Balance Sheet Components (Tables)

9 Months Ended

Oct. 31, 2018

Balance Sheet Components Disclosure [Abstract]

Schedule of Inventory

Inventory consists of the following (in thousands):

	As of January 31, 2018		As of October 31, 2018
Raw materials	$	1,181	$	4,880
Finished goods	33,316		45,857
Inventory	$	34,497	$	50,737

Schedule of Property and Equipment, Net

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

	As of January 31, 2018			As of October 31, 2018
Test equipment	$	142,311		$	166,936
Computer equipment and software	72,329			103,366
Furniture and fixtures	5,363			5,619
Leasehold improvements	15,032			31,707
Total property and equipment	235,035			307,628
Less: accumulated depreciation and amortization	(145,893		)	(192,362		)
Property and equipment, net	$	89,142		$	115,266

Schedule of Intangible Assets, Net

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

	As of January 31, 2018							As of October 31, 2018
	Gross Carrying Value		Accumulated Amortization			Net Carrying Amount		Gross Carrying Value		Accumulated Amortization			Net Carrying Amount
Technology patents	$	10,125	$	(5,068	)	$	5,057	$	10,125	$	(6,196	)	$	3,929
Developed technology	—		—			—		17,700		(503		)	17,197
Intangible assets, net	$	10,125	$	(5,068	)	$	5,057	$	27,825	$	(6,699	)	$	21,126

Schedule of Expected Amortization Expenses for Intangible Assets

As of October 31, 2018, future expected amortization expense for intangible assets is as follows (in thousands):

Fiscal Years Ending January 31,	Estimated  Future Amortization Expense
Remainder of 2019	$	1,008
2020	4,032
2021	4,032
2022	3,074
2023	2,529
Thereafter	6,451
Total	$	21,126

Schedule of Goodwill

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

	Amount
Balance as of January 31, 2018	$	—
Goodwill acquired	10,997
Balance as of October 31, 2018	$	10,997

Schedule of Accrued Expenses and Other Liabilities

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

	As of January 31, 2018		As of October 31, 2018
Taxes payable	$	4,052	$	6,907
Accrued marketing	5,928		8,561
Accrued travel and entertainment expenses	4,386		4,108
Acquisition consideration held back	—		3,725
Other accrued liabilities	12,463		20,332
Total accrued expenses and other liabilities	$	26,829	$	43,633