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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals 4) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) Customer | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Concentration Risk [Line Items] |  |  |
Term of product warranty | 1 year |  |
Product warranty expense | $ 2,618 | $ 1,750 | $ 3,076
Research and development costs | $ 1,943 | $ 1,797 | $ 1,595
Accounts Receivable | Customer Concentration Risk |  |  |
Concentration Risk [Line Items] |  |  |
Number of customer | Customer | 1 |  |
Concentration Risk, Percentage | 12.00% |  |
Major customer, benchmark description | Only account with a balance greater than 10% of total accounts receivable | No accounts with a balance greater than 10% of total receivables |

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- Definition Identifies or describes the benchmark that serves as the denominator in the calculation of the percentage of concentration risk. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 + Details
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