    
Big Lots, Phoenix, AZ [Member]
      
Cost:      
Balance at End of Year 4,765,881    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 69,900    
Land 1,715,717    
Building & Improvements 3,050,164    
Improvements       
Carrying Costs       
Land 1,715,717    
Buildings 3,050,164    
Total 4,765,881    
Depreciation 69,900    
Acquired Jan. 23, 2013    
Life 40 years    
Buffalo Wild Wings, Phoenix, AZ [Member]
      
Cost:      
Balance at End of Year 1,716,834    
Encumbrances 987,715    
Accumulated Depreciation:      
Balance at End of Year       
Land 1,716,834    
Building & Improvements       
Improvements       
Carrying Costs       
Land 1,716,834    
Buildings       
Total 1,716,834    
Depreciation       
Acquired Sep. 30, 2012    
CVS, Clermont, FL [Member]
      
Cost:      
Balance at End of Year 2,946,808    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 404,300    
Land 1,493,985    
Building & Improvements 1,452,823    
Improvements       
Carrying Costs       
Land 1,493,985    
Buildings 1,452,823    
Total 2,946,808    
Depreciation 404,300    
Acquired Nov. 22, 2002    
Life 40 years    
CVS, Melbourne, FL [Member]
      
Cost:      
Balance at End of Year 2,486,974    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 248,946    
Land 1,567,788    
Building & Improvements 919,186    
Improvements       
Carrying Costs       
Land 1,567,788    
Buildings 919,186    
Total 2,486,974    
Depreciation 248,946    
Acquired Mar. 05, 2003    
Life 40 years    
CVS, Sanford, FL [Member]
      
Cost:      
Balance at End of Year 3,455,847    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 575,079    
Land 1,565,176    
Building & Improvements 1,890,671    
Improvements       
Carrying Costs       
Land 1,565,176    
Buildings 1,890,671    
Total 3,455,847    
Depreciation 575,079    
Acquired Nov. 15, 2001    
Life 40 years    
CVS, Sanford, FL [Member]
      
Cost:      
Balance at End of Year 3,621,319    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 320,270    
Land 2,345,694    
Building & Improvements 1,275,625    
Improvements       
Carrying Costs       
Land 2,345,694    
Buildings 1,275,625    
Total 3,621,319    
Depreciation 320,270    
Acquired Sep. 17, 2003    
Life 40 years    
CVS, Sebastian, FL [Member]
      
Cost:      
Balance at End of Year 3,494,704    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 312,292    
Land 2,205,709    
Building & Improvements 1,288,995    
Improvements       
Carrying Costs       
Land 2,205,709    
Buildings 1,288,995    
Total 3,494,704    
Depreciation 312,292    
Acquired Apr. 23, 2004    
Life 40 years    
CVS, Sebring, FL [Member]
      
Cost:      
Balance at End of Year 3,035,031    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 470,115    
Land 1,312,472    
Building & Improvements 1,722,559    
Improvements       
Carrying Costs       
Land 1,312,472    
Buildings 1,722,559    
Total 3,035,031    
Depreciation 470,115    
Acquired Feb. 04, 2003    
Life 40 years    
CVS, Tallahassee, FL [Member]
      
Cost:      
Balance at End of Year 3,671,678    
Encumbrances 2,112,360    
Accumulated Depreciation:      
Balance at End of Year 564,654    
Land 590,800    
Building & Improvements 1,595,000    
Improvements 1,485,878    
Carrying Costs       
Land 2,076,678    
Buildings 1,595,000    
Total 3,671,678    
Depreciation 564,654    
Acquired Dec. 13, 2000    
Life 40 years    
CVS, Vero Beach, FL [Member]
      
Cost:      
Balance at End of Year 4,425,896    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 281,584    
Land 3,113,661    
Building & Improvements 1,312,235    
Improvements       
Carrying Costs       
Land 3,113,661    
Buildings 1,312,235    
Total 4,425,896    
Depreciation 281,584    
Acquired Jun. 02, 2005    
Life 40 years    
Dick's Sporting Goods, McDonough, GA [Member]
      
