Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2017

Balance Sheet Components [Abstract]

Schedule of Gains and Losses on Available for Sale Securities

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

	March 31, 2017
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Commercial paper	$	29,844	$	39	$	—		$	29,883
U.S. government notes	98,591		—		(214		)	98,377
Corporate bonds	168,621		118		(324		)	168,415
Total marketable securities	$	297,056	$	157	$	(538	)	$	296,675

	December 31, 2016
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Commercial paper	$	5,962	$	—	$	—		$	5,962
U.S. government notes	110,945		5		(194		)	110,756
Corporate bonds	183,455		109		(372		)	183,192
Total marketable securities	$	300,362	$	114	$	(566	)	$	299,910

Schedule of Available-For-Sale Securities by Remaining Contractual Maturity

As of March 31, 2017, the contractual maturities of our investments did not exceed 24 months. The fair values of available-for-sale investments, by remaining contractual maturity, are as follows (in thousands):

	March 31, 2017
Due in 1 year or less	$	168,732
Due in 1 year through 2 years	127,943
Total marketable securities	$	296,675

Schedule of Accounts Receivable

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

	March 31, 2017			December 31, 2016
Accounts receivable	$	211,134		$	254,640
Allowance for doubtful accounts	(66		)	(204		)
Sales return reserve	(2,006		)	(1,317		)
Accounts receivable, net	$	209,062		$	253,119

Schedule of Inventories

Inventories consist of the following (in thousands):

	March 31, 2017		December 31, 2016
Raw materials	$	108,066	$	99,190
Finished goods	178,720		137,300
Total inventories	$	286,786	$	236,490

Schedule of Prepaid Expenses and Other Current Assets

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

	March 31, 2017		December 31, 2016
Inventory deposit	$	39,296	$	60,315
Prepaid income taxes	34,386		17,383
Other current assets	112,216		79,140
Other prepaid expenses and deposits	11,837		11,846
Total prepaid expenses and other current assets	$	197,735	$	168,684

Schedule of Property and Equipment, net

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

	March 31, 2017			December 31, 2016
Equipment and machinery	$	42,581		$	40,721
Computer hardware and software	18,676			17,420
Furniture and fixtures	2,969			2,879
Leasehold improvements	29,619			29,498
Building	35,154			35,154
Construction-in-process	1,039			421
Property and equipment, gross	130,038			126,093
Less: accumulated depreciation	(53,719		)	(49,132		)
Property and equipment, net	$	76,319		$	76,961

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2017		December 31, 2016
Accrued compensation costs	$	30,008	$	52,854
Accrued warranty costs	7,658		6,744
Accrued manufacturing costs	21,785		14,824
Accrued professional fees	8,852		6,829
Accrued taxes	914		1,098
Other	6,074		8,602
Total accrued liabilities	$	75,291	$	90,951

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,
	2017			2016
Warranty accrual, beginning of period	$	6,744		$	4,718
Liabilities accrued for warranties issued during the period	1,859			693
Warranty costs incurred during the period	(945		)	(528		)
Warranty accrual, end of period	$	7,658		$	4,883