Marketable Securities

6 Months Ended

Jun. 30, 2013

Marketable Securities

Marketable Securities

3. Marketable Securities

Our marketable securities held as of June 30, 2013 are summarized below:

	AmortizedCost		GrossUnrealizedGains		GrossUnrealizedLosses			EstimatedFairValue
U.S. government agency securities	$	3,999,000	$	—	$	(3,000	)	$	3,996,000
Corporate debt securities:
Financial	21,944,000		—		(21,000		)	21,923,000
Industrial	4,017,000		—		(4,000		)	4,013,000
Other	2,027,000		—		(3,000		)	2,024,000
Total available-for-sale securities	$	31,987,000	$	—	$	(31,000	)	$	31,956,000

There were no realized gains or losses from the sale of marketable securities during the three and six months ended June 30, 2013 or 2012.

The maturities of our marketable securities available-for-sale as of June 30, 2013 are as follows:

	AmortizedCost		Estimated Fair Value
Mature in one year or less	$	21,749,000	$	21,734,000
Mature after one year through two years	10,238,000		10,222,000
	$	31,987,000	$	31,956,000