OPERATING SEGMENT REPORTING - Market Traders (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Segment Reporting
Revenue	$ 58,680	$ 38,404	$ 34,395	$ 34,752	$ 28,240	$ 25,988	$ 30,647	$ 25,542	$ 166,231	$ 110,417	$ 136,541
Asahi Refining Inc.
Operating Segment Reporting
Revenue									24,639	57,835	134,395
Auramet International LLC
Operating Segment Reporting
Revenue									136,911	50,580
Other
Operating Segment Reporting
Revenue									$ 4,681	$ 2,002	$ 2,146