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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Prepaid Expense And Other Assets Current [Abstract]    
Clinical trial expenses $ 1,497 $ 725
Insurance premiums 845 589
Other [1] 328 445
Total prepaid expenses and other current assets $ 2,670 $ 1,759
[1] 1Other consists of various prepaid expenses and other current assets, with no individual item accounting for more than 5% at December 31, 2020 and 2019.