Employee Benefits (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, maximum annual contribution per employee, percent	100.00%
Defined contribution plan, minimum annual contribution per employee, percent	1.00%
Defined contribution plan, maximum annual contribution per employee	$ 18,000	$ 18,000	$ 17,500
Defined contribution plan, cost recognized	228,619	172,965	126,600
Catchup Contribution Max
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, maximum annual contribution per employee	$ 6,000	$ 6,000	$ 5,500
Tranche one
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match	100.00%
Defined contribution plan, percentage of participant contribution	3.00%
Tranche two
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match	50.00%
Defined contribution plan, percentage of participant contribution	2.00%