Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2015

Balance Sheet Components [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The following table summarizes the unrealized gains and losses and fair value of our available-for-sale marketable securities (in thousands):

	March 31, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. government notes—due within one year	$	209,232	$	—	$	(79	)	$	209,153

	December 31, 2014
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. government notes—due within one year	$	209,671	$	—	$	(245	)	$	209,426

Schedule of Accounts Receivable

Accounts receivable, net consists of the following (in thousands):

	March 31, 2015			December 31, 2014
Accounts receivable	$	115,937		$	100,076
Allowance for doubtful accounts	(1,260		)	(1,063		)
Sales return reserve	(1,620		)	(2,031		)
Accounts receivable, net	$	113,057		$	96,982

Schedule of Inventories

Inventories consist of the following (in thousands):

	March 31, 2015		December 31, 2014
Raw materials	$	17,237	$	17,094
Finished goods	73,988		63,425
Total inventories	$	91,225	$	80,519

Schedule of Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31, 2015		December 31, 2014
Prepaid income taxes	$	26,412	$	25,212
Other current assets	5,323		9,820
Other prepaids and deposits	5,887		5,237
Total prepaid expenses and other current assets	$	37,622	$	40,269

Schedule of Property and Equipment, net

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

	March 31, 2015			December 31, 2014
Equipment and machinery	$	19,785		$	18,265
Computer hardware and software	8,600			7,772
Furniture and fixtures	1,837			1,373
Leasehold improvements	21,376			19,420
Building	35,154			35,154
Construction-in-process	5,877			6,532
Property and equipment, gross	92,629			88,516
Less: accumulated depreciation	(19,842		)	(16,958		)
Property and equipment, net	$	72,787		$	71,558

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2015		December 31, 2014
Accrued payroll related costs	$	10,809	$	30,749
Accrued warranty costs	3,686		3,204
Accrued manufacturing costs	2,682		1,089
Accrued professional fees	6,360		2,354
Accrued taxes	1,110		1,577
Other	4,273		1,396
Total accrued liabilities	$	28,920	$	40,369

Schedule of Warranty Accrual

The following table summarizes the activity related to our accrued liability for estimated future warranty costs (in thousands):

	Three Months Ended March 31,
	2015			2014
Warranty accrual, beginning of period	$	3,204		$	5,075
Liabilities accrued for warranties issued during the period	783			488
Warranty costs incurred during the period	(301		)	(908		)
Warranty accrual, end of period	$	3,686		$	4,655

Schedule of Deferred Revenue

Other current liabilities consist of the following (in thousands):

	March 31, 2015		December 31, 2014
Liability for early exercised shares subject to repurchase	$	3,860	$	4,616
Sales tax payable	2,715		3,101
Lease financing obligations, current portion	1,147		1,087
Other	740		2,445
Total other current liabilities	$	8,462	$	11,249