Cost:      
Balance at End of Year 8,659,022    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 905,621    
Land 3,934,022    
Building & Improvements 4,725,000    
Improvements       
Carrying Costs       
Land 3,934,022    
Buildings 4,725,000    
Total 8,659,022    
Depreciation 905,621    
Acquired Jun. 15, 2006    
Life 40 years    
Harris Teeter Supermarket, Charlotte, NC [Member]
      
Cost:      
Balance at End of Year 9,011,175    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 490,093    
Land 5,601,837    
Building & Improvements 3,409,338    
Improvements       
Carrying Costs       
Land 5,601,837    
Buildings 3,409,338    
Total 9,011,175    
Depreciation 490,093    
Acquired Apr. 17, 2008    
Life 40 years    
Hilton Resorts Corporation (Office), Orlando, FL One [Member]
      
Cost:      
Balance at End of Year 9,401,623    
Encumbrances 5,252,926    
Accumulated Depreciation:      
Balance at End of Year 58,108    
Land 2,810,942    
Building & Improvements 6,590,681    
Improvements       
Carrying Costs       
Land 2,810,942    
Buildings 6,590,681    
Total 9,401,623    
Depreciation 58,108    
Acquired Jan. 30, 2013    
Life 40 years    
Hilton Resorts Corporation (Office), Orlando, FL Two [Member]
      
Cost:      
Balance at End of Year 3,663,828    
Encumbrances 2,047,074    
Accumulated Depreciation:      
Balance at End of Year 149,118    
Land 1,210,138    
Building & Improvements 2,453,690    
Improvements       
Carrying Costs       
Land 1,210,138    
Buildings 2,453,690    
Total 3,663,828    
Depreciation 149,118    
Acquired Jan. 30, 2013    
Life 40 years    
JPMorgan Chase Bank, Chicago, IL [Member]
      
Cost:      
Balance at End of Year 3,528,492    
Encumbrances 2,029,983    
Accumulated Depreciation:      
Balance at End of Year       
Land 3,528,492    
Building & Improvements       
Improvements       
Carrying Costs       
Land 3,528,492    
Buildings       
Total 3,528,492    
Depreciation       
Acquired Nov. 30, 2012    
Lowe's Corporation, Lexington, NC [Member]
      
Cost:      
Balance at End of Year 9,597,520    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 1,014,021    
Land 5,048,640    
Building & Improvements 4,548,880    
Improvements       
Carrying Costs       
Land 5,048,640    
Buildings 4,548,880    
Total 9,597,520    
Depreciation 1,014,021    
Acquired Jan. 20, 2005    
Life 40 years    
PNC Bank, Altamonte Springs, FL [Member]
      
Cost:      
Balance at End of Year 3,846,463    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 89,042    
Land 3,435,502    
Building & Improvements 410,961    
Improvements       
Carrying Costs       
Land 3,435,502    
Buildings 410,961    
Total 3,846,463    
Depreciation 89,042    
Acquired May 25, 2005    
Life 40 years    
Rite Aid, Renton, WA [Member]
      
Cost:      
Balance at End of Year 6,184,650    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 43,213    
Land 2,036,235    
Building & Improvements 4,148,415    
Improvements       
Carrying Costs       
Land 2,036,235    
Buildings 4,148,415    
Total 6,184,650    
Depreciation 43,213    
Acquired Jul. 25, 2013    
Life 40 years    
Walgreens, Alpharetta, GA [Member]
      
Cost:      
Balance at End of Year 4,671,783    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 342,752    
Land 3,265,623    
Building & Improvements 1,406,160    
Improvements       
Carrying Costs       
Land 3,265,623    
Buildings 1,406,160    
Total 4,671,783    
Depreciation 342,752    
Acquired Mar. 31, 2004    
Life 40 years    
Walgreens, Apopka, FL [Member]
      
