Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of Available-for-Sale Short-Term Investments

Available-for-sale short-term investments

	As of
	March 31, 2019									December 31, 2018
	Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value		Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
	(In thousands)
U.S. treasuries	$	23,471	$	—	$	(1	)	$	23,470	$	70,330	$	1	$	(17	)	$	70,314
Certificates of deposit	151		—		—			151		149		—		—			149
Total	$	23,622	$	—	$	(1	)	$	23,621	$	70,479	$	1	$	(17	)	$	70,463

Schedule of Inventories

Inventories

	As of
	March 31, 2019		December 31, 2018
	(In thousands)
Raw materials	$	5,650	$	3,427
Finished goods	230,473		240,444
Total inventories	$	236,123	$	243,871

Schedule of Property and Equipment, Net

Property and equipment, net

	As of
	March 31, 2019			December 31, 2018
	(In thousands)
Computer equipment	$	9,814		$	9,205
Furniture, fixtures and leasehold improvements	18,477			18,286
Software	28,848			28,065
Machinery and equipment	62,249			60,552
Total property and equipment, gross	119,388			116,108
Accumulated depreciation and amortization	(98,743		)	(95,931		)
Total property and equipment, net	$	20,645		$	20,177

Schedule of Intangibles, Net

Intangibles, net

	As of March 31, 2019							As of December 31, 2018
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(In thousands)
Technology	$	59,799	$	(57,085	)	$	2,714	$	59,799	$	(56,978	)	$	2,821
Customer contracts and relationships	56,800		(46,111		)	10,689		56,800		(44,280		)	12,520
Other	10,345		(8,690		)	1,655		10,345		(8,540		)	1,805
Total intangibles, net	$	126,944	$	(111,886	)	$	15,058	$	126,944	$	(109,798	)	$	17,146

Schedule of Estimated Amortization Expense Related to Intangibles

As of March 31, 2019, estimated amortization expense related to finite-lived intangibles for the remaining years is as follows (in thousands):

2019 (remaining nine months)	$	4,954
2020	6,205
2021	2,044
2022	527
2023	514
Thereafter	814
Total estimated amortization expense	$	15,058

Schedule of Other Non-Current Assets

Other non-current assets

	As of
	March 31, 2019		December 31, 2018
	(In thousands)
Non-current deferred income taxes	$	56,402	$	57,557
Long-term investments	8,086		2,886
Other	6,753		6,990
Total other non-current assets	$	71,241	$	67,433

Schedule of Other Accrued Liabilities

Other accrued liabilities

	As of
	March 31, 2019		December 31, 2018
	(In thousands)
Current operating lease liabilities	$	10,599	$	—
Sales and marketing	74,659		91,548
Warranty obligations	12,531		14,412
Sales returns	42,202		46,318
Freight and duty	5,268		10,586
Other	32,376		36,608
Total other accrued liabilities	$	177,635	$	199,472