Retirement Plan Costs (Details) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Defined Contribution Plan [Abstract]
Maximum annual contribution per employee, percent	4.00%
Employer matching contribution amount	$ 255,366	$ 146,033

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration