Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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

The weighted average grant date fair value of all stock options granted during the nine months ended September 30, 2015 was $12.31. This was determined using the Black-Scholes option-pricing model with the following weighted-average assumptions:

Dividend yield	0.0	%
Expected life	10 Years
Expected volatility	81.7	%
Risk-free interest
rate	1.54	%

Officer and Employee Plans [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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

A summary of the status of these stock option plans is presented in the following table:

			Weighted
			Average
			Exercisable
	Number		Price
Outstanding at December 31, 2014		483,629	$	10.20
Granted		52,689		15.05
Exercised		(13,542)		9.89
Forfeited		(2,139)		11.94
Share conversion		23,468		9.71
Retained by Cornerstone shareholders in merger		285,209		11.22
Outstanding at September 30, 2015		829,314	$	10.57

Board Of Directors Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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

Information pertaining to options outstanding at September 30, 2015, is as follows:

		Options Outstanding					Options Exercisable
				Weighted-
				Average	Weighted-				Weighted-
		Number		Remaining	Average		Number		Average
		Outstanding		Contractual	Exercise		Exercisable		Exercise
Exercise Prices		at 9/30/2015		Life	Price		at 9/30/2015		Price
$	4.08		1,250	6.1 years	$	4.08		1,250	$	4.08
	4.40		1,250	5.9 years		4.40		1,250		4.40
	6.20		750	5.5 years		4.40		750		6.20
	6.60		64,800	6.5 years		6.60		64,800		6.60
	6.80		40,500	5.4 years		6.80		40,500		6.80
	9.48		58,350	7.5 years		9.48		58,350		9.48
	9.52		407,400	1.7 years		9.52		407,400		9.52
	9.60		71,250	8.4 years		9.60		71,250		9.60
	10.00		1,250	7.8 years		10.00		1,250		10.00
	10.48		79,220	4.7 years		10.48		79,220		10.48
	11.67		5,250	5.3 years		11.67		4,200		11.67
	14.29		1,050	2.8 years		14.29		1,050		14.29
	14.40		22,005	3.4 years		14.40		22,005		14.40
	15.05		52,689	10.0 years		15.05		-		15.05
	31.96		14,454	2.4 years		31.96		14,454		31.96
	53.00		4,200	0.4 years		53.00		4,200		53.00
	60.80		688	1.6 years		60.80		688		60.80
	61.00		2,958	1.4 years		61.00		2,958		61.00
	Outstanding, end of year		829,314	2.4 years		10.57		775,575		10.27

Information related to non-vested options for the period ended September 30, 2015, is as follows:

			Weighted
			Average
			Grant-Date
	Number		Fair Value
Nonvested at December 31, 2014		7,358	$	2.16
Granted		52,689		12.31
Vested		(6,439)		2.05
Forfeited/expired		(237)		2.02
Share conversion		368		2.17
Nonvested at September 30, 2015		53,739	$	12.12