Note 4 - Cash, Cash Equivalents and Short-Term Investments

9 Months Ended

Sep. 30, 2012

Cash and Cash Equivalents Disclosure [Text Block]

Note 4: Cash, Cash Equivalents and Short-Term Investments

At September 30, 2012, cash, cash equivalents, and short-term investments consisted of the following:

	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

At December 31, 2011, cash, cash equivalents, and short-term investments consisted of the following:

	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

Our U.S. Treasury bills and certificates of deposit are classified as held-to-maturity and the U.S. Treasury bills are carried at amortized cost. The estimated fair value of the U.S. Treasury bills is based on quoted market prices for identical investments and we classify these investments within the fair value hierarchy as a Level 1 asset. The estimated fair value of the certificate of deposit is based on a CD pricing model and we classify this investment within the fair value hierarchy as a Level 2 asset. All of our investments have contractual maturities of one year or less.

We have not realized any gains or losses on our short-term investments in the periods presented.