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Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 40,683 $ 53,840
Restricted cash 153
Accounts receivable 476 67
Prepaid expenses and other current assets 1,913 871
Total current assets 43,225 54,778
Property and equipment, net 265 321
Operating lease right-of-use asset 1,060 2,093
Long-term restricted cash 1,472 1,625
Other long-term assets 428
Total assets 46,450 58,817
Current liabilities:    
Accounts payable 1,155 839
Accrued expenses and other current liabilities 2,748 1,233
Operating lease liability 1,281 1,431
Deferred revenue 1,140 939
Total current liabilities 6,324 4,442
Deferred revenue, net of current portion 5,080 6,069
Operating lease liability, net of current portion 857
Total liabilities 11,404 11,368
Commitments and contingencies (Note 12)
Stockholders’ equity:    
Preferred stock, $0.0001 par value — 500,000 shares authorized; 6,746 shares designated Series A convertible preferred stock; no and 1,830 shares issued and outstanding at September 30, 2022 and December 31, 2021, respectively 1,081
Common stock, $0.0001 par value — 200,000,000 shares authorized; 3,639,185 and 3,222,037 shares issued and outstanding at September 30, 2022 and December 31, 2021, respectively
Additional paid-in capital 304,306 301,008
Accumulated deficit (269,260) (254,640)
Total stockholders’ equity 35,046 47,449
Total liabilities and stockholders’ equity $ 46,450 $ 58,817