Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Contribution to 401(k) plan	$ 256,309	$ 347,632	$ 313,899
Percentage eligible pay for dollar by dollar fixed match (in hundredths)	1.00%
Employer contribution for each dollar contributed by employee after 1% of eligible pay	$ 0.5
Maximum percentage of employee gross pay employer can contribute under 401(k) plan (in hundredths)	5.00%
Employee contribution limit for employees under 50 years of age	$ 18,000	18,000	17,500
Employee contribution limit for employees of 50 years of age or older	$ 24,000	$ 24,000	$ 23,000