Note 11 - Income Taxes (Details) - Effective Tax Rate Table (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Effective Tax Rate Table [Abstract]
Income before income tax provision	$ 6,645	$ 7,779	$ 12,935	$ 15,475
Income tax provision	$ 1,671	$ 2,094	$ 3,255	$ 4,203
Effective tax rate	25.15%	26.92%	25.16%	27.16%