Retirement Plan (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Retirement Plan [Abstract]
401(k) employer contribution	$ 47,834	$ 48,999	$ 130,550	$ 170,619