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MARKETABLE SECURITIES - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	$ 17,018	$ 26,585
Gross Unrealized losses	(571)	(554)
Gross Unrealized gains	1,007	1,030
Fair Value	17,454	27,061
Marketable debt securities
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	16,070	25,523
Gross Unrealized losses	0	(5)
Gross Unrealized gains	116	83
Fair Value	16,186	25,601
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost Basis	948	1,062
Gross Unrealized losses	(571)	(549)
Gross Unrealized gains	891	947
Fair Value	$ 1,268	$ 1,460

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- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

+ References

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-Publisher FASB
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