MARKETABLE SECURITIES AND ACCRUED INTEREST (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Amortized cost	$ 19,634	$ 27,606
Unrealized gains	0	10
Unrealized losses	(32)	(54)
Fair Value	19,602	27,562
Corporate Bonds [Member] \| Maturing within one year [Member]
Amortized cost	19,463	6,883
Unrealized gains	0	0
Unrealized losses	(32)	(9)
Fair Value	19,431	6,874
Corporate Bonds [Member] \| Maturing Between One To Two Years [Member]
Amortized cost		20,510
Unrealized gains		10
Unrealized losses		(45)
Fair Value		20,475
Accrued interest [Member]
Amortized cost	171	213
Unrealized gains	0	0
Unrealized losses	0	0
Fair Value	$ 171	$ 213

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

No definition available.

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

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- Definition

Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ 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

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- Definition

Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

+ 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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