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Accrued Expenses and Other Current Liabilities (Tables)
 12 Months Ended
Dec. 31, 2023
Accrued Expenses and Other Current Liabilities [Abstract]  
Schedule of Other Accrued Expenses and Other Current Liabilities Other accrued expenses and other current liabilities consisted of the following (in thousands):
   As of December 31, 
   2023   2022 
Payroll and related costs  $762   $8,748 
Accrued contract termination costs   
—
    4,700 
Research and development expenses   
—
    978 
Professional fees   489    415 
Operating lease liabilities   1,473    1,390 
Prepaid royalty   
—
    1,011 
Other accrued expenses and current liabilities   409    1,604 
Accrued expenses and other current liabilities  $3,133   $18,846