Investments

6 Months Ended

Jun. 30, 2013

Investments

Note 3. Investments:

Our investments at June 30, 2013 were comprised of the following:

	Cost basis		Unrealized gains		Unrealized losses			Recorded basis		Cash and cash equivalents		Short term investments
Assets
Cash	$	28,674	$	—	$	—		$	28,674	$	28,674	$	—
Money market funds		15,320		—		—			15,320		15,320		—
Commercial paper		14,599		—		(1	)		14,598		—		14,598
Corporate bonds and notes		24,784		—		(79	)		24,705		—		24,705
	$	83,377	$	—	$	(80	)	$	83,297	$	43,994	$	39,303

Investments with continuous unrealized losses for less than twelve months and their related fair values at June 30, 2013 were as follows:

	Fair value		Unrealized losses
Commercial paper	$	14,598	$	(1	)
Corporate bonds and notes		24,705		(79	)
	$	39,303	$	(80	)

Unrealized losses from fixed-income securities are primarily attributable to changes in interest rates. Because we do not currently intend to sell these investments, and it is not more likely than not that we will be required to sell our investments before recovery of their amortized cost basis, which may be maturity, we do not consider these investments to be other-than-temporarily impaired at June 30, 2013.

The original cost and estimated current fair value of our fixed-income securities at June 30, 2013 are set forth below.

	Cost basis		Estimated fair value
Due in one year or less	$	24,112	$	24,101
Due between one and five years		15,271		15,202
	$	39,383	$	39,303