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MARKETABLE SECURITIES (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 93,301,000 | $ 61,753,000
Unrealized Gains | 36,000 | 1,000
Unrealized Losses | (336,000) | (285,000)
Fair Value | 93,001,000 | 61,469,000
Investments with other than temporary unrealized losses | $ 0 |
Marketable debt security weighted-average remaining maturity | 1 year 5 months |
Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 44,802,000 | 32,996,000
Unrealized Gains | 13,000 | 0
Unrealized Losses | (110,000) | (148,000)
Fair Value | 44,705,000 | 32,848,000
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 48,499,000 | 28,757,000
Unrealized Gains | 23,000 | 1,000
Unrealized Losses | (226,000) | (137,000)
Fair Value | $ 48,296,000 | $ 28,621,000

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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