Condensed Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 11,692,360	$ 14,155,809
Prepaid expenses	858,128	931,461
Other current assets	23,624	161,436
Total current assets	12,574,112	15,248,706
Other assets	47,117	53,023
Total assets	12,621,229	15,301,729
Current Liabilities:
Accounts payable and accrued expenses	1,353,147	1,011,629
Accrued compensation	424,597	697,245
Other current liabilities	9,015	12,313
Current portion of long-term debt	712,930	150,430
Total current liabilities	2,499,689	1,871,617
Long-term debt, net of current portion	3,688,216	4,241,448
Total liabilities	6,187,905	6,113,065
Stockholders' equity:
Common stock, $0.0001 par value; authorized shares — 50,000,000; issued and outstanding shares - 6,198,967 and 6,112,091 at March 31, 2015 and December 31, 2014, respectively	620	611
Additional paid-in capital	45,892,601	45,127,202
Accumulated deficit	(39,459,897)	(35,939,149)
Total stockholders' equity	6,433,324	9,188,664
Total liabilities and stockholders' equity	$ 12,621,229	$ 15,301,729