Basis of Presentation (Details) - Dorman Industries [Member] - USD ($)	3 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Basis of Presentation and Business [Line Items]
Sale Of Post Split Shares	445,258	955,883	523,867	394,506	733,300	361,766	1,500,000	375,000	500,000
Sale Of Post Split Shares Value	$ 14,177	$ 21,262	$ 18,635	$ 15,780	$ 21,803	$ 10,853	$ 15,000	$ 15,000	$ 15,000