Balance Sheets and Statements of Operations Components

Inventory

Components of inventory as of September 30, 2015 and December 31, 2014 are shown below (in thousands):



	September 30, 2015		December 31, 2014
Raw materials	$	8,731	$	9,922
Finished goods	8,835		10,779
Total inventory	$	17,566	$	20,701

Property and Equipment, Net

Components of property and equipment, net as of September 30, 2015 and December 31, 2014 are shown below (in thousands):



	September 30, 2015			December 31, 2014
Equipment	$	34,512		$	30,486
Software	3,518			3,197
Furniture and fixtures	862			860
Leasehold improvements	2,295			1,780
Construction in progress	163			201
Property and equipment, gross	41,350			36,524
Less: accumulated depreciation and amortization	(32,263		)	(25,744		)
Total property and equipment, net	$	9,087		$	10,780

Depreciation and amortization on our property and equipment for the three months ended September 30, 2015 and 2014 was $2.1 million and $2.6 million. Depreciation and amortization on our property and equipment for the nine months ended September 30, 2015 and 2014 was $6.7 million and $7.2 million.

Deferred Revenue

Deferred revenue as of September 30, 2015 and December 31, 2014 consists of the following (in thousands):



	September 30, 2015			December 31, 2014
Deferred revenue:
Products	$	3,169		$	2,379
Services	63,169			54,841
Total deferred revenue	66,338			57,220
Less: current portion	(44,352		)	(39,256		)
Non-current portion	$	21,986		$	17,964

Accrued Liabilities

Accrued liabilities as of September 30, 2015 and December 31, 2014 consists of the following (in thousands):



	September 30, 2015		December 31, 2014
Accrued compensation and benefits	$	14,459	$	14,447
Accrued tax liabilities	2,753		2,554
Other	3,748		5,434
Total accrued liabilities	$	20,960	$	22,435