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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale debt securities:
Fair Value		$ 7,665
Municipal Obligations
Available-for-sale debt securities:
Fair Value		1,490
Corporate Obligations
Available-for-sale debt securities:
Fair Value		6,175
Fair value on a recurring basis
Available-for-sale debt securities:
Fair Value		7,665
Trading securities	$ 6,323	5,518
Fair value on a recurring basis | Municipal Obligations
Available-for-sale debt securities:
Fair Value		1,490
Fair value on a recurring basis | Corporate Obligations
Available-for-sale debt securities:
Fair Value		6,175
Fair value on a recurring basis | Quoted prices in active markets for identical assets (Level 1)
Available-for-sale debt securities:
Fair Value		0
Fair value on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Municipal Obligations
Available-for-sale debt securities:
Fair Value		0
Fair value on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Corporate Obligations
Available-for-sale debt securities:
Fair Value		0
Fair value on a recurring basis | Significant other observable inputs (Level 2)
Available-for-sale debt securities:
Fair Value		7,665
Fair value on a recurring basis | Significant other observable inputs (Level 2) | Municipal Obligations
Available-for-sale debt securities:
Fair Value		1,490
Fair value on a recurring basis | Significant other observable inputs (Level 2) | Corporate Obligations
Available-for-sale debt securities:
Fair Value		6,175
Fair value on a recurring basis | Significant unobservable inputs (Level 3)
Available-for-sale debt securities:
Fair Value		0
Fair value on a recurring basis | Significant unobservable inputs (Level 3) | Municipal Obligations
Available-for-sale debt securities:
Fair Value		0
Fair value on a recurring basis | Significant unobservable inputs (Level 3) | Corporate Obligations
Available-for-sale debt securities:
Fair Value		$ 0

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Amount 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 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 45
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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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