Property and Equipment (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Property and Equipment (Textual)
Depreciation expense	$ 971,112	$ 869,035	$ 1,939,302	$ 1,824,315
Depreciation included in cost of revenues and operating expenses	$ 702,000	$ 731,000	$ 1,402,000	$ 1,548,000