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BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 72,428 $ 91,032
Short-term investments 44,261 95,452
Accounts receivable 502 0
Prepaid expenses and other current assets 16,458 8,202
Total current assets 133,649 194,686
Property and equipment, net 2,362 1,936
Long-term investments 0 2,114
Right-of-use assets 12,752 2,274
Other assets 1,150 552
Total assets 149,913 201,562
Current liabilities:    
Accounts payable 4,277 5,626
Accrued compensation and benefits 5,422 5,672
Current portion of operating lease liability 3,492 2,117
Loan payable, current portion 32,264 4,167
Deferred revenue 0 4,177
Accrued expenses and other current liabilities 7,366 6,657
Total current liabilities 52,821 28,416
Operating lease liability, net of current portion 9,748 413
Loan payable, net of current portion 0 46,621
Deferred revenue, non-current 4,727 0
Total liabilities 67,296 75,450
Commitments and contingencies
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized; no shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively. 0 0
Common stock, $0.0001 par value; 300,000,000 shares authorized; 130,182,535 and 93,599,975 shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively. 13 9
Additional paid-in capital 795,540 680,872
Accumulated deficit (712,930) (554,765)
Accumulated other comprehensive income (loss) (6) (4)
Total stockholders’ equity 82,617 126,112
Total liabilities and stockholders’ equity $ 149,913 $ 201,562