Accrued Expenses and Other Current Liabilities	6 Months Ended
Accrued Expenses and Other Current Liabilities	Jun. 30, 2025
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued Expenses and Other Current Liabilities	7. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following: (in US$ thousands) June 30, 2025 December 31, 2024 Wages and employee benefits $ 40,070 $ 39,457 Taxes other than income taxes 8,928 6,062 Accrued royalties 29,187 36,111 Accrued freight costs 39,005 33,071 Accrued mining fees 100,753 84,538 Other liabilities 12,796 7,559 Total accrued expenses and other current liabilities $ 230,739 $ 206,798