Note 5 - Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share

Schedule of computation of earnings per share on a basic and diluted basis

		Three months ended			Six months ended
		June 30,			June 30,
		2018		2017		2018		2017
Net income	$	10,445,385	$	8,766,017	$	20,995,346	$	17,950,982
Basic EPS	$	0.75	$	0.67	$	1.51	$	1.36
Diluted EPS	$	0.73	$	0.65	$	1.48	$	1.33
Weighted average common shares outstanding		13,919,565		13,170,283		13,904,113		13,151,833
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan		312,858		346,309		314,890		350,672
Weighted average common and common equivalent shares outstanding		14,232,423		13,516,592		14,219,003		13,502,505