Note 3 - Earnings Per Share (Detail) - Basic and diluted earnings per share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income (in Dollars)	$ 718	$ 509	$ 1,025	$ 762
Shares used in basic net income per share calculation	20,134	20,012	20,125	19,826
Employee stock options	2,186	1,644	2,181	1,561
Shares used in diluted net income per common share calculation	22,320	21,656	22,306	21,387
Basic net income per common share (in Dollars per share)	$ 0.04	$ 0.03	$ 0.05	$ 0.04
Diluted net income per common share (in Dollars per share)	$ 0.03	$ 0.02	$ 0.05	$ 0.04