Note 4 - Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

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

	Three months ended				Nine months ended
	September 30,				September 30,
	2017		2016		2017		2016
Net income	$	7,853,935	$	6,107,501	$	25,804,917	$	19,157,457
Basic EPS	$	0.60	$	0.47	$	1.96	$	1.55
Diluted EPS	$	0.58	$	0.46	$	1.91	$	1.52
Weighted average common shares outstanding*		13,151,350		13,066,777		13,151,672		12,398,491
Weighted average common shares issuable upon exercise of stock options and under the employee stock purchase plan		356,605		202,926		357,894		181,551
Weighted average common and common equivalent shares outstanding		13,507,955		13,269,703		13,509,566		12,580,042