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Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Accrued Liabilities Current [Abstract]    
Personnel expenses $ 3,980 $ 4,571
Professional fees 437 183
Other 1,194 196
Total $ 5,611 $ 4,950 [1]
[1] The Condensed Consolidated Balance Sheet as of December 31, 2019 has been derived from the audited financial statements as of that date.