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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals 3) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Customer | Dec. 31, 2017 USD ($) Customer | Dec. 31, 2016 USD ($)
Concentration Risk [Line Items] |  |  |
Term of product warranty | 1 year |  |
Product warranty expense | $ 3,793 | $ 2,618 | $ 1,750
Research and development costs | 3,127 | $ 1,943 | $ 1,797
Increase lease related assets and liabilities | $ 2,300 |  |
Accounts Receivable | Customer Concentration Risk |  |  |
Concentration Risk [Line Items] |  |  |
Number of customer | Customer | 1 | 1 |
Concentration Risk, Percentage | 16.00% | 12.00% |
Major customer, benchmark description | one customer with a trade account receivable balance greater than 10% of total accounts receivable | one customer with a trade account receivable balance greater than 10% of total accounts receivable |

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