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v3.23.2

MARKETABLE SECURITIES (Tables) | 6 Months Ended
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Jun. 30, 2023
MARKETABLE SECURITIES |
Schedule of Available-for-sale Securities | Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at June 30, 2023, were as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrealized | ​ | Estimated Fair
(In thousands) |  | Cost |  | Gains |  | Losses |  | Market Value
Investments due in 3 months or less: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Corporate securities | ​ | $ | 50,417 | ​ | $ | — | ​ | $ | (281) | ​ | $ | 50,136
Total | ​ |  | 50,417 | ​ |  | — | ​ |  | (281) | ​ |  | 50,136
Investments due in 4-12 months: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Corporate securities | ​ |  | 78,042 | ​ |  | 7 | ​ |  | (1,383) | ​ |  | 76,666
Total | ​ |  | 78,042 | ​ |  | 7 | ​ |  | (1,383) | ​ |  | 76,666
Investments due in 12 months or greater: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Corporate securities | ​ |  | 137,055 | ​ |  | 38 | ​ |  | (1,676) | ​ |  | 135,417
Total | ​ | ​ | 137,055 | ​ |  | 38 | ​ | ​ | (1,676) | ​ |  | 135,417
Total marketable securities | ​ | $ | 265,514 | ​ | $ | 45 | ​ | $ | (3,340) | ​ | $ | 262,219
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrealized | ​ | Estimated Fair
(In thousands) |  | Cost |  | Gains |  | Losses |  | Market Value
Investments due in 3 months or less: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Corporate securities | ​ | $ | 21,803 | ​ | $ | — | ​ | $ | (135) | ​ | $ | 21,668
Total | ​ |  | 21,803 | ​ |  | — | ​ |  | (135) | ​ |  | 21,668
Investments due in 4-12 months: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Corporate securities | ​ |  | 173,833 | ​ |  | — | ​ |  | (4,019) | ​ |  | 169,814
Total | ​ |  | 173,833 | ​ |  | — | ​ |  | (4,019) | ​ |  | 169,814
Investments due in 12 months or greater: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Corporate securities | ​ | ​ | 58,128 | ​ |  | 71 | ​ |  | (1,240) | ​ |  | 56,959
Total | ​ |  | 58,128 | ​ |  | 71 | ​ |  | (1,240) | ​ |  | 56,959
Total marketable securities | ​ | $ | 253,764 | ​ | $ | 71 | ​ | $ | (5,394) | ​ | $ | 248,441
Schedule of Available-for-sale Securities in an Unrealized Loss Position | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than 12 Months | ​ | 12 Months or Longer | ​ | Total
​ |  | Estimated |  | Gross |  | Estimated |  | Gross |  | Estimated |  | Gross
​ | ​ | Fair Market | ​ | Unrealized | ​ | Fair Market | ​ | Unrealized | ​ | Fair Market | ​ | Unrealized
(In thousands) | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses
Corporate securities | ​ | $ | 141,511 | ​ | $ | (1,584) | ​ | $ | 112,792 | ​ | $ | (1,756) | ​ | $ | 254,303 | ​ | $ | (3,340)
Total marketable securities | ​ | $ | 141,511 | ​ | $ | (1,584) | ​ | $ | 112,792 | ​ | $ | (1,756) | ​ | $ | 254,303 | ​ | $ | (3,340)

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