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SIGNIFICANT ACCOUNTING POLICIES - Analysis of warranty accruals (Details 1) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] |  |
Balance at beginning of year | $ 5,373 | $ 4,629
Less: Payments made during the year | (3,944) | (2,599)
Add: Warranty provision for the current year | 3,901 | 3,436
Changes to warranty provision for prior years | 277 | (93)
Balance at end of year | $ 5,607 | $ 5,373

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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