Note 16 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	Number of shares
	Incentive Stock Option			Non-Incentive Stock Option			Weighted Average Exercise Price
Balance outstanding as of January 1, 2016		91,500			57,500			19.58
Granted		-			-			-
Exercised		(11,500	)		(5,000	)		5.20
Forfeited		(20,000	)		(2,500	)		28.34
Balance outstanding as of December 31, 2016		60,000			50,000			19.95
Granted		-			-			-
Exercised		(3,000	)		-			5.19
Forfeited		(11,000	)		(25,000	)		29.48
Balance outstanding as of December 31, 2017		46,000			25,000			15.74
Granted		-			-			-
Exercised		(13,500	)		(10,000	)		7.07
Forfeited		(20,000	)		(10,000	)		28.71
Balance outstanding as of December 31, 2018		12,500			5,000		$	5.14
Options exercisable as of December 31, 2018		12,500			5,000		$	5.14

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Number of shares			Weighted Average Grant- Fair Value
Balance of shares non-vested as of January 1, 2016		43,477			12.75
Granted		24,679			15.01
Vested		(7,201	)		13.13
Forfeited		-			-
Balance of shares non-vested as of December 31, 2016		60,955			13.62
Granted		13,386			20.33
Vested		(28,791	)		12.29
Forfeited		-			-
Balance of shares non-vested as of December 31, 2017		45,550			16.44
Granted		13,338			22.41
Vested		(26,539	)		16.40
Forfeited		-			-
Balance of shares non-vested as of December 31, 2018		32,349		$	18.93

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

	Performance Stock Units			Weighted Average Grant-Date Fair Value
Balance of shares non-vested as of January 1, 2017		-		$	-
Granted		55,823			20.48
Vested		-			-
Forfeited		-			-
Balance of shares non-vested as of December 31, 2017		55,823			20.48
Granted		-			-
Vested		-			-
Forfeited		(8,501	)		20.48
Balance of shares non-vested as of December 31, 2018		47,322		$	20.48