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CONDENSED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 10,581 $ 130,981
Short-term investments 129,470 0
Accounts receivable and unbilled receivable 308 320
Prepaid expenses and other current assets 2,512 2,055
Total current assets 142,871 133,356
Property and equipment, net 422 624
Operating lease right-of-use assets 178 343
Other assets 263 404
Total Assets 143,734 134,727
Current liabilities:    
Accounts payable 543 1,366
Accrued expenses 3,592 3,851
Operating lease liabilities 402 860
Other current liabilities 42 42
Total current liabilities 4,579 6,119
Derivative financial instruments—warrants 17 285
Operating lease liabilities, net of current portion 6 9
Other liabilities 214 156
Total Liabilities 4,816 6,569
Commitments and contingencies (Note 8)
Stockholders’ equity    
Preferred stock, 20,000 shares authorized; (Note 7) 1 1
Common stock, $0.0001 par value, 150,000 shares authorized; 39,552 and 36,781 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively 4 4
Additional paid-in capital 383,611 361,819
Service receivables (1,245) (2,171)
Accumulated other comprehensive loss (10) 0
Accumulated deficit (243,443) (231,495)
Total stockholders’ equity 138,918 128,158
Total liabilities and stockholders’ equity $ 143,734 $ 134,727