Annual report pursuant to Section 13 and 15(d)

Accounts Payable and Accrued Expenses (Details)

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Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Accounts Payable and Accrued Expenses    
Accounts payable $ 3,079 $ 9,750
Accrued compensation 414 439
Research and development 3,496 1,751
Other 268 377
Accounts payable and accrued expenses - related party 862 776
Total accounts payable and accrued expenses $ 8,119 $ 13,093