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MARKETABLE SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2023
MARKETABLE SECURITIES. |
Schedule of available-for-sale marketable securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2023
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | unrealized | ​ | unrealized | ​ | Fair
​ |  | cost |  | gains |  | losses |  | value
Maturing within one year: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate bonds | ​ | $ | 6,128 | ​ | $ | — | ​ | $ | (163) | ​ | $ | 5,965
Governmental bonds | ​ | $ | 967 | ​ | $ | — | ​ | $ | (10) | ​ | $ | 957
Maturing between one to five years: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate bonds | ​ | ​ | 69,137 | ​ | ​ | — | ​ | ​ | (4,476) | ​ | ​ | 64,661
Governmental bonds | ​ | ​ | 1,744 | ​ | ​ | — | ​ | ​ | (157) | ​ | ​ | 1,587
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance as of December 31, 2023 | ​ | $ | 77,976 | ​ | $ | — | ​ | $ | (4,806) | ​ | $ | 73,170
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2022
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | unrealized | ​ | unrealized | ​ | Fair
​ |  | cost |  | gains |  | losses |  | value
Maturing within one year: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate bonds | ​ | $ | 1,531 | ​ | $ | — | ​ | $ | (32) | ​ | $ | 1,499
Maturing between one to five years: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Corporate bonds | ​ | ​ | 81,866 | ​ | ​ | — | ​ | ​ | (7,897) | ​ | ​ | 73,969
Governmental bonds | ​ | ​ | 2,880 | ​ | ​ | — | ​ | ​ | (282) | ​ | ​ | 2,598
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance as of December 31, 2022 | ​ | $ | 86,277 | ​ | $ | — | ​ | $ | (8,211) | ​ | $ | 78,066
​
Schedule of position of gross unrealized losses and fair values | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Less than 12 months | ​ | 12 months and greater
​ | ​ | ​ | ​ |  | Gross |  | ​ | ​ |  | Gross
​ | ​ | ​ | ​ | ​ | unrealized | ​ | ​ | ​ | ​ | unrealized
​ | ​ | Fair value | ​ | loss | ​ | Fair value | ​ | loss
As of December 31, 2023 | ​ | $ | — | ​ | $ | — | ​ | $ | 73,170 | ​ | $ | (4,806)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months and greater
​ |  | ​ | ​ |  | Gross |  | ​ | ​ |  | Gross
​ | ​ | ​ | ​ | ​ | unrealized | ​ | ​ | ​ | ​ | unrealized
​ | ​ | Fair value | ​ | loss | ​ | Fair value | ​ | loss
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
As of December 31, 2022 | ​ | $ | 3,411 | ​ | $ | (225) | ​ | $ | 74,655 | ​ | $ | (7,986)
​

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