(4) Balance Sheet Components

Short-Term Investments

The Company did not have any investments as of January 31, 2017. Unrealized gains or losses from the Company’s short-term investments were immaterial as of October 31, 2017. There was no other-than-temporary impairment for these investments as of October 31, 2017.

The following table summarizes the fair value of the Company’s available for sale investments as of October 31, 2017 (in thousands):

	As of October 31, 2017
	Carrying Amount		Fair Value
Due within one year	$	5,994	$	5,994
Total	$	5,994	$	5,994

Property and Equipment, Net

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

	As of January 31,			As of October 31,
	2017			2017
Computer equipment	$	17,431		$	19,902
Leasehold improvements		5,941			5,944
Sales demonstration equipment		5,903			7,350
Beta equipment		1,060			1,639
Furniture and fixtures		1,550			1,777
Software		649			660
Construction in progress		39			135
Total property and equipment		32,573			37,407
Less accumulated depreciation and amortization		(22,163	)		(27,184	)
Total property and equipment, net	$	10,410		$	10,223

Depreciation and amortization expense related to property and equipment for the nine months ended October 31, 2016 and 2017 was $7.1 million and $5.3 million, respectively. Depreciation and amortization expense related to property and equipment for the three months ended October 31, 2016 and 2017 was $2.3 million and $1.7 million, respectively.

Accrued and Other Current Liabilities

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

	As of January 31,		As of October 31,
	2017		2017
Accrued sales and use taxes payable	$	1,697	$	2,081
Accrued sales commissions		4,706		2,565
Accrued bonus		2,427		1,177
Accrued vacation		3,561		3,787
Other accruals		8,277		8,807
Total accrued and other current liabilities	$	20,668	$	18,417