Note 5 - Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three months ended				Nine months ended
	September 30,				September 30,
	2016		2015		2016		2015
Net income	$	6,107,501	$	6,488,987	$	19,157,457	$	10,143,058
Basic EPS	$	0.47	$	0.55	$	1.55	$	1.03
Diluted EPS	$	0.46	$	0.55	$	1.52	$	1.01
Weighted average common shares outstanding*		13,066,777		11,713,993		12,398,491		9,878,882
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan		202,926		161,937		181,551		145,559
Weighted average common and common equivalent shares outstanding		13,269,703		11,875,930		12,580,042		10,024,441