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Condensed Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 17,793 $ 35,933
Marketable securities 56,205 52,792
Prepaid expenses and other current assets 3,120 1,904
Total current assets 77,118 90,629
Property and equipment, net 1,387 1,217
Other assets 234 227
Total assets 78,739 92,073
Current liabilities:    
Accounts payable 1,784 1,951
Accrued liabilities 7,860 8,120
Notes payable, current portion 7,200 7,200
Deferred license revenue 36 36
Deferred grant funding 22 23
Total current liabilities 16,902 17,330
Notes payable, net of current portion 1,972 3,625
Deferred license revenue, net of current portion 27 36
Deferred rent, net of current portion 160  
Total liabilities 19,061 20,991
Commitments and contingencies
Stockholders’ equity:    
Preferred stock, $0.001 par value; 10,000,000 shares authorized at March 31, 2018 and December 31, 2017; no shares issued or outstanding at March 31, 2018 and December 31, 2017
Common stock, $0.001 par value; 200,000,000 shares authorized at March 31, 2018 and December 31, 2017; 19,912,143 and 19,882,551 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively 20 20
Additional paid-in capital 239,575 238,025
Accumulated deficit (179,809) (166,929)
Accumulated other comprehensive loss (108) (34)
Total stockholders’ equity 59,678 71,082
Total liabilities and stockholders’ equity $ 78,739 $ 92,073