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Cash equivalents and available for sale securities, gross unrealized gain, before tax.

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Cash equivalents and available for sale securities, gross unrealized loss, before Tax

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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).

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CASH EQUIVALENTS AND MARKETABLE SECURITIES - Summary of Cash Equivalents and Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Cash equivalents, Amortized Cost	$ 117,705	$ 178,872	$ 169,878	$ 131,329
Available-for-sale securities, Amortized Cost	247,513	286,138
Available-for-sale securities, Gross Unrealized Gains	7	11
Available-for-sale securities, Gross Unrealized (Losses)	(1,536)	(304)
Available-for-sale securities, Estimated Fair Value	245,984	285,845
Total cash equivalents and available-for-sale securities, Amortized Cost	301,020	406,057
Total cash equivalents and available-for-sale securities, Gross Unrealized Gains	9	11
Total cash equivalents and available-for-sale securities, Gross Unrealized (Losses)	(1,538)	(304)
Total cash equivalents and available-for-sale securities, Estimated Fair Value	299,491	405,764
Money market funds
ASSETS
Cash equivalents, Amortized Cost	39,669	119,919
Cash equivalents, Gross Unrealized Gains	0	0
Cash equivalents, Gross Unrealized (Losses)	0	0
Cash equivalents, Estimated Fair Value	39,669	119,919
Commercial paper securities
ASSETS
Cash equivalents, Amortized Cost	11,340
Cash equivalents, Gross Unrealized Gains	2
Cash equivalents, Gross Unrealized (Losses)	(2)
Cash equivalents, Estimated Fair Value	11,340
Available-for-sale securities, Amortized Cost	109,817	105,792
Available-for-sale securities, Gross Unrealized Gains	5	7
Available-for-sale securities, Gross Unrealized (Losses)	(455)	(42)
Available-for-sale securities, Estimated Fair Value	109,367	105,757
Certificates of deposit
ASSETS
Available-for-sale securities, Amortized Cost	43,148	45,116
Available-for-sale securities, Gross Unrealized Gains	2	1
Available-for-sale securities, Gross Unrealized (Losses)	(96)	(26)
Available-for-sale securities, Estimated Fair Value	43,054	45,091
Cash equivalents
ASSETS
Cash equivalents, Amortized Cost	53,507	119,919
Cash equivalents, Gross Unrealized Gains	2	0
Cash equivalents, Gross Unrealized (Losses)	(2)	0
Cash equivalents, Estimated Fair Value	53,507	119,919
U.S. government-sponsored entity debt securities
ASSETS
Cash equivalents, Amortized Cost	2,498
Cash equivalents, Gross Unrealized Gains	0
Cash equivalents, Gross Unrealized (Losses)	0
Cash equivalents, Estimated Fair Value	2,498
Available-for-sale securities, Amortized Cost	26,849	30,700
Available-for-sale securities, Gross Unrealized Gains	0	1
Available-for-sale securities, Gross Unrealized (Losses)	(424)	(87)
Available-for-sale securities, Estimated Fair Value	26,425	30,614
Corporate debt securities
ASSETS
Available-for-sale securities, Amortized Cost	10,981	33,723
Available-for-sale securities, Gross Unrealized Gains	0	1
Available-for-sale securities, Gross Unrealized (Losses)	(175)	(42)
Available-for-sale securities, Estimated Fair Value	10,806	33,682
Asset-backed securities
ASSETS
Available-for-sale securities, Amortized Cost	44,710	70,807
Available-for-sale securities, Gross Unrealized Gains	0	1
Available-for-sale securities, Gross Unrealized (Losses)	(386)	(107)
Available-for-sale securities, Estimated Fair Value	44,324	$ 70,701
U.S. treasury bills
ASSETS
Available-for-sale securities, Amortized Cost	12,008
Available-for-sale securities, Gross Unrealized Gains	0
Available-for-sale securities, Gross Unrealized (Losses)	0
Available-for-sale securities, Estimated Fair Value	$ 12,008