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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents, at carrying value, total	$ 78,241	$ 100,444	$ 120,257	$ 178,872
Available-for-sale securities, amortized cost	163,042	207,923
Available-for-sale securities, gross unrealized gains	105	28
Available-for-sale securities, gross unrealized (Losses)	(391)	(918)
Available-for-sale securities, estimated fair value	162,756	207,033
Total cash equivalents and available-for-sale securities, amortized cost	197,516	258,743
Total cash equivalents and available-for-sale securities, gross unrealized gains	105	28
Total cash equivalents and available-for-sale securities, gross unrealized (losses)	(391)	(918)
Total cash equivalents and available-for-sale securities, estimated fair value	197,230	257,853
Money market funds
ASSETS
Cash and cash equivalents, at carrying value, total	34,474	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	34,474	50,820
Cash equivalents:
ASSETS
Cash and cash equivalents, at carrying value, total	34,474	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	34,474	50,820
U.S. government-sponsored entity debt securities
ASSETS
Available-for-sale securities, amortized cost	33,753	18,710
Available-for-sale securities, gross unrealized gains	94	0
Available-for-sale securities, gross unrealized (Losses)	(127)	(293)
Available-for-sale securities, estimated fair value	33,720	18,417
Commercial paper securities
ASSETS
Available-for-sale securities, amortized cost	70,906	101,336
Available-for-sale securities, gross unrealized gains	9	22
Available-for-sale securities, gross unrealized (Losses)	(79)	(193)
Available-for-sale securities, estimated fair value	70,836	101,165
Corporate debt securities
ASSETS
Available-for-sale securities, amortized cost	8,335	11,760
Available-for-sale securities, gross unrealized gains	0	0
Available-for-sale securities, gross unrealized (Losses)	(24)	(90)
Available-for-sale securities, estimated fair value	8,311	11,670
Asset-backed securities
ASSETS
Available-for-sale securities, amortized cost	14,689	24,970
Available-for-sale securities, gross unrealized gains	0	2
Available-for-sale securities, gross unrealized (Losses)	(76)	(180)
Available-for-sale securities, estimated fair value	14,613	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)	(2)	(12)
Available-for-sale securities, estimated fair value	5,596	7,938
Certificates of deposit
ASSETS
Available-for-sale securities, amortized cost	29,761	37,599
Available-for-sale securities, gross unrealized gains	2	4
Available-for-sale securities, gross unrealized (Losses)	(83)	(142)
Available-for-sale securities, estimated fair value	$ 29,680	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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