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Accounts Payable and Accrued Expenses and Other Current Liabilities - Schedule of Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accounts payable $ 2,122 $ 2,918
Salaries and other compensation 1,655 1,280
Legal and accounting 1,382 640
Other accruals 818 1,670
Total accounts payable and accrued expenses $ 5,977 $ 6,508