Balance Sheet Components (Tables)

9 Months Ended

Oct. 31, 2017

Balance Sheet Components Disclosure [Abstract]

Schedule of Inventory

Inventory consists of the following (in thousands):

	As of January 31, 2017		As of October 31, 2017
Raw materials	$	3,003	$	5,926
Finished goods	20,495		31,282
Inventory	$	23,498	$	37,208

Schedule of Property and Equipment, Net

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

	As of January 31, 2017			As of October 31, 2017
Test equipment	$	105,955		$	135,497
Computer equipment and software	54,521			66,270
Furniture and fixtures	4,494			5,337
Leasehold improvements	10,332			13,815
Total property and equipment	175,302			220,919
Less: accumulated depreciation and amortization	(93,607		)	(136,655		)
Property and equipment, net	$	81,695		$	84,264

Schedule of Intangible Assets, Net

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

	As of January 31, 2017			As of October 31, 2017
Technology patents	$	10,125		$	10,125
Accumulated amortization	(3,565		)	(4,693		)
Intangible assets, net	$	6,560		$	5,432

Schedule of Expected Amortization Expenses for Intangible Assets

As of October 31, 2017, expected amortization expense for intangible assets for each of the next five years is as follows (in thousands):

Years Ending January 31,	Estimated  Future Amortization Expense
Remainder of 2018	$	376
2019	1,504
2020	1,504
2021	1,504
2022	544
Total	$	5,432

Schedule of Accrued Expenses and Other Liabilities

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

	As of January 31, 2017		As of October 31, 2017
Sales and use tax payable	$	540	$	1,256
Accrued professional fees	1,765		1,430
Accrued marketing	6,718		8,899
Accrued travel and entertainment expenses	2,235		4,112
Income tax payable	1,135		1,620
Other accrued liabilities	9,304		7,628
Total accrued expenses and other liabilities	$	21,697	$	24,945