Cash, Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2013

Cash And Cash Equivalents [Abstract]

Cash, Cash Equivalents and Investments

Cash, cash equivalents and investments as of March 31, 2013 consist of the following:

	March 31, 2013
Description	Contracted Maturity	Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash	Demand	$	11,827	$	11,827	$	11,827
Money market funds	Demand		8,266		8,266		8,266
Total cash and cash equivalents		$	20,093	$	20,093	$	20,093
Certificates of deposit	21 – 200 days	$	1,200	$	1,200	$	1,200
Commercial paper	10 days		700		700		700
Corporate debentures	30 – 302 days		4,938		4,948		4,938
Total short-term investments		$	6,838	$	6,848	$	6,838
Certificates of deposit	385 – 438 days	$	960	$	962	$	960
Corporate debentures	371 days		701		703		701
Total long-term investments		$	1,661	$	1,665	$	1,661

Cash, cash equivalents and investments as of December 31, 2012 consist of the following:

	December 31, 2012
Description	Contracted Maturity	Amortized Cost		Fair Market Value		Balance Per Balance Sheet
Cash	Demand	$	15,275	$	15,275	$	15,275
Money market funds	Demand		6,433		6,433		6,433
Total cash and cash equivalents		$	21,708	$	21,708	$	21,708
Certificates of deposit	111 – 290 days	$	1,200	$	1,200	$	1,200
Commercial paper	52 – 100 days		1,397		1,399		1,397
Corporate debentures	21 – 342 days		5,667		5,673		5,667
Total short-term investments		$	8,264	$	8,272	$	8,264
Certificates of deposit	475 – 528 days	$	960	$	962	$	960
Corporate debentures	388 – 461 days		2,109		2,118		2,109
Total long-term investments		$	3,069	$	3,080	$	3,069