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Balance Sheets - USD ($)
Sep. 30, 2016
Dec. 31, 2015
Current Assets:    
Cash and cash equivalents $ 45,282,550 $ 46,802,560
Prepaid expenses and other current assets 1,239,716 441,810
Total current assets 46,522,266 47,244,370
Property and equipment, net 676,593 521,378
Deposits 52,320  
Prepaid research and development expenses 759,531 696,531
Total assets 48,010,710 48,462,279
Current liabilities:    
Accounts payable 1,246,739 564,235
Accrued bonuses 826,455 1,037,112
Accrued expenses 3,263,359 6,145,631
Deferred rent 81,398  
Total current liabilities 5,417,951 7,746,978
Deferred rent, net of current portion 841,426 243,647
Total liabilities 6,259,377 7,990,625
Stockholders' equity:    
Preferred Stock; $0.001 par value; 5,000,000 shares authorized; no shares issued and outstanding at September 30, 2016 and December 31, 2015
Common stock; $0.001 par value; 100,000,000 shares authorized, 23,063,430 shares issued and outstanding at September 30, 2016; 100,000,000 shares authorized, 19,050,204 shares issued and outstanding at December 31, 2015 23,062 19,049
Additional paid-in capital 152,375,985 127,619,078
Accumulated deficit (110,647,714) (87,166,473)
Total stockholders' equity 41,751,333 40,471,654
Total liabilities and stockholders' equity $ 48,010,710 $ 48,462,279