Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 114,057 $ 138,685
Marketable securities 13,998 0
Accounts receivable 9,914 7,224
Prepaid expenses and other current assets 6,474 5,434
Total current assets 144,443 151,343
Property and equipment, net 2,142 1,395
Right-of-use asset, net 9,829 10,948
Long-term restricted cash 1,379 1,379
Investments 2,000 0
Other assets 90 370
Total assets 159,883 165,435
Current liabilities:    
Accounts payable 224 443
Accrued expenses 10,533 8,146
Loan payable 5,961 0
Lease liability 1,049 908
Income taxes payable 601 0
Deferred revenue 53,883 72,050
Total current liabilities 72,251 81,547
Non-current liabilities:    
Loan payable, net of current portion 19,673 24,793
Lease liability, net of current portion 8,598 9,647
Deferred revenue 11,417 38,746
Warrant liabilities 25,423 28,708
Total liabilities 137,362 183,441
Commitments and contingencies
Stockholders’ equity (deficit):    
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding at December 31, 2021 and December 31, 2020 0 0
Common stock, $0.0001 par value; 200,000,000 shares authorized; 123,622,965 and 108,071,249 shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively 12 11
Additional paid-in capital 457,391 391,175
Accumulated deficit (430,316) (404,629)
Accumulated other comprehensive loss (4,566) (4,563)
Total stockholders’ equity (deficit) 22,521 (18,006)
Total liabilities and stockholders’ equity (deficit) $ 159,883 $ 165,435