Note 2 - Cash, Cash Equivalents and Marketable Investments

3 Months Ended

Mar. 31, 2015

Disclosure Text Block Supplement [Abstract]

Cash, Cash Equivalents, and Marketable Securities [Text Block]

Note 2. Cash, Cash Equivalents and Marketable Investments

The Company invests its cash primarily in money market funds, commercial paper, corporate notes and bonds, municipal bonds, and debt securities issued by the U.S. government and its agencies. The Company considers all highly liquid investments, with an original maturity of three months or less at the time of purchase, to be cash equivalents. Investments with maturities of greater than three months at the time of purchase are accounted for as “available-for-sale,” are carried at fair value with unrealized gains and losses reported as a component of stockholders’ equity, are held for use in current operations and are classified in current assets as “marketable investments.”

The following tables summarize the components, and the unrealized gains and losses position, related to the Company’s cash, cash equivalents and marketable investments (in thousands):

March 31, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Cash and cash equivalents:
Cash	$	6,553	$	—	$	—		$	6,553
Money market funds		3,759		—		—			3,759
Commercial paper		3,150		—		—			3,150
Total cash and cash equivalents		13,462		—		—			13,462
Marketable investments:
U.S. government notes		14,320		35		—			14,355
U.S. government agencies		18,259		34		(3	)		18,290
Municipal securities		3,914		3		(3	)		3,914
Commercial paper		10,735		4		—			10,739
Corporate debt securities		15,280		19		(2	)		15,297
Total marketable investments		62,508		95		(8	)		62,595
Total cash, cash equivalents and marketable investments	$	75,970	$	95	$	(8	)	$	76,057

December 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Cash and cash equivalents:
Cash	$	7,761	$	—	$	—		$	7,761
Money market funds		242		—		—			242
Commercial paper		1,800		—		—			1,800
Total cash and cash equivalents		9,803		—		—			9,803
Marketable investments:
U.S. government notes		18,345		17		(1	)		18,361
U.S. government agencies		19,768		33		(1	)		19,800
Municipal securities		3,607		3		(3	)		3,607
Commercial paper		10,693		2		—			10,695
Corporate debt securities		18,875		13		(8	)		18,880
Total marketable investments		71,288		68		(13	)		71,343
Total cash, cash equivalents and marketable investments	$	81,091	$	68	$	(13	)	$	81,146

As of March 31, 2015 and December 31, 2014, total gross unrealized losses were $8,000 and $13,000, respectively, and were related to interest rate changes on available-for-sale marketable investments. The Company has concluded that it is more-likely-than-not that the securities will be held until maturity or the recovery of their cost basis. No securities were in an unrealized loss position for more than 12 months.

The following table summarizes the contractual maturities of the Company’s available-for-sale securities, classified as marketable investments as of March 31, 2015 (in thousands):

	Amount
Due in less than one year	$	34,249
Due in 1 to 3 years		28,346
	$	62,595