Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	2022 Annual Incentive Plan	Common Stock	Common Stock A&R Plan	Common Stock 2022 Annual Incentive Plan	Additional Paid-In Capital	Additional Paid-In Capital A&R Plan	Additional Paid-In Capital 2022 Annual Incentive Plan	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning Balance at Mar. 31, 2022	$ 915,656		$ 45			$ 2,110,160			$ 179	$ (1,194,728)
Beginning Balance, Shares (in shares) at Mar. 31, 2022			448,812,321
Issuance of common stock upon exercise of stock options	1,533					1,533
Issuance of common stock upon exercise of stock options (in shares)			1,065,784
Issuance of common stock upon release of restricted stock units (in shares)				1,461,448
Net share settlements for stock-based minimum tax withholdings (in shares)			(14,036)
Stock-based compensation expense	25,915					25,915
Other comprehensive income (loss)	624								624
Net loss	(89,532)									(89,532)
Ending Balance at Jun. 30, 2022	854,196		$ 45			2,137,608			803	(1,284,260)
Ending Balance, Shares (in shares) at Jun. 30, 2022			451,325,517
Beginning Balance at Mar. 31, 2022	$ 915,656		$ 45			2,110,160			179	(1,194,728)
Beginning Balance, Shares (in shares) at Mar. 31, 2022			448,812,321
Issuance of common stock under employee stock purchase plan (in shares)	1,130,337
Other comprehensive income (loss)	$ (490)
Net loss	(247,558)
Ending Balance at Dec. 31, 2022	750,992		$ 45			2,193,544			(311)	(1,442,286)
Ending Balance, Shares (in shares) at Dec. 31, 2022			457,161,483
Beginning Balance at Jun. 30, 2022	854,196		$ 45			2,137,608			803	(1,284,260)
Beginning Balance, Shares (in shares) at Jun. 30, 2022			451,325,517
Issuance of common stock upon exercise of stock options	2,498					2,498
Issuance of common stock upon exercise of stock options (in shares)			1,430,629
Issuance of common stock upon release of restricted stock units (in shares)				1,580,591
Net share settlements for stock-based minimum tax withholdings	(86)					(86)
Net share settlements for stock-based minimum tax withholdings (in shares)			(14,038)
Issuance of common stock under employee stock purchase plan (in shares)			1,130,337
Issuance of common stock under employee stock purchase plan	3,238					3,238
Stock-based compensation expense	24,710					24,710
Other comprehensive income (loss)	829								829
Net loss	(66,065)									(66,065)
Ending Balance at Sep. 30, 2022	819,320		$ 45			2,167,968			1,632	(1,350,325)
Ending Balance, Shares (in shares) at Sep. 30, 2022			455,453,036
Issuance of common stock upon exercise of stock options	49					49
Issuance of common stock upon exercise of stock options (in shares)			96,443
Issuance of common stock upon release of restricted stock units (in shares)				1,631,315
Net share settlements for stock-based minimum tax withholdings	$ (58)					(58)
Net share settlements for stock-based minimum tax withholdings (in shares)			(19,311)
Issuance of common stock under employee stock purchase plan (in shares)	0
Stock-based compensation expense	$ 25,585					25,585
Other comprehensive income (loss)	(1,943)								(1,943)
Net loss	(91,961)									(91,961)
Ending Balance at Dec. 31, 2022	750,992		$ 45			2,193,544			(311)	(1,442,286)
Ending Balance, Shares (in shares) at Dec. 31, 2022			457,161,483
Beginning Balance at Mar. 31, 2023	713,939		$ 46			2,220,897			(620)	(1,506,384)
Beginning Balance, Shares (in shares) at Mar. 31, 2023			461,199,962
Issuance of common stock upon exercise of stock options	85					85
Issuance of common stock upon exercise of stock options (in shares)			180,718
issuance of common stock upon release of restricted stock units		$ 18,630			$ 1			$ 18,629
Issuance of common stock upon release of restricted stock units (in shares)				1,812,802	8,961,053
Net share settlements for stock-based minimum tax withholdings	(121)					(121)
Net share settlements for stock-based minimum tax withholdings (in shares)			(58,985)
Stock-based compensation expense	47,915					47,915
Other comprehensive income (loss)	(334)								(334)
Net loss	(104,624)									(104,624)
Ending Balance at Jun. 30, 2023	675,490		$ 47			2,287,405			(954)	(1,611,008)
Ending Balance, Shares (in shares) at Jun. 30, 2023			472,095,550
Beginning Balance at Mar. 31, 2023	$ 713,939		$ 46			2,220,897			(620)	(1,506,384)
Beginning Balance, Shares (in shares) at Mar. 31, 2023			461,199,962
Issuance of common stock upon exercise of stock options (in shares)	1,517,517
Issuance of common stock under employee stock purchase plan (in shares)	1,509,536
Other comprehensive income (loss)	$ 620
Net loss	(457,870)
Ending Balance at Dec. 31, 2023	377,188		$ 48			2,341,394			0	(1,964,254)
Ending Balance, Shares (in shares) at Dec. 31, 2023			482,553,646
Beginning Balance at Jun. 30, 2023	675,490		$ 47			2,287,405			(954)	(1,611,008)
Beginning Balance, Shares (in shares) at Jun. 30, 2023			472,095,550
Issuance of common stock upon exercise of stock options	388					388
Issuance of common stock upon exercise of stock options (in shares)			828,561
issuance of common stock upon release of restricted stock units		$ 102		$ 1			$ (1)	$ 102
Issuance of common stock upon release of restricted stock units (in shares)				4,358,378	57,996
Net share settlements for stock-based minimum tax withholdings	(22)					(22)
Net share settlements for stock-based minimum tax withholdings (in shares)			(19,022)
Issuance of common stock under employee stock purchase plan (in shares)			1,509,536
Issuance of common stock under employee stock purchase plan	1,411					1,411
Stock-based compensation expense	22,198					22,198
Other comprehensive income (loss)	954								954
Net loss	(75,270)									(75,270)
Ending Balance at Sep. 30, 2023	625,251		$ 48			2,311,481			0	(1,686,278)
Ending Balance, Shares (in shares) at Sep. 30, 2023			478,830,999
Issuance of common stock upon exercise of stock options	217					217
Issuance of common stock upon exercise of stock options (in shares)			508,238
Issuance of common stock upon release of restricted stock units (in shares)				3,230,939
Net share settlements for stock-based minimum tax withholdings	$ (15)					(15)
Net share settlements for stock-based minimum tax withholdings (in shares)			(16,530)
Issuance of common stock under employee stock purchase plan (in shares)	0
Stock-based compensation expense	$ 29,711					29,711
Other comprehensive income (loss)	0
Net loss	(277,976)									(277,976)
Ending Balance at Dec. 31, 2023	$ 377,188		$ 48			$ 2,341,394			$ 0	$ (1,964,254)
Ending Balance, Shares (in shares) at Dec. 31, 2023			482,553,646