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Inventories, Net and Significant Supplier(s) | 3 Months Ended
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Mar. 31, 2016
Inventory Disclosure [Abstract] |
Inventories, Net and Significant Supplier(s) | Inventories, Net and Significant Supplier Inventories, net were as follows:
(In thousands) | March 31, 2016 |  | December 31, 2015 |
Raw materials | $ | 28,051 |  |  | $ | 29,290 |
Components | 13,694 |  |  | 12,228 |
Work in process | 6,350 |  |  | 5,671 |
Finished goods | 72,889 |  |  | 78,222 |
Reserve for excess and obsolete inventory | (3,292 | ) |  | (3,045 | )
Inventories, net | $ | 117,692 |  |  | $ | 122,366 |
Reserve for Excess and Obsolete Inventory Changes in the reserve for excess and obsolete inventory were as follows:
(In thousands) | Three Months Ended March 31,
2016 |  | 2015
Balance at beginning of period | $ | 3,045 |  |  | $ | 2,539 |
Additions charged to costs and expenses (1) | 693 |  |  | 811 |
Sell through (2) | (211 | ) |  | (406 | )
Write-offs/Foreign exchange effects | (235 | ) |  | (407 | )
Balance at end of period | $ | 3,292 |  |  | $ | 2,537 |
(1) | The additions charged to costs and expenses do not include inventory directly written-off that was scrapped during production totaling $63 thousand and $95 thousand for the three months ended March 31, 2016 and 2015, 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.
Significant Supplier We purchase integrated circuits, components and finished goods from multiple sources. Texas Instruments provided $8.5 million or 10.8%, of total inventory purchases during the three months ended March 31, 2016. Victory Chemical Co., Ltd. provided $8.2 million or 11.2%, of total inventory purchases during the three months ended March 31, 2015. Related Party Supplier We purchase certain printed circuit board assemblies from a related party supplier. The supplier is considered a related party for financial reporting purposes because our Senior Vice President of Strategic Operations owns 40% of this vendor. Inventory purchases from this supplier were as follows:
| Three Months Ended March 31,
| 2016 |  | 2015
| $ (thousands) |  | % of Total Inventory Purchases |  | $ (thousands) |  | % of Total Inventory Purchases
Related party supplier | $ | 1,612 |  |  | 2.0 | % |  | $ | 2,094 |  |  | 2.9 | %
Total accounts payable to this supplier were as follows:
| March 31, 2016 |  | December 31, 2015
| $ (thousands) |  | % of Accounts Payable |  | $ (thousands) |  | % of Accounts Payable
Related party supplier | $ | 1,638 |  |  | 2.1 | % |  | $ | 2,361 |  |  | 2.5 | %
Our payable terms and pricing with this supplier are consistent with the terms offered by other suppliers in the ordinary course of business. The accounting policies that we apply to our transactions with our related party supplier are consistent with those applied in transactions with independent third parties. Corporate management routinely monitors purchases from our related party supplier to ensure these purchases remain consistent with our business objectives.

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- Definition The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a, b, c -Article 5 + Details
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