SHORT-TERM INVESTMENTS

Available-for-sale investments as of December 31, 2012 were as follows:



(In thousands)	Cost basis		Gross unrealized gains		Gross unrealized losses			Fair value
Commercial paper	$	19,999	$	—	$	(4	)	$	19,995
Total available-for-sale investments	$	19,999	$	—	$	(4	)	$	19,995

Investments with continuous unrealized losses for less than 12 months and their related fair values as of December 31, 2012 were as follows:



	Less than 12 months
(In thousands)	Fair value		Gross unrealized losses
Commercial paper	$	19,995	$	(4	)
Total	$	19,995	$	(4	)

Unrealized losses from corporate bonds are primarily attributable to general changes in interest rates and market conditions. Management does not believe the unrealized losses represent other-than-temporary impairments based on our evaluation of available evidence as of December 31, 2012.

The amortized cost and fair value of available-for-sale investments as of December 31, 2012, by contractual maturity, were as follows:



(In thousands)	Cost basis		Fair value
Due in 1 year or less	$	19,999	$	19,995
Total	$	19,999	$	19,995