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AVAILABLE-FOR-SALE INVESTMENTS - Investments by Major Security Type (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 12,033 | $ 99,234
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (7) | (642)
Total Fair Value | 12,026 | 98,592
Commercial Paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 9,871 | 32,997
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (5) | (241)
Total Fair Value | 9,866 | 32,756
US Treasury Notes |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,162 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (2) |
Total Fair Value | 2,160 |
Corporate Bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 0 | 58,791
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | (349)
Total Fair Value | 0 | 58,442
Municipal Bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 0 | 7,446
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | (52)
Total Fair Value | $ 0 | $ 7,394

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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