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CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Deferred revenue from related parties $ 13,977 $ 17,522
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized 10,000,000 10,000,000
Common stock, issued 8,717,967 8,717,967
Common stock, outstanding 8,717,767 8,717,767
Treasury stock, shares 200 200
Related Parties [Member]    
Notes and interest receivable $ 48,646 $ 51,945
Deferred revenue from related parties 16,301 21,034
Accounts payable and other liabilities to related parties (in dollars) $ 6 $ 3