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ACCRUED AND OTHER LIABILITIES - Tenant Improvement Credits (Details) - USD ($)
32 Months Ended
Apr. 22, 2014
Dec. 31, 2016
Jun. 30, 2017
Accrued and other liabilities      
Tenant improvements   $ 398,621 $ 17,901
Katy, Texas | Property | Tenant reimbursement commitment      
Accrued and other liabilities      
Contractual Obligation     $ 0
Tenant improvements   381,000  
Funding for tenant improvements   100,000  
Remaining amount of commitment   $ 551,000  
Katy, Texas | Property | Tenant reimbursement commitment | 2014 Acquisitions      
Accrued and other liabilities      
Liability incurred $ 651,000