Quarterly report pursuant to Section 13 or 15(d)

Accounts Payable and Accrued Expenses (Schedule of accounts payable and accrued expenses) (Details)

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Accounts Payable and Accrued Expenses (Schedule of accounts payable and accrued expenses) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Accounts Payable and Accrued Expenses    
Accounts payable $ 3,425 $ 1,877
Research and development 1,821 1,760
Accrued compensation 1,628 1,496
Other 180 535
Total accounts payable and accrued expenses $ 7,054 $ 5,668