6. Cash, Cash Equivalents and Marketable Securities

Cash, cash equivalents and marketable securities consist of the following (in thousands):


	December 31, 2011		December 31, 2010
Cash and cash equivalents:
Cash	$	19,109	$	10,839
Money market funds		19,829		55,465

Total cash and cash equivalents		38,938		66,304


Marketable securities:
Corporate debt securities		—		19,324
Commercial paper		—		12,696

Total marketable securities		—		32,020

Total cash, cash equivalents and marketable securities	$	38,938	$	98,324

The following tables summarize the unrealized gains and losses related to the Company's investments in marketable securities designated as available-for-sale as follows as of December 31, 2010 (in thousands):


As of December 31, 2010	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Aggregate Fair Value

Corporate debt securities	$	19,302	$	25	$	(3	)	$	19,324
Commercial paper		12,696		—		—			12,696

Total	$	31,998	$	25	$	(3	)	$	32,020

As of December 31, 2011, the Company did not hold any marketable securities and therefore there were no unrealized gains or losses. In addition, the Company did not experience any significant realized gains or losses on its investments through December 31, 2011. The Company generally reviews investments held with unrealized losses to determine if the loss is other-than-temporary. As of December 31, 2010, the Company determined that it had the ability and intent to hold these investments for a period of time sufficient for a recovery of fair market value and did not consider the investments to be other-than-temporarily impaired. The Company's money market funds maintained a net asset value of $1.00 for all periods presented. Net unrealized gains/losses are recorded to other comprehensive income (loss) in the Company's consolidated balance sheets.