Employee Benefit Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Employee Benefit Plan (Textual)
Percentage match of employee contributions			30.00%
Annual maximum amount of company match per employee			$ 2,100	$ 2,100
Benefit plan contribution recorded with general and administrative expenses	$ 100,000	$ 100,000	$ 300,000	$ 200,000