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Condensed Consolidated Balance Sheets - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 35,998,000 $ 14,472,000
Short-term investments 93,223,000 17,971,000
Restricted cash 50,000 5,333,000
Prepaid and other current assets 3,538,000 1,333,000
Total current assets 132,809,000 39,109,000
Other assets, noncurrent 352,000 128,000
Property and equipment, net 255,000 276,000
Total assets 133,416,000 39,513,000
Current liabilities:    
Accounts payable 369,000 747,000
Accrued compensation 1,082,000 1,366,000
Other accrued liabilities 1,840,000 1,322,000
Deferred revenue   212,000
Deferred rent, current portion 13,000 7,000
Redeemable convertible notes 0 5,085,000
Total current liabilities 3,304,000 8,739,000
Deferred rent, noncurrent portion 161,000  
Total liabilities 3,465,000 8,739,000
Stockholders’ equity:    
Preferred stock, $0.001 par value, 5,000,000 shares authorized; 0 and 3,680 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized; 11,942,729 and 6,081,230 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively 12,000 6,000
Additional paid-in capital 322,468,000 204,262,000
Accumulated other comprehensive loss (24,000)  
Accumulated deficit (192,505,000) (173,494,000)
Total stockholders’ equity 129,951,000 30,774,000
Total liabilities and stockholders’ equity $ 133,416,000 $ 39,513,000