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INCOME TAXES (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
Balance at beginning of year | $ (36,392) | $ (29,655) | $ (26,311)
Changes due to amendments to tax laws and exchange rate differences | (2,929) | (2,055) | 1,393
Adjustment previous year loss |  | (735) |
Additions during the year | (3,620) | (3,947) | (4,737)
Balance at end of year | $ (42,941) | $ (36,392) | $ (29,655)

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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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