Note 8 - Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

	Three Months Ended March 31,
	2015		2014
Weighted average number of shares used in computation of basic earnings per share		47,244		45,479
Add:
Additional shares from the assumed exercise of employee stock options		835		181
Weighted average number of shares used in computation of diluted earnings per share		48,079		45,660