Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Summary (Details)

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Accrued Expenses - Summary (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Accrued expenses    
Accrued accounts payable $ 1,276 $ 4,251
Compensation expense 2,189 2,870
Research and development fees 1,177 1,048
Lease liabilities 881 733
Audit and tax fees 69 522
Other current liabilities 350 520
Total $ 5,942 $ 9,944