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Inventories | 6 Months Ended
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Jun. 30, 2016
Inventory Disclosure [Abstract] |
Inventories | Inventories Inventories are valued at the lower of cost or market. Cost is determined by the first-in, first-out (“FIFO”) method. We establish an allowance for excess and obsolete inventories based on product line changes, the feasibility of substituting parts and the need for supply and replacement parts.
| June 30, 2016 |  | December 31, 2015
| (in thousands)
Raw materials | $ | 36,442 |  |  | $ | 33,853 |
Work in process | 2,417 |  |  | 2,522 |
Finished goods | 2,331 |  |  | 2,881 |
| 41,190 |  |  | 39,256 |
Less: Allowance for excess and obsolete inventories | (1,065 | ) |  | (757 | )
Total, net | $ | 40,125 |  |  | $ | 38,499 |
The related changes in the allowance for excess and obsolete inventories account are as follows:
| Three months ended |  | Six months ended
| June 30, 2016 |  | June 30, 2015 |  | June 30, 2016 |  | June 30, 2015
Allowance for excess and obsolete inventories: | (in thousands)
Balance, beginning of period | $ | 894 |  |  | $ | 755 |  |  | $ | 757 |  |  | $ | 714 |
Provisions for excess and obsolete inventories | 171 |  |  | 18 |  |  | 308 |  |  | 59 |
Inventories written off | — |  |  | — |  |  | — |  |  | — |
Balance, end of period | $ | 1,065 |  |  | $ | 773 |  |  | $ | 1,065 |  |  | $ | 773 |

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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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