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Accrued and Other Current Liabilities
 3 Months Ended
Mar. 31, 2019
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):

March 31,
2019		December 31,
2018
Accrued clinical trial expenses$10,120 $10,621 
Accrued compensation3,735 5,277 
Other accrued liabilities4,093 1,845 
Common stock warrant liabilities646 343 
Total accrued and other current liabilities$18,594 $18,086