Cost:      
Balance at End of Year 3,744,612    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 330,057    
Land 2,390,532    
Building & Improvements 1,354,080    
Improvements       
Carrying Costs       
Land 2,390,532    
Buildings 1,354,080    
Total 3,744,612    
Depreciation 330,057    
Acquired Mar. 29, 2004    
Life 40 years    
Walgreens, Boulder, CO [Member]
      
Cost:      
Balance at End of Year 6,890,120    
Encumbrances 3,963,967    
Accumulated Depreciation:      
Balance at End of Year 304,139    
Land 3,474,934    
Building & Improvements 3,415,186    
Improvements       
Carrying Costs       
Land 3,474,934    
Buildings 3,415,186    
Total 6,890,120    
Depreciation 304,139    
Acquired Apr. 11, 2012    
Life 40 years    
Walgreens, Clermont, FL [Member]
      
Cost:      
Balance at End of Year 4,291,114    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 993,253    
Land 3,021,665    
Building & Improvements 1,269,449    
Improvements       
Carrying Costs       
Land 3,021,665    
Buildings 1,269,449    
Total 4,291,114    
Depreciation 993,253    
Acquired May 27, 2004    
Life 40 years    
Walgreens, Palm Bay, FL [Member]
      
Cost:      
Balance at End of Year 4,260,000    
Encumbrances 2,450,828    
Accumulated Depreciation:      
Balance at End of Year 149,414    
Land 1,102,640    
Building & Improvements 3,157,360    
Improvements       
Carrying Costs       
Land 1,102,640    
Buildings 3,157,360    
Total 4,260,000    
Depreciation 149,414    
Acquired Feb. 12, 2003    
Life 40 years    
Mason Commerce Center, Daytona Beach, FL [Member]
      
Cost:      
Balance at End of Year 4,182,509    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 831,707    
Land 132,609    
Building & Improvements 2,554,055    
Improvements 1,495,845    
Carrying Costs       
Land 1,628,454    
Buildings 2,554,055    
Total 4,182,509    
Depreciation 831,707    
Construction Sep. 01, 2008    
Life 40 years    
Concierge Office Building, Daytona Beach, FL [Member]
      
Cost:      
Balance at End of Year 3,156,043    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 465,685    
Land 293,872    
Building & Improvements 2,862,171    
Improvements       
Carrying Costs       
Land 293,872    
Buildings 2,862,171    
Total 3,156,043    
Depreciation 465,685    
Construction Jul. 01, 2009    
Life 40 years    
Land, Timber, and Subsurface Interests [Member]
      
Cost:      
Balance at End of Year 15,291,911    
Encumbrances       
Accumulated Depreciation:      
Balance at End of Year 451,052    
Land 4,203,083    
Building & Improvements       
Improvements 10,471,313    
Carrying Costs 617,515    
Land 15,291,911    
Buildings       
Total 15,291,911    
Depreciation 451,052    
Bank of America, Laguna Beach, CA [Member]
      
Cost:      
Balance at End of Year 2,881,300    
Accumulated Depreciation:      
Balance at End of Year 44,687    
Land 1,231,328    
Buildings 1,649,972    
Total 2,881,300    
Depreciation 44,687    
Acquired Dec. 13, 2012    
Life 40 years    
Bank of America, Mission Viejo, CA (Puerta Real) [Member]
      
Cost:      
Balance at End of Year 1,277,429    
Accumulated Depreciation:      
Balance at End of Year 20,418    
Land 523,539    
Buildings 753,890    
Total 1,277,429    
Depreciation 20,418    
Acquired Dec. 13, 2012    
Life 40 years    
Bank of America, Mission Viejo, CA (Trabuco) [Member]
      
Cost:      
Balance at End of Year 1,939,163    
Accumulated Depreciation:      
Balance at End of Year 37,766    
Land 544,713    
Buildings 1,394,450    
Total 1,939,163    
Depreciation $ 37,766    
Acquired Jan. 03, 2013    
Life 40 years