Note 8 - Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Weighted average number of shares used in computation of basic earnings per share		50,623		49,771		50,618		49,726
Add:
Additional shares from the assumed exercise of employee stock options		335		853		383		833
Weighted average number of shares used in computation of diluted earnings per share		50,958		50,624		51,001		50,559