3. Investments

At December 31, 2012, the amortized cost and fair value of investments, with gross unrealized gains and losses, were as follows:


(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	5,923	$	—	$	—	$	5,923
U.S. government-backed securities		9,347		4		—		9,351

Total investments	$	15,270	$	4	$	—	$	15,274

Reported as:
Cash and cash equivalents							$	5,718
Marketable securities								9,351
Restricted cash								205

Total investments							$	15,274

At December 31, 2011, the amortized cost and fair value of investments, with gross unrealized gains and losses, were as follows:


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Money market funds	$	2,973	$	—	$	—		$	2,973
Corporate securities		6,024		—		(2	)		6,022
U.S. government-backed securities		5,435		1		—			5,436
U.S. treasury notes		3,051		—		—			3,051

Total investments	$	17,483	$	1	$	(2	)	$	17,482

Reported as:
Cash and cash equivalents								$	2,768
Marketable securities									14,509
Restricted cash									205

Total investments								$	17,482

As of December 31, 2012, all securities had remaining contractual maturities of less than one year.