Balance Sheets - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 14,648,866	$ 8,527,304
Marketable securities	12,941,776
Prepaid expenses and other current assets	497,552	232,568
Total current assets	28,088,194	8,759,872
Deferred offering costs	36,236	14,238
Fixed assets, net	80,334	12,993
Total assets	28,204,764	8,787,103
Current liabilities:
Accounts payable	851,160	341,294
Accrued expenses	1,186,429	908,724
Current portion of credit facility	77,546	77,546
Total current liabilities	2,115,135	1,327,564
Credit facility, net of current portion and debt discount	1,211,310	1,175,481
Total liabilities	$ 3,326,445	$ 2,503,045
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock, $0.001 par value, 15,000,000 shares authorized, none issued and outstanding
Common stock, voting, $0.001 par value; 150,000,000 authorized and 9,712,521 and 5,565,415 shares issued and outstanding, respectively	$ 9,713	$ 5,565
Additional paid-in capital	83,478,851	52,790,090
Accumulated other comprehensive loss, net of tax	(8,361)
Accumulated deficit	(58,601,884)	(46,511,597)
Total stockholders' equity	24,878,319	6,284,058
Total liabilities and stockholders' equity	$ 28,204,764	$ 8,787,103