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Note 4 - Cash and Cash Equivalents and Short-term Investments (Tables)

12 Months Ended

Dec. 31, 2012

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

		As of December 31, 2012
		Total Fair Value				Level 1				Level 2				Gross Unrealized Gains (pre-tax)				Gross Unrealized Losses (pre-tax)
Mutual funds		$	27,582			$	27,582			$	--			$	337			$	9
Municipal bonds			21,629				--				21,629				862				128
Total securities available-for-sale		$	49,211			$	27,582			$	21,629			$	1,199			$	137

		As of December 31, 2011
		Total Fair Value				Level 1				Level 2				Gross Unrealized Gains (pre-tax)				Gross Unrealized Losses (pre-tax)
Mutual funds		$	24,851			$	24,851			$	--			$	383			$	--
Municipal bonds			20,004				--				20,004				617				15
Total securities available-for-sale		$	44,855			$	24,851			$	20,004			$	1,000			$	15