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COLLABORATION INVENTORIES
 12 Months Ended
Dec. 31, 2023
Classes of current inventories [abstract]  
COLLABORATION INVENTORIES COLLABORATION INVENTORIES
December 31,
2023		December 31,
2022
US$’000US$’000
Raw materials13,155 6,989 
Work-in-process2,990 690 
Finished goods3,288 2,675 
Total collaboration inventories19,433 10,354 

The Company's reserve for inventory was $8.9 million as of December 31, 2023 and $5.3 million as of December 31, 2022. The Company’s reserve for inventory as of December 31, 2023 was primarily related to expired material and certain batches or units of product that did not meet quality specifications that were charged to collaboration cost of sales.