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Balance Sheets - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 40,234,157 $ 55,198,923
Accounts receivable 20,000,000  
Prepaid expenses and other current assets 534,851 916,249
Total current assets 60,769,008 56,115,172
Property and equipment, net 579,174 452,270
Prepaid research and development expenses 696,531 696,531
Total assets 62,044,713 57,263,973
Current liabilities:    
Accounts payable 1,106,952 874,028
Accrued bonuses 446,898 753,786
Accrued expenses 5,204,396 4,735,719
Current portion of deferred rent 38,327 97,012
Total current liabilities 6,796,573 6,460,545
Deferred rent 28,155  
Total liabilities $ 6,824,728 $ 6,460,545
Stockholders' equity:    
Preferred Stock; $0.001 par value; 5,000,000 shares authorized, no shares issued and outstanding at June 30, 2015 and December 31, 2014    
Common stock; $0.001 par value; 100,000,000 shares authorized, 19,019,133 shares issued and outstanding at June 30, 2015; 18,939,838 shares issued and outstanding at December 31, 2014 $ 19,020 $ 18,940
Additional paid-in capital 126,317,664 125,181,463
Accumulated deficit (71,116,699) (74,396,975)
Total stockholders' equity 55,219,985 50,803,428
Total liabilities and stockholders' equity $ 62,044,713 $ 57,263,973