Inventories (Tables)

12 Months Ended

Dec. 31, 2023

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories as of December 31, 2023 and 2022 consist of the following (in thousands):

	December 31,
	2023			2022
Finished goods	$	8,432		$	6,799
Semi-finished goods and work-in-process		29,339			40,265
Raw materials		5,543			7,460
Materials in-transit		18			36
Less: inventory reserve		(10,599	)		(14,677	)
Inventories, net	$	32,733		$	39,883

Changes in Inventory Reserve

Changes in inventory reserve for the years ended December 31, 2023, 2022 and 2021 are as follows (in thousands):

	Year Ended December 31,
	2023			2022			2021
Beginning balance	$	(14,677	)	$	(5,730	)	$	(5,901	)
Change in reserve
Inventory reserve charged to costs of sales		(9,360	)		(13,310	)		(7,626	)
Sale of previously reserved inventory		5,528			3,631			5,349
		(3,832	)		(9,679	)		(2,277	)
Write off		7,552			582			1,875
Translation adjustments		358			150			573
Ending balance	$	(10,599	)	$	(14,677	)	$	(5,730	)