Summary of Significant Accounting Policies - Summary of Sales by Major Customer (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Concentration Risk [Line Items]
Amount	$ 36,018	$ 31,860	$ 63,356	$ 61,729
Net Sales \| Customer Concentration Risk
Concentration Risk [Line Items]
Percent of Total	100.00%	100.00%	100.00%	100.00%
Caterpillar
Concentration Risk [Line Items]
Amount	$ 3,631	$ 3,986	$ 8,296	$ 8,808
Caterpillar \| Net Sales \| Customer Concentration Risk
Concentration Risk [Line Items]
Percent of Total	10.00%	13.00%	13.00%	14.00%
CEG Distributions PTY Ltd.
Concentration Risk [Line Items]
Amount	$ 1,778	$ 4,091	$ 3,614	$ 6,986
CEG Distributions PTY Ltd. \| Net Sales \| Customer Concentration Risk
Concentration Risk [Line Items]
Percent of Total	5.00%	13.00%	6.00%	11.00%
Other
Concentration Risk [Line Items]
Amount	$ 30,609	$ 23,783	$ 51,446	$ 45,935
Other \| Net Sales \| Customer Concentration Risk
Concentration Risk [Line Items]
Percent of Total	85.00%	74.00%	81.00%	75.00%

ASV HOLDINGS, INC. 10-Q