Nature of Business and Basis of Presentation - Narrative (Details) $ in Millions		3 Months Ended
	Apr. 23, 2020 USD ($)	Mar. 31, 2020 segment
Concentration Risk [Line Items]
Number of operating segments		1
Number of reportable segments		1
Amended And Restated Credit Agreement | Subsequent Event | PPP under CARES Act
Concentration Risk [Line Items]
Debt instrument, covenant, debt amount, maximum | $	$ 6.0
Minimum | Line of credit | Amended And Restated Credit Agreement | Secured debt | Subsequent Event | PPP under CARES Act | LIBOR
Concentration Risk [Line Items]
Basis spread on variable rate	1.00%
Minimum | Line of credit | Amended And Restated Credit Agreement | Secured debt | Subsequent Event | PPP under CARES Act | Base Rate
Concentration Risk [Line Items]
Basis spread on variable rate	2.00%
Customer concentration risk | Direct Company Sales | General Motors Company
Concentration Risk [Line Items]
Concentration risk (percentage)		9.00%
Labor force concentration risk | Workforce Subject to Collective Bargaining Arrangements | Collective Bargaining Arrangements Expiring August 2022
Concentration Risk [Line Items]
Concentration risk (percentage)		40.00%
Labor force concentration risk | Workforce Subject to Collective Bargaining Arrangements | Collective Bargaining Arrangements Expiring February 2023
Concentration Risk [Line Items]
Concentration risk (percentage)		6.00%