Note 8 - Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Weighted average number of shares used in computation of basic earnings per share		49,023		45,690		48,388		45,594
Add:
Additional shares from the assumed exercise of employee stock options		2,090		412		1,626		323
Weighted average number of shares used in computation of diluted earnings per share		51,113		46,102		50,014		45,917