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v3.19.3

Major Customers (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | $ 74,655,000 | $ 64,676,000 | $ 228,168,000 | $ 196,324,000
Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | 15,260,000 | 15,154,000 | 47,338,000 | 38,982,000
Volvo [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | 11,178,000 | 11,048,000 | 40,413,000 | 33,276,000
Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | 11,697,000 | 11,005,000 | 37,104,000 | 32,368,000
UFP [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | 6,751,000 | 7,452,000 | 22,076,000 | 21,501,000
Revenue from Contract with Customer, Including Assessed Tax | 6,751,000 |  | 22,076,000 |
Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenues | 29,769,000 | 20,017,000 | 81,237,000 | 70,197,000
Product [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 67,511,000 | 62,305,000 | 214,403,000 | 187,243,000
Product [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 15,115,000 | 14,123,000 | 46,411,000 | 37,939,000
Product [Member] | Volvo [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 11,117,000 | 11,037,000 | 40,213,000 | 33,222,000
Product [Member] | Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 11,532,000 | 10,684,000 | 35,779,000 | 25,984,000
Product [Member] | UFP [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 7,212,000 |  | 21,261,000
Product [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 22,996,000 | 19,249,000 | 69,924,000 | 68,837,000
Service [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 7,144,000 | 2,371,000 | 13,765,000 | 9,081,000
Service [Member] | Navistar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 145,000 | 1,031,000 | 927,000 | 1,043,000
Service [Member] | Volvo [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 61,000 | 11,000 | 200,000 | 54,000
Service [Member] | Paccar [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 165,000 | 321,000 | 1,325,000 | 6,384,000
Service [Member] | UFP [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 0 | 240,000 | 0 | 240,000
Service [Member] | Other Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 6,773,000 | $ 768,000 | $ 11,313,000 | $ 1,360,000

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