Note 1 - Summary of Significant Interim Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Net earnings used in the computation of basic and diluted earnings per share	$	3,075,042	$	3,624,000	$	5,335,443	$	5,667,000
Weighted average shares outstanding - basic		14,120,617		13,730,646		14,023,840		13,657,784
Common stock equivalents		836,852		846,696		789,224		904,929
Weighted average shares outstanding - diluted		14,957,469		14,577,342		14,813,064		14,562,713
Per Share Data:
Basic
Net earnings	$	0.22	$	0.26	$	0.38	$	0.41
Diluted
Net earnings	$	0.21	$	0.25	$	0.36	$	0.39

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	No. of Shares			Weighted Average Exercise Price
Outstanding December 31,		946,546		$	8.39
Granted		120,332		$	16.55
Exercised		(141,022	)	$	6.97
Lapsed		(1,592	)	$	5.62
Cancelled		(660	)	$	14.21
Outstanding June 30, 2016		923,604		$	9.67

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity [Table Text Block]

	No. of Shares			Weighted Average Exercise Price
Outstanding December 31,		381,566		$	8.14
Granted		58,108			16.35
Exercised		(75,792	)		6.12
Lapsed		-			-
Cancelled		-			-
Outstanding June 30, 2016		363,882		$	9.87

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Three months ended
June 30,	SARS		Options
Exercise price
2016		N/A	$	18.55
2015		N/A	$	16.78
Market price
2016		N/A		18.55
2015		N/A	$	16.78
Risk free interest rate 1
2016		N/A		1.8	%
2015		N/A		2.1	%
Expected award life (years) 2		N/A		10
Expected volatility 3
2016		N/A		40.3	%
2015		N/A		39.0	%
Expected dividend yield 4
2016		N/A		1.8	%
2015		N/A		1.8	%

Six months ended June 30,	SARS			Options
Exercise price
2016	$	16.35		$16.35	-	$18.55
2015	$	18.66		$16.78	-	$18.66
Market price
2016	$	16.35		$16.35	-	$18.55
2015	$	18.66		$16.78	-	$18.66
Risk free interest rate 1
2016		1.3	%	1.3%	-	1.8%
2015		1.5	%	1.5%	-	2.1%
Expected award life (years) 2		5		5	-	10
Expected volatility 3
2016		36.5	%	36.5%	-	40.3%
2015		34.9	%	34.9%	-	39.0%
Expected dividend yield 4
2016		2.0	%	1.8%	-	2.0%
2015		1.6	%	1.6%	-	1.8%