XML 53 R41.htm IDEA: XBRL DOCUMENT v3.10.0.1
Major Customers (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenue, Major Customer [Line Items]        
Sales Revenue, Goods, Net $ 62,305,000 $ 37,593,000 $ 187,243,000 $ 110,723,000
Contracts Revenue 2,371,000 901,000 9,081,000 11,885,000
Total net sales 64,676,000 38,494,000 196,324,000 122,608,000
Navistar [Member]        
Revenue, Major Customer [Line Items]        
Sales Revenue, Goods, Net 14,123,000 11,319,000 37,939,000 30,495,000
Contracts Revenue 1,031,000 12,000 1,043,000 90,000
Total net sales 15,154,000 11,331,000 38,982,000 30,585,000
Volvo [Member]        
Revenue, Major Customer [Line Items]        
Sales Revenue, Goods, Net 11,037,000 7,261,000 33,222,000 20,044,000
Contracts Revenue 11,000 432,000 54,000 8,011,000
Total net sales 11,048,000 7,693,000 33,276,000 28,055,000
Paccar [Member]        
Revenue, Major Customer [Line Items]        
Sales Revenue, Goods, Net 10,684,000 7,316,000 25,984,000 19,168,000
Contracts Revenue 321,000 50,000 6,384,000 2,932,000
Total net sales 11,005,000 7,366,000 32,368,000 22,100,000
Yamaha [Member]        
Revenue, Major Customer [Line Items]        
Sales Revenue, Goods, Net 7,212,000 0 21,261,000 0
Contracts Revenue 240,000 0 240,000 0
Total net sales 7,452,000 0 21,501,000 0
Other Customers [Member]        
Revenue, Major Customer [Line Items]        
Sales Revenue, Goods, Net 19,249,000 11,697,000 68,837,000 41,016,000
Contracts Revenue 768,000 407,000 1,360,000 852,000
Total net sales $ 20,017,000 $ 12,104,000 $ 70,197,000 $ 41,868,000