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CASH AND CASH EQUIVALENTS, AND SHORT AND LONG-TERM INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2021
CASH AND CASH EQUIVALENTS, AND SHORT AND LONG-TERM INVESTMENTS |
Schedule of cash and cash equivalents and investments | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Cash |  | 14,667 |  | 9,060
Banks and immediately available investments |  | 4,145,987 |  | 4,608,144
Cash and cash equivalents |  | 4,160,654 |  | 4,617,204
​ Immediately available investments include investments with maturity up to 90 days at the time of acquisition, immediate liquidity and low risk of fair value variation.
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Short-term investments |  | 2,626,212 |  | 3,041,143

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