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CONDENSED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 14,662 $ 130,981
Short-term investments 110,922 0
Accounts receivable and unbilled receivable 242 320
Prepaid expenses and other current assets 2,744 2,055
Total current assets 128,570 133,356
Property and equipment, net 504 624
Operating lease right-of-use assets 261 343
Other assets 238 404
Total Assets 129,573 134,727
Current liabilities:    
Accounts payable 803 1,366
Accrued expenses 2,999 3,851
Operating lease liabilities 635 860
Other current liabilities 42 42
Total current liabilities 4,479 6,119
Derivative financial instruments—warrants 78 285
Operating lease liabilities, net of current portion 8 9
Other liabilities 191 156
Total Liabilities 4,756 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; 37,552 and 36,781 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively 4 4
Additional paid-in capital 363,350 361,819
Service receivables (1,791) (2,171)
Accumulated other comprehensive loss (67) 0
Accumulated deficit (236,680) (231,495)
Total stockholders’ equity 124,817 128,158
Total liabilities and stockholders’ equity $ 129,573 $ 134,727