Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventories as of June 30, 2018 and December 31, 2017 consist of the following (in thousands):


	June 30, 2018			December 31, 2017
Finished goods	$	10,953		$	13,737
Semi-finished goods and work-in-process		35,862			53,148
Raw materials		14,502			12,445
Materials in-transit		838			134
Less: inventory reserve		(4,699	)		(6,391	)

Inventories, net	$	57,456		$	73,073

Changes in inventory reserve for the three and six months ended June 30, 2018 and 2017 are as follows (in thousands):


	Three Months Ended			Six Months Ended			Three Months Ended			Six Months Ended
	June 30, 2018						June 30, 2017
Beginning balance	$	(4,672	)	$	(6,391	)	$	(7,966	)	$	(7,177	)
Change in reserve
Inventory reserve charged to costs of sales		(1,504	)		(2,515	)		(1,399	)		(2,286	)
Sale of previously reserved inventory		898			1,118			2,943			3,445

		(606	)		(1,397	)		1,544			1,159
Write off		339			2,863			983			1,150
Translation adjustments		240			226			142			(429	)

Ending balance	$	(4,699	)	$	(4,699	)	$	(5,297	)	$	(5,297	)