Balance Sheet Components

6 Months Ended

Jun. 30, 2019

Balance Sheet Related Disclosures [Abstract]

Available-for-sale short-term investments



	As of
	June 30, 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	$	—	$	—	$	—	$	—	$	70,330	$	1	$	(17	)	$	70,314
Certificates of deposits	149		—		—		149		149		—		—			149
Total	$	149	$	—	$	—	$	149	$	70,479	$	1	$	(17	)	$	70,463

The Company’s short-term investments are primarily comprised of marketable securities that are classified as available-for-sale and consist of government securities with an original maturity or remaining maturity at the time of purchase of greater than three months and no more than twelve months. Accordingly, none of the available-for-sale investments have unrealized losses greater than twelve months.

Inventories



	As of
	June 30, 2019		December 31, 2018
	(In thousands)
Raw materials	$	44,170	$	3,427
Finished goods	232,146		240,444
Total inventories	$	276,316	$	243,871

The Company records provisions for excess and obsolete inventory based on assumptions about future demand and market conditions. While management believes the estimates and assumptions underlying its current forecasts are reasonable, there is risk that additional charges may be necessary if current forecasts are greater than actual demand.

Property and equipment, net



	As of
	June 30, 2019			December 31, 2018
	(In thousands)
Computer equipment	$	9,815		$	9,205
Furniture, fixtures and leasehold improvements	18,447			18,286
Software	28,299			28,065
Machinery and equipment	66,178			60,552
Total property and equipment, gross	122,739			116,108
Accumulated depreciation and amortization	(101,665		)	(95,931		)
Total property and equipment, net	$	21,074		$	20,177

Depreciation and amortization expense pertaining to property and equipment was $3.2 million and $6.1 million for the three and six months ended June 30, 2019, respectively, and $2.6 million and $5.5 million for the three and six months ended July 1, 2018, respectively.

Intangibles, net



	As of June 30, 2019							As of December 31, 2018
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(In thousands)
Technology	$	59,799	$	(57,192	)	$	2,607	$	59,799	$	(56,978	)	$	2,821
Customer contracts and relationships	56,800		(47,615		)	9,185		56,800		(44,280		)	12,520
Other	10,345		(8,840		)	1,505		10,345		(8,540		)	1,805
Total intangibles, net	$	126,944	$	(113,647	)	$	13,297	$	126,944	$	(109,798	)	$	17,146

Amortization of intangibles was $1.7 million and $3.8 million for the three and six months ended June 30, 2019, respectively, and $2.0 million and $4.2 million for the three and six months ended July 1, 2018, respectively.

As of June 30, 2019, estimated amortization expense related to finite-lived intangibles for the remaining years is as follows (in thousands):



2019 (remaining six months)	$	3,192
2020	6,205
2021	2,044
2022	527
2023	514
Thereafter	815
Total estimated amortization expense	$	13,297

Other non-current assets



	As of
	June 30, 2019		December 31, 2018
	(In thousands)
Non-current deferred income taxes	$	55,435	$	57,557
Long-term investments	8,086		2,886
Other	7,882		6,990
Total other non-current assets	$	71,403	$	67,433

Other accrued liabilities



	As of
	June 30, 2019		December 31, 2018
	(In thousands)
Current operating lease liabilities	$	10,243	$	—
Sales and marketing	73,081		91,548
Warranty obligations	11,913		14,412
Sales returns	42,221		46,318
Freight and duty	5,136		10,586
Other	29,279		36,608
Total other accrued liabilities	$	171,873	$	199,472