Balance Sheet Components - (Tables)

9 Months Ended

Oct. 31, 2019

Balance Sheet Components Disclosure [Abstract]

Inventory

Inventory consists of the following (in thousands):

	As of January 31, 2019		As of October 31, 2019
Raw materials	$	3,349	$	3,163
Finished goods	41,338		36,688
Inventory	$	44,687	$	39,851

Property and Equipment, Net

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

	As of January 31, 2019		As of October 31, 2019
Test equipment	$	170,930	$	199,878
Computer equipment and software	117,330		139,188
Furniture and fixtures	6,980		8,483
Leasehold improvements	34,286		40,235
Total property and equipment	329,526		387,784
Less: accumulated depreciation and amortization	(204,173)		(257,548)
Property and equipment, net	$	125,353	$	130,236

Intangible Assets, Net

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

	As of January 31, 2019						As of October 31, 2019
	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	$	(8,235)	$	10,890
Developed technology	17,700		(1,135)		16,565		56,100		(5,962)		50,138
Intangible assets, net	$	27,825	$	(7,707)	$	20,118	$	75,225	$	(14,197)	$	61,028

Expected Amortization Expenses for Intangible Assets

As of October 31, 2019, future expected amortization expense for intangible assets is as follows (in thousands):

Fiscal Years Ending January 31,	Estimated  Future Amortization Expense
Remainder of 2020	$	2,771
2021	10,804
2022	9,846
2023	9,300
2024	9,300
Thereafter	19,007
Total	$	61,028

Goodwill

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

	Amount
Balance as of January 31, 2019	$	10,997
Goodwill acquired	25,423
Balance as of October 31, 2019	$	36,420

Accrued Expenses and Other Liabilities

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

	As of January 31, 2019		As of October 31, 2019
Taxes payable	$	7,146	$	10,579
Accrued marketing	6,173		10,159
Accrued travel and entertainment expenses	3,570		3,054
Acquisition consideration held back	3,725		—
Other accrued liabilities	19,246		24,431
Total accrued expenses and other liabilities	$	39,860	$	48,223