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Allowances for Credit Losses
 12 Months Ended
Dec. 31, 2022
Accounts Receivable, after Allowance for Credit Loss [Abstract]  
Allowances for Credit Losses Allowance for Credit Losses
The Company does business with most major international pharmaceutical companies. Provision for credit losses at December 31, 2022 and December 31, 2021 comprises:
December 31, 2022December 31, 2021
 (in thousands)
Opening provision$7,081 $7,149 
Amounts used during the year(3,913)(116)
Amounts provided during the year17,800 705 
Amounts released during the year— (544)
Foreign exchange(406)(113)
 
Closing provision
$20,562 $7,081