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Accrued and Other Current Liabilities
 6 Months Ended
Jun. 30, 2020
Payables and Accruals [Abstract]  
Accrued and Other Current Liabilities Accrued and Other Current Liabilities
The following table provides details of accrued and other current liabilities (in thousands):
June 30, 2020December 31, 2019
Accrued clinical trial expenses$11,335  $18,666  
Accrued compensation7,229  7,179  
Accrued milestone payment15,000  —  
Other accrued liabilities6,576  4,074  
Common stock warrant liabilities36  198  
Total accrued and other current liabilities$40,176  $30,117