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SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals 4) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Significant Accounting Policies [Line Items]      
Goodwill $ 3,308,000 $ 3,308,000  
Materials and workmanship extension period up to a lifetime    
Research and development costs $ 858,000 $ 663,000 $ 743,000
Accounting change resulted in a beneficial adjustment in 2017 $ 552,000    
Accounts Receivable      
Significant Accounting Policies [Line Items]      
Percentage of domestic shipments made pursuant to floor plan financing 70.00%