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Foreign Operations | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Foreign Operations | Foreign Operations In conjunction with the Company's acquisition of certain assets of Airshield Corporation on October 16, 2001, the Company established manufacturing operations in Mexico (under the Maquiladora program). The Mexican operation is a captive manufacturing facility of the Company and the functional currency is United States dollars. Essentially all sales of the Mexican operations are made in United States dollars, which totaled $50,727,000, $49,708,000 and $69,235,000 in 2017, 2016 and 2015, respectively. Expenses are incurred in the United States dollar and the Mexican peso. Expenses incurred in pesos include labor, utilities, supplies and materials, and amounted to approximately 24%, 22% and 19% of sales produced at the Matamoros operations in 2017, 2016 and 2015, respectively. The Company's manufacturing operation in Mexico is subject to various political, economic, and other risks and uncertainties including safety and security concerns inherent to Mexico. Among other risks, the Company's Mexican operations are subject to domestic and international customs and tariffs, changing taxation policies, and governmental regulations. All of the Company's product is sold to U.S. based customers in U.S. dollars. The following table provides information related to sales by country, based on the ship to location of customers' production facilities, for the years ended December 31:
| 2017 |  | 2016 |  | 2015
United States | $ | 103,513,000 |  |  | $ | 119,018,000 |  |  | $ | 129,651,000 |
Mexico | 52,496,000 |  |  | 51,389,000 |  |  | 63,586,000 |
Canada | 5,664,000 |  |  | 4,475,000 |  |  | 5,831,000 |
Total | $ | 161,673,000 |  |  | $ | 174,882,000 |  |  | $ | 199,068,000 |
The following table provides information related to the location of property, plant and equipment, net, as of December 31:
| 2017 |  | 2016
United States | $ | 40,594,000 |  |  | $ | 42,547,000 |
Mexico | 28,037,000 |  |  | 28,054,000 |
Total | $ | 68,631,000 |  |  | $ | 70,601,000 |

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