Cash and Cash Equivalents and Short-Term Investments (Tables)

6 Months Ended

Jun. 30, 2012

Cash and Cash Equivalents and Short-Term Investments [Abstract]

cash, cash equivalents and short-term investments

	June 30, 2012									December 31, 2011
	Amortized		Gross Unrealized					Estimated		Amortized		Gross Unrealized					Estimated
	Cost		Gains		Losses			Fair Value		Cost		Gains		Losses			Fair Value
Operating cash	$	184	$	—	$	—		$	184	$	53	$	—	$	—		$	53
Money market funds		6,330		—		—			6,330		3,855		—		—			3,855
Government sponsored enterprise		15,189		—		(1	)		15,188		23,900		2		(1	)		23,901
U.S. Treasury securities		—		—		—			—		6,500		—		—			6,500
	$	21,703	$	—	$	(1	)	$	21,702	$	34,308	$	2	$	(1	)	$	34,309
Reported as:
Cash and cash equivalents								$	6,514								$	9,148
Short term investments									15,188									25,161
								$	21,702								$	34,309