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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 8,785 $ 15,571
Restricted cash 480 304
Short-term investments 1,486 8,233
Prepaid and other current assets 2,966 2,313
Total current assets 13,717 26,421
Property and equipment, net 622 394
Operating lease right-of-use assets 262 160
Other noncurrent assets 1,044 1,320
Total assets 15,645 28,295
Current liabilities:    
Accounts payable 7,120 6,008
Accrued expenses 2,499 2,784
Accrued compensation 4,739 3,670
Operating lease liabilities- current 103 197
Total current liabilities 14,461 12,659
Operating lease liabilities- noncurrent 163 0
Total liabilities 14,624 12,659
Commitments and contingencies (Note 6)
Preferred stock, $0.0001 par value; 5,000,000 shares authorized; no shares issued and outstanding 0 0
Stockholders’ equity:    
Common stock, $0.0001 par value; 300,000,000 shares authorized; 49,642,097 and 48,137,880 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively; 5 5
Additional paid-in capital 533,341 528,810
Accumulated deficit (532,325) (513,179)
Total stockholders’ equity 1,021 15,636
Total liabilities and stockholders’ equity $ 15,645 $ 28,295