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MARKETABLE SECURITIES (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 253,764 | $ 373,400
Gross Unrealized Gains | 71 | 21
Gross Unrealized Losses | (5,394) | (1,186)
Estimated Fair Market Value | $ 248,441 | $ 372,235
Weighted Average Interest Rate on Investments | 2.08% | 0.45%
Interest receivable | $ 1,200 | $ 1,500
Investments due in 3 months or less: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 21,803 | 97,250
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (135) | (3)
Estimated Fair Market Value | 21,668 | 97,247
Investments due in 4-12 months: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 173,833 | 25,054
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (4,019) | (42)
Estimated Fair Market Value | 169,814 | 25,012
Investments due in 12 months or greater: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 58,128 | 251,096
Gross Unrealized Gains | 71 | 21
Gross Unrealized Losses | (1,240) | (1,141)
Estimated Fair Market Value | 56,959 | 249,976
Commercial paper | Investments due in 3 months or less: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost |  | 89,965
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Estimated Fair Market Value |  | 89,965
Corporate securities | Investments due in 3 months or less: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 21,803 | 7,285
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (135) | (3)
Estimated Fair Market Value | 21,668 | 7,282
Corporate securities | Investments due in 4-12 months: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 173,833 | 25,054
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (4,019) | (42)
Estimated Fair Market Value | 169,814 | 25,012
Corporate securities | Investments due in 12 months or greater: |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 58,128 | 251,096
Gross Unrealized Gains | 71 | 21
Gross Unrealized Losses | (1,240) | (1,141)
Estimated Fair Market Value | $ 56,959 | $ 249,976

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