| SHORT-TERM INVESTMENTS | 12 Months Ended | |||||||||||
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| Dec. 31, 2018 | ||||||||||||
| Investments, Debt and Equity Securities [Abstract] | ||||||||||||
| Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | NOTE 3 — SHORT-TERM INVESTMENTS  The following table summarizes the available-for-sale investments held as of December 31, 2018. There were no available-for-sale investments in prior periods.  
 The amortized cost of the available-for-sale investments is adjusted for amortization of premiums and accretion of discounts to maturity. There were no material realized gains or losses recognized on the sale or maturity of available-for-sale investments during the year ended December 31, 2018. | |||||||||||
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- References No definition available. 
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- Definition The entire disclosure for investments in certain debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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