Quarterly report pursuant to Section 13 or 15(d)

Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Details)

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Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Payables And Accruals [Abstract]    
Research and development services $ 469 $ 231
General and administrative services 132 297
Compensation expense 563 1,522
Other 101 177
Accrued and other current liabilities $ 1,265 $ 2,227