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Consolidated Balance Sheets - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 62,780,000 $ 14,668,000
Prepaid expenses and other current assets 804,000 354,000
Total current assets 63,584,000 15,022,000
Restricted cash 113,000 113,000
Property and equipment, net 504,000 288,000
Other non-current assets 22,000 541,000
Total assets 64,223,000 15,964,000
Current liabilities:    
Current portion of notes payable, net of discount 3,205,000 309,000
Accounts payable 1,328,000 1,132,000
Accrued expenses 3,278,000 2,793,000
Total current liabilities 7,811,000 4,234,000
Deferred rent, net of current portion 26,000 67,000
Note payable, net of current portion and discount 5,742,000 4,439,000
Warrant liability   108,000
Other liability 151,000 23,000
Total liabilities $ 13,730,000 $ 8,871,000
Commitments (Note 9)
Stockholders' equity (deficit):    
Preferred stock, $0.001 par value per share, 5,000,000 and zero shares authorized at December 31, 2015 and December 31, 2014, respectively, zero shares issued and outstanding
Common stock, $0.001 par value; 150,000,000 shares authorized at December 31, 2015 and 132,000,000 shares authorized at December 31, 2014; 15,313,297 and 493,200 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively $ 15,000 $ 1,000
Additional paid-in capital 158,488,000 2,326,000
Accumulated deficit (108,010,000) (75,380,000)
Total stockholders' equity (deficit) 50,493,000 (73,053,000)
Total liabilities, convertible preferred stock and stockholders' equity (deficit) $ 64,223,000 15,964,000
Series A Convertible Preferred Stock    
Current liabilities:    
Convertible preferred stock, $0.001 par value   47,898
Series B Convertible Preferred Stock    
Current liabilities:    
Convertible preferred stock, $0.001 par value   $ 32,248