Inventories, Net and Significant Suppliers (Tables)

6 Months Ended

Jun. 30, 2018

Inventories, net were as follows:



(In thousands)	June 30, 2018			December 31, 2017
Raw materials	$	58,263		$	43,638
Components	11,545			16,214
Work in process	5,908			1,847
Finished goods	79,007			105,178
Reserve for excess and obsolete inventory	(7,537		)	(4,288		)
Inventories, net	$	147,186		$	162,589

Changes in the reserve for excess and obsolete inventory were as follows:



(In thousands)	Six Months Ended June 30,
(In thousands)	2018			2017
Balance at beginning of period	$	4,288		$	4,205
Additions charged to costs and expenses ⁽¹⁾	4,564			1,218
Sell through ⁽²⁾	(680		)	(576		)
(Write-offs)/Foreign exchange effects	(635		)	(640		)
Balance at end of period	$	7,537		$	4,207


⁽¹⁾	The additions charged to costs and expenses do not include inventory directly written-off that was scrapped during production totaling $0.5 million and $0.2 million for the six months ended June 30, 2018 and 2017, respectively. These amounts are production waste and are not included in management's reserve for excess and obsolete inventory.


⁽²⁾	These amounts represent the reduction in reserves associated with inventory items that were sold during the period.

Purchases from the following supplier totaled more than 10% of our total inventory purchases:



	Three Months Ended June 30,
	2018				2017
	$ (thousands)		% of Total Inventory Purchases		$ (thousands)		% of Total Inventory Purchases
Texas Instruments ⁽¹⁾	$	—	—	%	$	11,450	11.0	%



	Six Months Ended June 30,
	2018				2017
	$ (thousands)		% of Total Inventory Purchases		$ (thousands)		% of Total Inventory Purchases
Texas Instruments ⁽¹⁾	$	—	—	%	$	20,578	10.7	%


⁽¹⁾	Purchases associated with this supplier did not total more than 10% of our total inventory purchases for the indicated period.