Note 13 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of 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, 2014		168,100			121,000			16.54
Granted		-			-			-
Exercised		(25,100	)		(14,500	)		5.33
Forfeited		(2,700	)		(24,000	)		19.03
Balance outstanding as of December 31, 2014		140,300			82,500			18.23
Granted		-			-			-
Exercised		(10,800	)		(25,000	)		5.22
Forfeited		(38,000	)		-			25.19
Balance outstanding as of December 31, 2015		91,500			57,500			19.58
Granted		-			-
Exercised		(11,500	)		(5,000	)		5.20
Forfeited		(20,000	)		-			28.28
Balance outstanding as of December 31, 2016		60,000			52,500		$	20.15
Options exercisable as of December 31, 2016		60,000			52,500		$	20.15

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Number of shares			Weighted Average Grant- Date Price
Balance of shares non-vested as of January 1, 2014		27,629		$	7.39
Granted		34,562			10.99
Vested		(31,688	)		8.55
Forfeited		-			-
Balance of shares non-vested as of December 31, 2014		30,503			10.26
Granted		28,951			14.78
Vested		(15,083	)		11.64
Forfeited		(894	)		12.26
Balance of shares non-vested as of December 31, 2015		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