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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 121,136 $ 201,015
Prepaid expenses and other current assets 8,497 10,211
Total current assets 129,633 211,226
Operating lease right-of-use assets 0 122
Property and equipment, net 21,854 22,864
Intangible assets, net 176 622
Total assets 151,663 234,834
Current liabilities:    
Accounts payable and other accrued expenses 10,573 4,017
Accrued development expense 3,037 2,280
Accrued compensation and benefits 200 170
Operating lease liabilities, current 0 104
Other current liabilities 385 492
Total current liabilities 14,195 7,063
Operating lease liabilities, non-current 0 35
Other non-current liabilities 0 197
Total liabilities 14,195 7,295
Commitments and contingencies (Notes 10, 11 and 12)
Stockholders' equity:    
Preferred stock, $0.001 par value; 10,000,000 shares authorized, none issued and outstanding 0 0
Common stock, $0.001 par value; 120,000,000 shares authorized; 42,236,919 and 41,735,557 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively 42 42
Additional paid-in capital 518,195 511,049
Retained Earnings (Accumulated Deficit) (380,769) (283,552)
Total stockholders' equity 137,468 227,539
Total liabilities and stockholders' equity $ 151,663 $ 234,834