Summary of Significant Accounting Principles (Details Textual 2)	12 Months Ended
	Dec. 31, 2017 Customer	Dec. 31, 2016 Customer	Mar. 13, 2013 ft² a Dealer
Summary of Significant Accounting Principles (Textual)
Number of dealers | Dealer			440
Area of facilities covered (in sq ft) | ft²			250,000
Area of land (in acres) | a			47
Leases receivable, term	8 years
Net sales [Member]
Summary of Significant Accounting Principles (Textual)
Concentration risk, percentage	98.00%	91.00%
Number of customers | Customer	1	1