Balance Sheet Components (Tables)

12 Months Ended

Jan. 31, 2021

Balance Sheet Components Disclosure [Abstract]

Schedule of Inventory, Current

Inventory consists of the following (in thousands):

	At the End of Fiscal
	2020		2021
Raw materials	$	2,974	$	4,991
Finished goods	35,544		41,742
Inventory	$	38,518	$	46,733

Schedule of Property and Equipment, Net

Property and equipment, net consists of the following (in thousands):

	At the End of Fiscal
	2020		2021
Test equipment	$	205,555	$	238,069
Computer equipment and software	141,387		184,518
Furniture and fixtures	8,324		8,484
Leasehold improvements	40,356		44,444
Total property and equipment	395,622		475,515
Less: accumulated depreciation and amortization	(272,882)		(312,474)
Property and equipment, net	$	122,740	$	163,041

Schedule of Intangible Assets, Net

Intangible assets, net consist of the following (in thousands):

	At the End of Fiscal
	2020						2021
	Gross Carrying Value		Accumulated Amortization		Net Carrying Amount		Gross Carrying Value		Accumulated Amortization		Net Carrying Amount
Technology patents	$	19,125	$	(8,933)	$	10,192	$	19,125	$	(11,722)	$	7,403
Developed technology	56,100		(8,035)		48,065		77,373		(17,499)		59,874
Customer relationships	—		—		—		6,459		(308)		6,151
Trade name	—		—		—		3,623		(403)		3,220
Intangible assets, net	$	75,225	$	(16,968)	$	58,257	$	106,580	$	(29,932)	$	76,648

Schedule of Expected Amortization Expenses for Intangible Assets

At the end of fiscal 2021, future expected amortization expense for intangible assets is as follows (in thousands):

Fiscal Years Ending	Future Expected  Amortization Expense
2022	$	16,231
2023	15,685
2024	15,282
2025	14,477
2026	11,924
Thereafter	3,049
Total	$	76,648

Goodwill

The change in the carrying amount of goodwill is as follows (in thousands):

	Amount
Balance as of the end of fiscal 2020	$	37,584
Goodwill acquired	321,152
Balance as of the end of fiscal 2021	$	358,736

Schedule of Accrued Expenses and Other Liabilities

Accrued expenses and other liabilities consist of the following (in thousands):

	At the End of Fiscal
	2020		2021
Taxes payable	$	9,012	$	4,097
Accrued marketing	7,679		15,638
Accrued travel and entertainment expenses	3,829		866
Acquisition consideration	6,149		9,600
Other accrued liabilities	20,554		31,553
Total accrued expenses and other liabilities	$	47,223	$	61,754