Inventories, Net and Significant Suppliers (Tables)

3 Months Ended

Mar. 31, 2018

Inventories, net were as follows:



(In thousands)	March 31, 2018			December 31, 2017
Raw materials	$	46,886		$	43,638
Components	11,972			16,214
Work in process	252			1,847
Finished goods	84,526			105,178
Reserve for excess and obsolete inventory	(4,228		)	(4,288		)
Inventories, net	$	139,408		$	162,589

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



(In thousands)	Three Months Ended March 31,
(In thousands)	2018			2017
Balance at beginning of period	$	4,288		$	4,205
Additions charged to costs and expenses ⁽¹⁾	643			632
Sell through ⁽²⁾	(315		)	(354		)
(Write-offs)/Foreign exchange effects	(388		)	(274		)
Balance at end of period	$	4,228		$	4,209


⁽¹⁾	The additions charged to costs and expenses do not include inventory directly written-off that was scrapped during production totaling $113 thousand and $27 thousand for the three months ended March 31, 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 March 31,
	2018				2017
	$ (thousands)		% of Total Inventory Purchases		$ (thousands)		% of Total Inventory Purchases
Texas Instruments ⁽¹⁾	$	—	—	%	$	9,128	10.4	%


⁽¹⁾	Purchases associated with this supplier did not total more than 10% of our total inventory purchases for the three months ended March 31, 2018.

Inventory purchases from this supplier were as follows:



	Three Months Ended March 31,
	2018				2017
	$ (thousands)		% of Total Inventory Purchases		$ (thousands)		% of Total Inventory Purchases
Related party supplier	$	1,117	1.2	%	$	946	1.1	%

Total accounts payable to this supplier were as follows: