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Receivables (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Receivables - current portion    
Accounts receivable - trade $ 7,080 $ 4,879
Refundable value added tax 8,293 18,415
Income Taxes Receivable 8,827 8,418
Accounts and Financing Receivable, after Allowance for Credit Loss 4,709 0
Accounts receivable - other 312 705
Receivables, net current portion $ 29,221 $ 32,417