Major Customers (Tables)

3 Months Ended

Mar. 31, 2019

Concentration Risks, Types, No Concentration Percentage [Abstract]

Schedule of Major Customers

The following table presents sales revenue for the above-mentioned customers for the three months ended March 31, 2019 and 2018:

	Three Months Ended
	March 31,
	2019		2018
Navistar product sales	$	14,253,000	$	10,951,000
Navistar tooling sales	39,000		—
Total Navistar sales	14,292,000		10,951,000
Volvo product sales	14,515,000		10,197,000
Volvo tooling sales	107,000		—
Total Volvo sales	14,622,000		10,197,000
PACCAR product sales	11,812,000		6,763,000
PACCAR tooling sales	173,000		3,203,000
Total PACCAR sales	11,985,000		9,966,000
Other product sales	30,871,000		31,801,000
Other tooling sales	496,000		131,000
Total other sales	31,367,000		31,932,000
Total product sales	71,451,000		59,712,000
Total tooling sales	815,000		3,334,000
Total sales	$	72,266,000	$	63,046,000