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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 57,228 $ 41,958
Short-term investment securities 27,748 26,943
Prepaid research and development 8,478 9,691
Other current assets 987 439
Total current assets 94,441 79,031
Restricted cash 1,246 1,241
Leasehold interest, net 2,203 2,294
Equipment, net 237 251
Right of use asset 7,659 0
Goodwill 799 799
Total assets 106,585 83,616
Current liabilities:    
Accounts payable and accrued expenses 31,498 36,377
Other current liabilities 21,478 219
Accrued compensation 1,708 2,258
Total current liabilities 55,967 38,854
Lease liability – current portion 1,283 0
Deferred rent 0 1,462
Deferred revenue, net of current portion 838 914
Long-term debt 28,513 0
Lease liability – non current 8,062 0
Long-term liabilities 0 18,350
Total liabilities 93,380 59,580
Stockholders’ equity:    
Preferred stock, $0.001 par value per share (10,000,000 shares authorized, none issued and outstanding as of June 30, 2019 and December 31, 2018) 0 0
Common stock, $0.001 par value per share (150,000,000 shares authorized, 93,405,247 and 83,911,855 shares issued, 93,363,938 and 83,870,546 shares outstanding at June 30, 2019 and December 31, 2018, respectively) 93 84
Additional paid-in capital 613,059 552,531
Treasury stock, at cost, 41,309 shares at June 30, 2019 and December 31, 2018 (234) (234)
Accumulated deficit 599,713 528,345
Total liabilities and stockholders’ equity 106,585 83,616
Total stockholders’ equity $ 13,205 $ 24,036