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Balance Sheet Details (Tables)
 6 Months Ended
Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Other Current Assets and Prepaid Expenses Other Current Assets and Prepaid Expenses consist of (in thousands):
June 30, 2022December 31, 2021
Prepaid clinical and related costs$11,895 $14,853 
VAT receivable397 279 
Australian research and development tax incentive2,875 1,871 
Other1,516 1,122 
Total$16,683 $18,125 
Schedule of Accounts Payable and Accrued Expenses Accounts Payable consist of (in thousands):
June 30, 2022December 31, 2021
Clinical costs$3,807 $3,427 
Legal and audit costs102 72 
Other208 246 
Total$4,117 $3,745 
Accrued expenses consist of (in thousands):
June 30, 2022December 31, 2021
Accrued clinical and related costs$4,974 $6,214 
Accrued legal and audit costs69 96 
Accrued compensation608 674 
Accrued other90 87 
Total$5,741 $7,071 
Schedule of Other Current Liabilities Other Current Liabilities consist of (in thousands):
June 30, 2022December 31, 2021
Lease liabilities$366 $408 
Other178 177 
Total$544 $585