Balance Sheet Components

12 Months Ended

Feb. 02, 2020

Balance Sheet Components Disclosure [Abstract]

Inventory

Inventory consists of the following (in thousands):


	At the End of Fiscal
	2019		2020
Raw materials	$	3,349	$	2,974
Finished goods	41,338		35,544
Inventory	$	44,687	$	38,518

Property and Equipment, Net

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


	At the End of Fiscal
	2019		2020
Test equipment	$	170,930	$	205,555
Computer equipment and software	117,330		141,387
Furniture and fixtures	6,980		8,324
Leasehold improvements	34,286		40,356
Total property and equipment	329,526		395,622
Less: accumulated depreciation and amortization	(204,173)		(272,882)
Property and equipment, net	$	125,353	$	122,740

Depreciation and amortization expense related to property and equipment was $60.2 million, $68.3 million and $80.4 million for fiscal 2018, 2019 and 2020, respectively.

Intangible Assets, Net

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


	At the End of Fiscal
	2019										2020
	Gross Carrying Value		Accumulated Amortization		Net Carrying Amount		Gross Carrying Value		Accumulated Amortization		Net Carrying Amount
Technology patents	$	10,125	$	(6,572)	$	3,553	$	19,125	$	(8,933)	$	10,192
Developed technology	17,700		(1,135)		16,565		56,100		(8,035)		48,065
Intangible assets, net	$	27,825	$	(7,707)	$	20,118	$	75,225	$	(16,968)	$	58,257

In fiscal 2020, we acquired a portfolio of technology patents for $9.0 million with a useful life of 7 years. Intangible assets amortization expense was $1.5 million, $2.6 million and $9.3 million for fiscal 2018, 2019 and 2020, respectively. At the end of fiscal 2020, the weighted-average remaining amortization period was 3.7 years for technology patents and 6 years for developed technology. Amortization of technology patents is included in general and administrative expenses due to their defensive nature and amortization of developed technology is included in cost of product revenue in the consolidated statements of operations.

At the end of fiscal 2020, future expected amortization expense for intangible assets is as follows (in thousands):


Fiscal Years Ending	Estimated Future Amortization Expense
2021	$	10,804
2022	9,846
2023	9,300
2024	9,300
2025	9,300
Thereafter	9,707
Total	$	58,257

Goodwill

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


	Amount
Balance as of the end of fiscal 2019	$	10,997
Goodwill acquired	26,587
Balance as of the end of fiscal 2020	$	37,584

Accrued Expenses and Other Liabilities

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


	At the End of Fiscal
	2019		2020
Taxes payable	$	7,146	$	9,012
Accrued marketing	6,173		7,679
Accrued travel and entertainment expenses	3,570		3,829

Acquisition consideration	3,725		6,149

Other accrued liabilities	19,246		20,554
Total accrued expenses and other liabilities	$	39,860	$	47,223