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Product Line, Geographic, Significant Customer and Concentration of Credit Risk Data
 12 Months Ended
Dec. 31, 2017
Segment Reporting [Abstract]  
Product Line, Geographic, Significant Customer and Concentration of Credit Risk Data
PRODUCT LINE, GEOGRAPHIC, SIGNIFICANT CUSTOMER AND CONCENTRATION OF CREDIT RISK DATA
 
The following table sets forth the various components of net sales by product line as a percentage of total net sales:
 
Years ended December 31,
 
2017
 
2016
Residential homes
 
68
%
 
79
%
Commercial structures
 
32
%
 
21
%
Total
 
100
%
 
100
%

 
All of our long-lived assets are located in the United States. All of our sales based on product shipment destination were within the United States.
 
Sales to customers comprising more than 10% of our total net sales and corresponding accounts receivable concentration information for such customers is summarized below:
 
 
 
Percent of total sales for
years ended December 31,
 
Percent of total accounts
receivable as of December 31,
 
 
2017
 
2016
 
2017
 
2016
Residential Customers
 
 
 
 
 
 
 
 
Customer A
 
*
 
10.7%
 
14.1%
 
*
Customer B
 
*
 
*
 
*
 
11.8%
 
 
 
 
 
 
 
 
 
Commercial Customers
 
 
 
 
 
 
 
 
Customer C
 
*
 
*
 
16.8%
 
*
Customer D
 
*
 
*
 
15.7%
 
*
Customer E
 
*
 
*
 
*
 
27.0%
* Percent was less than 10% of the total.