Balance Sheet Components (Tables)

3 Months Ended

Apr. 30, 2019

Balance Sheet Components Disclosure [Abstract]

Inventory

Inventory consists of the following (in thousands):

	As of January 31, 2019		As of April 30, 2019
Raw materials	$	3,349	$	8,490
Finished goods	41,338		37,446
Inventory	$	44,687	$	45,936

Property and Equipment, Net

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

	As of January 31, 2019			As of April 30, 2019
Test equipment	$	170,930		$	180,148
Computer equipment and software	117,330			128,610
Furniture and fixtures	6,980			7,678
Leasehold improvements	34,286			36,002
Total property and equipment	329,526			352,438
Less: accumulated depreciation and amortization	(204,173		)	(223,253		)
Property and equipment, net	$	125,353		$	129,185

Intangible Assets, Net

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

	As of January 31, 2019							As of April 30, 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	$	10,125	$	(6,948	)	$	3,177
Developed technology	17,700		(1,135		)	16,565		56,100		(2,057		)	54,043
Intangible assets, net	$	27,825	$	(7,707	)	$	20,118	$	66,225	$	(9,005	)	$	57,220

Expected Amortization Expenses for Intangible Assets

As of April 30, 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	$	7,138
2021	9,518
2022	8,560
2023	8,014
2024	8,014
Thereafter	15,976
Total	$	57,220

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	25,410
Balance as of April 30, 2019	$	36,407

Accrued Expenses and Other Liabilities

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

	As of January 31, 2019		As of April 30, 2019
Taxes payable	$	7,146	$	7,550
Accrued marketing	6,173		7,560
Accrued travel and entertainment expenses	3,570		4,227
Acquisition consideration held back	3,725		3,725
Other accrued liabilities	19,246		24,330
Total accrued expenses and other liabilities	$	39,860	$	47,392