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Major Customers | 12 Months Ended
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Dec. 31, 2018
Revenue, Net [Abstract] |
Major Customers | Major Customers The Company had four major customers during 2018, Navistar, Volvo, PACCAR, and UFP. Major customers are defined as customers whose current year sales individually consist of more than ten percent of total sales during any annual or interim reporting period in the current year. The loss of a significant portion of sales to Navistar, Volvo, PACCAR, or UFP would have a material adverse effect on the business of the Company. The following table presents sales revenue for the above-mentioned customers for the years ended December 31:
| 2018 |  | 2017 |  | 2016
Navistar product sales | $ | 52,347,000 |  |  | $ | 39,609,000 |  |  | $ | 39,756,000 |
Navistar tooling sales | 2,806,000 |  |  | 159,000 |  |  | 1,994,000 |
Total Navistar sales | 55,153,000 |  |  | 39,768,000 |  |  | 41,750,000 |
Volvo product sales | 46,063,000 |  |  | 27,627,000 |  |  | 29,520,000 |
Volvo tooling sales | 97,000 |  |  | 8,089,000 |  |  | 20,450,000 |
Total Volvo sales | 46,160,000 |  |  | 35,716,000 |  |  | 49,970,000 |
PACCAR product sales | 38,027,000 |  |  | 26,481,000 |  |  | 24,235,000 |
PACCAR tooling sales | 6,425,000 |  |  | 2,932,000 |  |  | 3,481,000 |
Total PACCAR sales | 44,452,000 |  |  | 29,413,000 |  |  | 27,716,000 |
UFP product sales | 27,906,000 |  |  | — |  |  | — |
UFP tooling sales | 240,000 |  |  | — |  |  | — |
Total UFP sales | 28,146,000 |  |  | — |  |  | — |
Other product sales | 91,874,000 |  |  | 54,906,000 |  |  | 53,113,000 |
Other tooling sales | 3,700,000 |  |  | 1,870,000 |  |  | 2,333,000 |
Total other sales | 95,574,000 |  |  | 56,776,000 |  |  | 55,446,000 |
Total product sales | 256,217,000 |  |  | 148,623,000 |  |  | 146,624,000 |
Total tooling sales | 13,268,000 |  |  | 13,050,000 |  |  | 28,258,000 |
Total sales | $ | 269,485,000 |  |  | $ | 161,673,000 |  |  | $ | 174,882,000 |

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -URI http://asc.fasb.org/topic&trid=2134479 + Details
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