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CASH AND CASH EQUIVALENTS, AND SHORT AND LONG-TERM INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2018
CASH AND CASH EQUIVALENTS, AND SHORT AND LONG-TERM INVESTMENTS |
Schedule of cash and cash equivalents and investments |
|  | 2018 |  | 2017
Cash |  | 6,800 |  | 10,439
Banks and immediately available investments |  | 2,883,344 |  | 2,544,899
Cash and cash equivalents |  | 2,890,144 |  | 2,555,338
|  | 2018 |  | 2017
Held for trading |  | 459,470 |  | 821,518
Short-term investments |  | 459,470 |  | 821,518

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