XML 35 R40.htm IDEA: XBRL DOCUMENT v3.20.1
Notes Payable - Additional Information (Details)
12 Months Ended
Oct. 01, 2018
USD ($)
extension_option
Dec. 31, 2019
USD ($)
property
loan_outstanding
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]      
Number of term loans outstanding | loan_outstanding   4  
Outstanding balance   $ 306,793,000 $ 310,686,000
Number of real estate properties | property   39  
Initial term of debt instrument   2 years  
Debt instrument, extension term   1 year  
Interest expense incurred   $ 13,834,000 11,306,000
Interest expense payable   $ 516,000 421,000
Secured Debt | Richardson Heights, Cooper Street, Bent Tree Green And Mitchelldale Property Loans      
Debt Instrument [Line Items]      
Amortization term   27 years  
Outstanding balance   $ 43,393,000 44,584,000
Hartman SPE LLC | Notes Payable to Banks      
Debt Instrument [Line Items]      
Debt instrument, face amount $ 259,000,000    
Term of debt instrument 5 years    
Initial term of debt instrument 2 years    
Number of extensions | extension_option 3    
Debt instrument, extension term 1 year    
Hartman SPE LLC | LIBOR | Notes Payable to Banks      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.80%    
Maximum | Hartman SPE LLC | LIBOR | Notes Payable to Banks      
Debt Instrument [Line Items]      
Basis spread on variable rate 3.75%    
Fair Value      
Debt Instrument [Line Items]      
Debt instrument, fair value disclosure   308,671,000 309,545,000
Book Value      
Debt Instrument [Line Items]      
Debt instrument, fair value disclosure   $ 306,793,000 $ 310,686,000