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

9 Months Ended

Sep. 30, 2015

Notes Tables

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

	Three Months				Nine Months
	Ended September 30,				Ended September 30,
	2015		2014		2015		2014
Net earnings used in the computation of basic and diluted earnings per share	$	4,031,000	$	3,368,000	$	9,698,000	$	8,493,000
Weighted average shares outstanding - basic		13,833,561		13,375,566		13,716,376		13,237,438
Common stock equivalents		752,127		628,636		853,995		498,056
Weighted average shares outstanding - diluted		14,585,688		14,004,202		14,570,371		13,735,494
Per Share Data :
Basic
Net earnings	$	0.29	$	0.25	$	0.71	$	0.64
Diluted
Net earnings	$	0.28	$	0.24	$	0.67	$	0.62

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

	No. of			Weighted Average
	Shares			Exercise Price
Outstanding December 31, 2014		1,118,058		$	6.63
Granted		153,618		$	18.11
Exercised		(255,332	)	$	7.03
Lapsed		(5,900	)	$	5.64
Cancelled		(520	)	$	17.40
Outstanding September 30, 2015		1,009,924		$	8.27

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

	No. of			Weighted Average
	Shares			Exercise Price
Outstanding December 31, 2014		522,024		$	6.17
Granted		53,292		$	18.66
Exercised		(193,750	)	$	5.73
Lapsed		-			-
Cancelled		-			-
Outstanding September 30, 2015		381,566		$	8.14

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

	Three Months Ended September 30,
	SARS	Options
Exercise price
2015	N/A	$	17.40
2014	N/A	$	10.38
Market price
2015	N/A	$	17.40
2014	N/A	$	10.38
Risk free interest rate (1)
2015	N/A		1.6	%
2014	N/A		1.8	%
Expected award life (years) (2)	N/A		5
Expected volatility (3)
2015	N/A		36.8	%
2014	N/A		37.4	%
Expected dividend yield (4)
2015	N/A		1.9	%
2014	N/A		2.9	%

	Nine Months Ended September 30,
	SARS			Options
Exercise price
2015	$	18.66		$16.78	-	18.66
2014	$	7.36		$7.36	-	10.38
Market price
2015	$	18.66		$16.78	-	18.66
2014	$	7.36		$7.36	-	10.38
Risk free interest rate (1)
2015		1.5	%	1.5%	-	2.1%
2014		1.5	%	1.5%	-	2.6%
Expected award life (years) (2)		5		5	-	10
Expected volatility (3)
2015		34.9	%	34.9%	-	39.0%
2014		42.5	%	37.3%	-	42.5%
Expected dividend yield (4)
2015		1.6	%	1.6%	-	1.9%
2014		3.7	%	2.9%	-	3.7%