Accrued Liabilities (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Accrued Liabilities [Abstract]
Salaries, employee benefits and related taxes	$ 1,389,200	$ 1,406,300
Retention Payable	2,233,000	0
Professional fees	286,700	224,500
Grants Receivable, Current	2,445,900	0
Other	1,456,100	1,028,600
Accrued Liabilities	$ 7,810,900	$ 2,659,400