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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 51,885 $ 33,262
Short-term investments 8,953 48,818
Accounts receivable 0 11
Prepaid expenses and other assets 3,309 4,231
Total current assets 64,147 86,322
Property and equipment, net 4,171 4,123
Right-of-use asset 8,117 8,606
Other noncurrent assets 1,465 1,393
Total assets 77,900 100,444
Current liabilities:    
Accounts payable 2,485 1,866
Accrued expenses and other current liabilities 5,480 3,525
Deferred revenue, current 14,015 8,343
Total current liabilities 21,980 13,734
Long-term debt, net 16,801 16,589
Deferred revenue, noncurrent 16,929 0
Lease liability, noncurrent 7,551 7,959
Other noncurrent liabilities 656 656
Total liabilities 63,917 38,938
Stockholders’ equity:    
Preferred stock, $0.0001 par value per share; 10,000,000 shares authorized, no shares issued and outstanding, September 30, 2021 and December 31, 2020 0 0
Common stock, $0.0001 par value per share; 200,000,000 shares authorized, 88,108,543 issued and outstanding, September 30, 2021; 87,651,352 issued and outstanding, December 31, 2020 9 9
Additional paid-in capital 170,217 167,379
Accumulated other comprehensive (loss) income (1) 83
Accumulated deficit (156,242) (105,965)
Total stockholders' equity 13,983 61,506
Total liabilities and stockholders’ equity $ 77,900 $ 100,444