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Accounts Payable and Accrued Expenses (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Payables and Accruals [Abstract]    
Accounts Payable $ 6,782,000 $ 8,634,000
Accrued Expenses 1,941,000 2,238,000
Accounts Payable and Accrued Expenses $ 8,723,000 $ 10,872,000