Note 4 - Cash, Cash Equivalents and Short-Term Investments (Tables)

9 Months Ended

Sep. 30, 2012

Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block]

	Amortized Cost		Gross Unrealized Gains		Estimated Fair Value
Cash	$	4,045	$	—	$	4,045
Money market account		3,036		—		3,036
Cash and cash equivalents	$	7,081	$	—	$	7,081

	Amortized Cost		Gross Unrealized Gains		Estimated Fair Value
U.S. Treasury bills	$	15,068	$	3	$	15,071
Short-Term investments	$	15,068	$	3	$	15,071

	Amortized Cost		Gross Unrealized Gains		Estimated Fair Value
Cash	$	2,373	$	—	$	2,373
Money market account		5,585		—		5,585
Cash and cash equivalents	$	7,958	$	—	$	7,958

	Amortized Cost		Gross Unrealized Gains		Estimated Fair Value
U.S. Treasury bills	$	10,183	$	6	$	10,189
Certificate of Deposit		4,958		2		4,960
Short-Term investments	$	15,141	$	8	$	15,149