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MARKETABLE SECURITIES (Tables) | 3 Months Ended
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Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Schedule of marketable securities |
| March 31, 2021 |  | December 31, 2020
(in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value |  | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
Government debt | $ | 13,000 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 13,001 |  |  | $ | 39,996 |  |  | $ | — |  |  | $ | (8) |  |  | $ | 39,988 |
Corporate debt | 257,003 |  |  | 15 |  |  | (369) |  |  | 256,649 |  |  | 253,345 |  |  | 88 |  |  | (152) |  |  | 253,281 |
| $ | 270,003 |  |  | $ | 16 |  |  | $ | (369) |  |  | $ | 269,650 |  |  | $ | 293,341 |  |  | $ | 88 |  |  | $ | (160) |  |  | $ | 293,269 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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