XML 18 R2.htm IDEA: XBRL DOCUMENT v3.19.2
Balance Sheets - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Current Assets:    
Cash and cash equivalents $ 184,167,114 $ 209,917,595
Prepaid expenses and other current assets 2,301,610 2,351,524
Total current assets 186,468,724 212,269,119
Property and equipment, net 929,898 957,226
Prepaid research and development expenses 1,560,607 1,560,607
Deposits 52,320 52,320
Operating lease right-of-use asset 3,323,294  
Total assets 192,334,843 214,839,272
Current liabilities:    
Accounts payable 3,026,746 2,663,579
Accrued bonuses 1,082,018 1,727,184
Accrued expenses 5,762,812 4,273,620
Operating lease liabilities 761,311  
Deferred rent   98,771
Total current liabilities 10,632,887 8,763,154
Noncurrent operating lease liabilities 3,143,013  
Deferred rent, net of current portion   611,623
Total liabilities 13,775,900 9,374,777
Stockholders' equity:    
Preferred stock; $0.001 par value; 5,000,000 shares authorized; no shares issued and outstanding at June 30, 2019 and December 31, 2018
Common stock; $0.001 par value; 100,000,000 shares authorized, 43,193,190 shares issued and outstanding at June 30, 2019; 100,000,000 shares authorized, 43,160,751 shares issued and outstanding at December 31, 2018 43,192 43,159
Additional paid-in capital 408,980,202 405,972,075
Accumulated deficit (230,464,451) (200,550,739)
Total stockholders' equity 178,558,943 205,464,495
Total liabilities and stockholders' equity $ 192,334,843 $ 214,839,272