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Note 18 - Financial Instruments - Estimated of Fair Values for Other Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Other receivables $ 12,088 $ 10,136
Other receivables, fair value 12,088 10,136
Advisor loans receivable 46,661 44,978
Advisor loans receivable (non-current) 46,661 44,978
Long-term debt - non-current (note 10) 670,289 247,467
Long-term debt, fair value $ 670,289 $ 247,467