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COMMITMENTS AND CONTINGENT LIABILITIES (Narrative) (Details) $ in Thousands | 1 Months Ended | 12 Months Ended | 43 Months Ended
--- | --- | --- | ---
Aug. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Mar. 31, 2019
Number of premises operating leases |  | 3 |  |  |
Term of leases of motor vehicles |  | 3 years |  |  |
Operating leases expense |  | $ 1,766 | $ 1,444 | $ 1,447 |
Indemnification agreement limit as a percentage of shareholders' equity |  | 25.00% |  |  |
Financial compensation sought for past damages plus additional amounts for future lost income and pain and suffering | $ 900 | $ 71 |  |  |
Subsequent Event [Member] |  |  |  |  |
Number of former employees filing lawsuits |  |  |  |  | 4
Other Employees [Member] |  |  |  |  |
Financial compensation sought for past damages plus additional amounts for future lost income and pain and suffering |  | $ 162 |  |  |

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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