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Mortgage and Term Loan (Details)
Aug. 03, 2018
USD ($)
payment
Apr. 24, 2018
USD ($)
payment
Jun. 30, 2019
USD ($)
Feb. 28, 2019
USD ($)
May 31, 2017
USD ($)
Debt Instrument [Line Items]          
Debt instrument, face amount       $ 2,000,000 $ 5,000,000
TSI - Donald Ross Realty LLC Mortgage | Mortgage Loan Facility          
Debt Instrument [Line Items]          
Debt instrument, face amount $ 3,150,000        
Debt instrument, stated interest rate 5.36%        
Debt instrument, number of monthly payments | payment 120        
Debt instrument, term 25 years        
Outstanding principal balance, mortgage term note     $ 3,099,000    
Outstanding principal balance, term note     51,000    
Dixie Highway Realty Mortgage          
Debt Instrument [Line Items]          
Minimum required cash balance, operating account   $ 500,000      
Dixie Highway Realty Mortgage | Mortgage Loan Facility          
Debt Instrument [Line Items]          
Debt instrument, face amount   $ 1,880,000      
Debt instrument, stated interest rate   5.46%      
Debt instrument, number of monthly payments | payment   120      
Debt instrument, term   25 years      
Outstanding principal balance, mortgage term note     1,838,000    
Outstanding principal balance, term note     42,000    
Dixie Highway Realty Mortgage | Term Loan          
Debt Instrument [Line Items]          
Debt instrument, face amount   $ 500,000      
Debt instrument, stated interest rate   5.30%      
Debt instrument, number of monthly payments | payment   60      
Outstanding principal balance, mortgage term note     395,000    
Outstanding principal balance, term note     $ 105,000