	As of
	December 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	$	—	$	—	$	—	$	—	$	70,330	$	1	$	(17	)	$	70,314
Certificates of deposits		149		—		—		149		149		—		—			149
Convertible debt		1,326		—		—		1,326		—		—		—			—
Total	$	1,475	$	—	$	—	$	1,475	$	70,479	$	1	$	(17	)	$	70,463

The Company’s short-term investments are primarily comprised of marketable and convertible debt securities that are classified as available-for-sale and 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.

	As of
	December 31, 2019		December 31, 2018
	(In thousands)
Raw materials	$	28,871	$	3,427
Finished goods		206,618		240,444
Total	$	235,489	$	243,871

The Company records provisions for excess and obsolete inventory based on assumptions about future demand and market conditions and the amounts incurred were $3.9 million, $2.9 million and $2.9 million for the years ended December 31, 2019, 2018 and 2017, respectively. 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.

	As of
	December 31, 2019			December 31, 2018
	(In thousands)
Computer equipment	$	9,883		$	9,205
Furniture, fixtures and leasehold improvements		18,623			18,286
Software		27,865			28,065
Machinery and equipment		59,637			60,552
Total property and equipment, gross		116,008			116,108
Accumulated depreciation and amortization		(98,325	)		(95,931	)
Total	$	17,683		$	20,177

Depreciation and amortization expense pertaining to property and equipment was $12.3 million, $10.5 million and $11.5 million for the years ended December 31, 2019, 2018 and 2017, respectively.

	As of December 31, 2019							As of December 31, 2018
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(In thousands)
Technology	$	59,799	$	(57,406	)	$	2,393	$	59,799	$	(56,978	)	$	2,821
Customer contracts and relationships		56,800		(50,297	)		6,503		56,800		(44,280	)		12,520
Other		10,345		(9,137	)		1,208		10,345		(8,540	)		1,805
Total	$	126,944	$	(116,840	)	$	10,104	$	126,944	$	(109,798	)	$	17,146

Amortization of purchased intangibles in the years ended December 31, 2019, 2018 and 2017 was $7.0 million, $8.3 million and $11.0 million, respectively. No impairment charges were recorded in the years ended December 31, 2019, 2018 and 2017.

As of December 31, 2019, estimated amortization expense related to finite-lived intangibles for each of the next five years and thereafter is as follows (in thousands):

The changes in the carrying amount of goodwill during the years ended December 31, 2019 and 2018 are as follows:

	Connected Home		SMB		Total
	(In thousands)
As of December 31, 2017	$	28,035	$	36,279	$	64,314
Goodwill from acquisition of Meural		16,407		-		16,407
As of December 31, 2018	$	44,442	$	36,279	$	80,721
As of December 31, 2019	$	44,442	$	36,279	$	80,721

The Company identified the reporting units for the purpose of goodwill impairment testing as Connected Home, and SMB and performed a qualitative test for goodwill impairment of the two reporting units as of the first day of the fourth quarter, or September 30, 2019. Based upon the results of the qualitative testing, the respective fair values of the two reporting units were substantially in excess of these reporting units’ carrying values. The Company believes that it is more-likely-than-not that the fair value of these reporting units are greater than their respective carrying values and therefore performing the next step of impairment test for these reporting units was unnecessary. No goodwill impairment was recognized in the years ended December 31, 2019, 2018 or 2017. Accumulated goodwill impairment charges for the years ended December 31, 2019 and 2018, was $74.2 million and $74.2 million, respectively.

	As of
	December 31, 2019		December 31, 2018
	(In thousands)
Non-current deferred income taxes	$	58,930	$	57,557
Long-term investments		8,147		2,886
Other		7,202		6,990
Total	$	74,279	$	67,433

The total carrying value of equity investments without readily determinable fair values during the years ended December 31, 2019 and 2018 are as follows (in thousands):

Carrying value, as of December 31, 2017	$	4,505
Additions		1,091
Reclassification of original investment in Meural due to acquisition		(1,500	)
Impairment		(1,400	)
Upward adjustments for observable price changes		190
Carrying value, as of December 31, 2018		2,886
Additions		5,484
Downward adjustments for observable price changes		(223	)
Carrying value, as of December 31, 2019	$	8,147

For the equity investments without readily determinable fair values as of December 31, 2019, cumulative downward adjustments for price changes and impairment was $1.6 million and cumulative upward adjustments for price changes was $0.2 million.

	As of
	December 31, 2019		December 31, 2018
	(In thousands)
Current operating lease liabilities	$	9,357	$	—
Sales and marketing		85,605		91,548
Warranty obligations		10,556		14,412
Sales returns⁽¹⁾		52,612		46,318
Freight and duty		5,633		10,586
Other		25,784		36,608
Total	$	189,547	$	199,472