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Loans Payable and Secured Lines of Credit (Details Textual) - USD ($)
1 Months Ended 9 Months Ended
May 11, 2016
Feb. 09, 2015
Feb. 22, 2017
Sep. 30, 2017
Nov. 08, 2017
Dec. 31, 2016
Long Term Debt Maturity Date   Aug. 08, 2017        
Long-term Line of Credit       $ 0   $ 0
Interest Rate Cap [Member]            
Interest Expense, Debt       $ 3,000    
West Palm Beach Florida Loan [Member]            
Long Term Debt Maturity Date May 11, 2019          
Debt Instrument, Description of Variable Rate Basis LIBOR          
Debt Instrument, Interest Rate, Basis for Effective Rate interest at the 30-day LIBOR plus 230 basis points          
Debt Instrument, Interest Rate, Effective Percentage       3.54%   2.75%
Debt Instrument, Unamortized Premium $ 14,000          
Derivative, Notional Amount $ 9,100,000          
Debt Instrument, Unamortized Discount       $ 6,000    
Maximum [Member]            
Debt Instrument, Interest Rate, Stated Percentage 3.00%          
TPH Borrower [Member]            
Loans Payable to Bank   $ 40,000,000        
Debt Instrument, Description of Variable Rate Basis       The 77 Greenwich Loan bears interest at a rate per annum equal to the greater of (i) the rate published from time to time by the Wall Street Journal as the U.S. Prime Rate plus 1.25% (the Contract Rate) or (ii) 4.50% and requires interest only payments through maturity. The interest rate on the 77 Greenwich Loan was 5.00% as of December 31, 2016 and 5.50% as of June 30, 2017. The Contract Rate will be increased by 1.5% per annum during any period in which TPH Greenwich Borrower does not maintain funds in its deposit accounts with the Agent and the Lender sufficient to make payments then due under the 77 Greenwich Loan documents.    
Percentage Of Loans   9.00%        
TPH Borrower [Member] | West Palm Beach Florida Loan [Member]            
Line of Credit Facility, Maximum Borrowing Capacity $ 12,600,000          
Long-term Line of Credit $ 9,100,000          
TPH Borrower [Member] | Maximum [Member]            
Loans Payable to Bank   $ 50,000,000        
Sterling National Bank [Member]            
Debt Instrument, Description of Variable Rate Basis     100      
Debt Instrument, Interest Rate, Effective Percentage     3.75%      
Line of Credit Facility, Maximum Borrowing Capacity     $ 12,000,000 $ 11,000,000    
Line of Credit Facility, Expiration Date     Feb. 22, 2018 Feb. 22, 2019    
Line of Credit Facility, Remaining Borrowing Capacity       $ 9,100,000 $ 9,100,000  
Secured Debt       2,900,000    
Sterling National Bank [Member] | Line of Credit [Member]            
Secured Debt       $ 14,000