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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Cash and cash equivalents, at carrying value, total | $ 66,830 | $ 100,444 | $ 117,705 | $ 178,872
Available-for-sale securities, amortized cost | 115,852 | 207,923 |  |
Available-for-sale securities, gross unrealized gains | 0 | 28 |  |
Available-for-sale securities, gross unrealized (Losses) | (544) | (918) |  |
Available-for-sale securities, estimated fair value | 115,308 | 207,033 |  |
Total cash equivalents and available-for-sale securities, amortized cost | 124,020 | 258,743 |  |
Total cash equivalents and available-for-sale securities, gross unrealized gains | 0 | 28 |  |
Total cash equivalents and available-for-sale securities, gross unrealized (losses) | (544) | (918) |  |
Total cash equivalents and available-for-sale securities, estimated fair value | 123,476 | 257,853 |  |
Money market funds |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents, at carrying value, total | 8,168 | 50,820 |  |
Cash equivalents, gross unrealized gains | 0 | 0 |  |
Cash and cash equivalents accumulated gross unrealized loss before tax | 0 | 0 |  |
Cash equivalents, estimated fair value | 8,168 | 50,820 |  |
Cash equivalents: |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents, at carrying value, total | 8,168 | 50,820 |  |
Cash equivalents, gross unrealized gains | 0 | 0 |  |
Cash and cash equivalents accumulated gross unrealized loss before tax | 0 | 0 |  |
Cash equivalents, estimated fair value | 8,168 | 50,820 |  |
U.S. government-sponsored entity debt securities |  |  |  |
ASSETS |  |  |  |
Available-for-sale securities, amortized cost | 32,685 | 18,710 |  |
Available-for-sale securities, gross unrealized gains | 0 | 0 |  |
Available-for-sale securities, gross unrealized (Losses) | (389) | (293) |  |
Available-for-sale securities, estimated fair value | 32,296 | 18,417 |  |
Commercial paper securities |  |  |  |
ASSETS |  |  |  |
Available-for-sale securities, amortized cost | 41,881 | 101,336 |  |
Available-for-sale securities, gross unrealized gains | 0 | 22 |  |
Available-for-sale securities, gross unrealized (Losses) | (43) | (193) |  |
Available-for-sale securities, estimated fair value | 41,838 | 101,165 |  |
Corporate debt securities |  |  |  |
ASSETS |  |  |  |
Available-for-sale securities, amortized cost |  | 11,760 |  |
Available-for-sale securities, gross unrealized gains |  | 0 |  |
Available-for-sale securities, gross unrealized (Losses) |  | (90) |  |
Available-for-sale securities, estimated fair value |  | 11,670 |  |
Asset-backed securities |  |  |  |
ASSETS |  |  |  |
Available-for-sale securities, amortized cost | 10,557 | 24,970 |  |
Available-for-sale securities, gross unrealized gains | 0 | 2 |  |
Available-for-sale securities, gross unrealized (Losses) | (52) | (180) |  |
Available-for-sale securities, estimated fair value | 10,505 | 24,792 |  |
U.S. treasury bills |  |  |  |
ASSETS |  |  |  |
Available-for-sale securities, amortized cost | 5,598 | 7,950 |  |
Available-for-sale securities, gross unrealized gains | 0 | 0 |  |
Available-for-sale securities, gross unrealized (Losses) | (25) | (12) |  |
Available-for-sale securities, estimated fair value | 5,573 | 7,938 |  |
Certificates of deposit |  |  |  |
ASSETS |  |  |  |
Available-for-sale securities, amortized cost | 25,131 | 37,599 |  |
Available-for-sale securities, gross unrealized gains | 0 | 4 |  |
Available-for-sale securities, gross unrealized (Losses) | (35) | (142) |  |
Available-for-sale securities, estimated fair value | $ 25,096 | 37,461 |  |
Agency bonds |  |  |  |
ASSETS |  |  |  |
Available-for-sale securities, amortized cost |  | 5,598 |  |
Available-for-sale securities, gross unrealized gains |  | 0 |  |
Available-for-sale securities, gross unrealized (Losses) |  | (8) |  |
Available-for-sale securities, estimated fair value |  | $ 5,590 |  |

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