Note 7 - Income Per Share - Weighted Average Number of Shares Used to Compute Net EPS (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Weighted average common shares outstanding, basic (in shares)	7,225	7,131	7,213	7,108
Weighted average common equivalent shares due to stock options and RSUs (in shares)	87	99	81	104
Weighted average common shares outstanding, diluted (in shares)	7,312	7,230	7,294	7,212