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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Cash equivalents:
Amortized Cost	$ 27,786,000	$ 45,204,000	$ 66,830,000	$ 100,444,000
Marketable securities:
Amortized Cost		35,564,000
Gross Unrealized Gains		241,000
Gross Unrealized Losses	0	(7,000)
Estimated Fair Value	0	35,798,000
Total cash equivalents and marketable securities, amortized cost	$ 0	38,072,000
Total cash equivalents and marketable securities, gross unrealized gains		241,000
Total cash equivalents and marketable securities, gross unrealized losses		(7,000)
Total cash equivalents and marketable securities, estimated fair value		38,306,000
U.S. government-sponsored entity debt securities
Marketable securities:
Amortized Cost		22,347,000
Gross Unrealized Gains		219,000
Gross Unrealized Losses		0
Estimated Fair Value		22,566,000
Commercial paper securities
Marketable securities:
Amortized Cost		2,825,000
Gross Unrealized Gains		2,000
Gross Unrealized Losses		(1,000)
Estimated Fair Value		2,826,000
Corporate debt securities
Marketable securities:
Amortized Cost		1,399,000
Gross Unrealized Gains		6,000
Gross Unrealized Losses		0
Estimated Fair Value		1,405,000
Asset-backed securities
Marketable securities:
Amortized Cost		2,368,000
Gross Unrealized Gains		9,000
Gross Unrealized Losses		0
Estimated Fair Value		2,377,000
U.S. treasury bills
Marketable securities:
Amortized Cost		5,599,000
Gross Unrealized Gains		0
Gross Unrealized Losses		(6,000)
Estimated Fair Value		5,593,000
Certificates of deposit
Marketable securities:
Amortized Cost		1,026,000
Gross Unrealized Gains		5,000
Gross Unrealized Losses		0
Estimated Fair Value		1,031,000
Cash equivalents:
Cash equivalents:
Amortized Cost		2,508,000
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		2,508,000
Money market funds
Cash equivalents:
Amortized Cost		2,508,000
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		$ 2,508,000

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