Note 2 - Net Income per Share (Detail) - Net Income Per Basic and Diluted Share (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Estimated tax on interest expense for convertible notes (in Dollars)	$ 4	$ 500	$ 21	$ 1,800