Investments

Marketable Securities

All of the Company's marketable securities at March 31, 2014, and December 31, 2013, were classified as "available-for-sale" securities, with changes in fair value recognized in stockholders' equity as "other comprehensive income (loss)". Marketable securities at March 31, 2014, consisted of the following:



	Cost			Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Short-term deposits	$	41,035		$	—	$	—		$	41,035
Mutual funds	15,722			4,945		—			20,667
United States government securities	23,889			26		—			23,915
Corporate securities	105,272			13,881		(3,957		)	115,196
Corporate obligations	35,949			1,642		(3		)	37,588
Commercial paper	4,499			—		—			4,499
Total available-for-sale securities	226,366			20,494		(3,960		)	242,900
Amounts classified as cash equivalents	(43,935		)	—		—			(43,935		)
Amounts classified as marketable securities	$	182,431		$	20,494	$	(3,960	)	$	198,965

Marketable securities at December 31, 2013, consisted of the following:



	Cost			Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Short-term deposits	$	60,909		$	—	$	—		$	60,909
Mutual funds	15,722			5,061		—			20,783
United States government securities	50,356			23		—			50,379
Corporate securities	69,806			9,961		(5,208		)	74,559
Corporate obligations	31,356			885		(276		)	31,965
Commercial paper	1,799			—		—			1,799
Total available-for-sale securities	229,948			15,930		(5,484		)	240,394
Amounts classified as cash equivalents	(61,909		)	—		—			(61,909		)
Amounts classified as marketable securities	$	168,039		$	15,930	$	(5,484	)	$	178,485

Proceeds from sales of marketable securities were $40.6 million and $8.3 million for the three months ended March 31, 2014 and 2013, respectively. The company determines gains and losses from sales of marketable securities based on specific identification of the securities sold. Gross realized gains and losses from sales of marketable securities, all of which are reported as a component of "Other income (expense), net" in the consolidated statements of operations for the three months ended March 31, 2014 and 2013, were as follows:



	Three Months Ended March 31,
	2014			2013
	(in thousands)
Gross realized gains	$	3,200		$	1,258
Gross realized losses	(209		)	(42		)
Realized gains, net	$	2,991		$	1,216

The fair value of the Company’s marketable securities with unrealized losses at March 31, 2014, and the duration of time that such losses had been unrealized, were as follows:



	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
Corporate securities	$	30,339	$	(3,299	)	$	551	$	(658	)	$	30,890	$	(3,957	)
Corporate obligations	1,045		(3		)	—		—			1,045		(3		)
Total	$	31,384	$	(3,302	)	$	551	$	(658	)	$	31,935	$	(3,960	)

The fair value of the Company’s marketable securities with unrealized losses at December 31, 2013, and the duration of time that such losses had been unrealized, were as follows:



	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
Corporate securities	$	15,609	$	(4,757	)	$	803	$	(451	)	$	16,412	$	(5,208	)
Corporate obligations	10,477		(276		)	—		—			10,477		(276		)
Total	$	26,086	$	(5,033	)	$	803	$	(451	)	$	26,889	$	(5,484	)

Gross unrealized losses primarily related to losses on corporate securities. The Company has evaluated such securities, which primarily consist of investments in publicly-traded entities, as of March 31, 2014, and has determined that there was no indication of other-than-temporary impairments. This determination was based on several factors, including the length of time and extent to which fair value has been less than the cost basis, the financial condition and near-term prospects of the entity, and the Company's intent and ability to hold the corporate securities for a period of time sufficient to allow for any anticipated recovery in market value.

The amortized cost and estimated fair value of available-for-sale debt securities at March 31, 2014, by contractual maturity, were as follows:



	Cost		Estimated Fair Value
	(in thousands)
Debt securities:
Mature in one year or less	$	9,029	$	9,030
Mature after one year through three years	21,681		21,812
Mature in more than three years	33,627		35,160
Total debt securities	64,337		66,002
Securities with no contractual maturities	162,029		176,898
Total	$	226,366	$	242,900

Equity-Method Investments

In January 2013, the Company acquired a 40% membership interest in Again Faster LLC, a fitness equipment company, for total cash consideration of $4.0 million. In August 2013, the Company acquired 1,316,866 shares of the common stock of iGo, Inc. (“iGo”), in a cash tender offer for total consideration of $5.2 million. The shares of common stock of iGo acquired by the Company represent approximately 44.7% of the issued and outstanding shares of iGo.

The following table summarizes the Company's equity method investments.



	Ownership				Carrying Value				Income (Loss) Recognized
									Three Months Ended
	March 31, 2014		December 31, 2013		March 31, 2014		December 31, 2013		March 31, 2014			March 31, 2013
					(in thousands)
Again Faster	40.0	%	40.0	%	$	3,542	$	3,671	$	(129	)	$	—
iGo	44.7	%	44.7	%	3,364		4,668		(1,304		)	—
Total					$	6,906	$	8,339	$	(1,433	)	$	—

Based on the closing market price of iGo’s publicly-traded shares, the value of the Company’s investment in iGo was approximately $4.1 million at March 31, 2014.

The Company recognizes its equity in the losses of iGo on a one-quarter lag basis. The following table presents summarized income statement information for iGo for the three months ended December 31, 2013, the period on which the loss recognized by the Company for the three months ended March 31, 2014, was based.



	Amount
	(in thousands)
Revenues	$	3,210
Gross loss	$	(1,146	)
Net loss	$	(2,917	)

Other Investments

The Company's other investments at March 31, 2014, include a $25.0 million cost-method investment in a limited partnership that co-invested with other private investment funds in a public company. The investment in the limited partnership had an approximate fair value of $28.5 million at March 31, 2014, based on the net asset value indicated in the monthly statement received from the partnership. The Company's other investments at March 31, 2014, also include investments in two venture capital funds totaling $0.8 million and a promissory note with an amortized cost of $3.0 million, which is a reasonable approximation of fair value at March 31, 2014.