CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Wavecell Pte. Ltd.	Fuze	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common Stock Wavecell Pte. Ltd.	Common Stock Fuze	Common Stock Cumulative Effect, Period of Adoption, Adjustment	Additional Paid-in Capital	Additional Paid-in Capital Fuze	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Mar. 31, 2019					96,119,888
Beginning balance at Mar. 31, 2019	$ 249,390				$ 96				$ 506,949			$ (7,353)	$ (250,302)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under stock plans, less withholding (in shares)								4,452,267
Issuance of common stock under stock plans, less withholding				$ 7,777				$ 4			$ 7,773
Issuance of common stock related to acquisition (in shares)					2,606,466
Issuance of common stock related to acquisition	35,840				$ 3				35,837
Stock-based compensation expense	71,821								71,821
Equity component of convertible senior notes, net of issuance costs	3,094								3,094
Unrealized investment loss/gain	(203)											(203)
Foreign currency translation adjustment	(4,620)											(4,620)
Net loss	(172,368)												(172,368)
Ending balance (in shares) at Mar. 31, 2020					103,178,621
Ending balance at Mar. 31, 2020	190,731			$ (2,800)	$ 103				625,474			(12,176)	(422,670)	$ (2,800)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under stock plans, less withholding (in shares)					6,067,672
Issuance of common stock under stock plans, less withholding	13,269				$ 6				13,263
Issuance of common stock related to acquisition (in shares)					(111,554)
Issuance of common stock related to acquisition	8,489								8,489
Stock-based compensation expense	108,417								108,417
Unrealized investment loss/gain	247											247
Foreign currency translation adjustment	7,736											7,736
Net loss	(165,585)												(165,585)
Ending balance (in shares) at Mar. 31, 2021					109,134,739
Ending balance at Mar. 31, 2021	160,504				$ 109				755,643			(4,193)	(591,055)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under stock plans, less withholding (in shares)					6,969,809
Issuance of common stock under stock plans, less withholding	15,922				$ 7				15,915
Issuance of common stock related to acquisition (in shares)						(25,536)	4,070,355
Issuance of common stock related to acquisition		$ 0	$ 80,856				$ 4			$ 80,852
Stock-based compensation expense	132,736								132,736
Stock-based compensation expense related to Fuze acquisition (in shares)					53,498
Stock-based compensation expense related to Fuze acquisition	828								828
Share repurchase (in shares)					(2,340,058)
Share repurchase	(44,976)				$ (2)				(44,974)
Equity component of convertible senior notes, net of issuance costs	15,599								15,599
Unrealized investment loss/gain	(571)											(571)
Foreign currency translation adjustment	(3,149)											(3,149)
Net loss	(175,383)												(175,383)
Ending balance at Mar. 31, 2022	$ 182,366				$ 118				$ 956,599			$ (7,913)	$ (766,438)