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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 77,196 $ 331,549
Marketable securities 221,222 27,225
Prepaid expenses and other current assets 3,177 2,595
Total current assets 301,595 361,369
Property and equipment, net 455 601
Right-of-use asset 411 602
Total assets 302,461 362,572
Current liabilities:    
Accounts payable 17,534 23,831
Accrued expenses 81,761 91,461
Lease liability 411 602
Total current liabilities 99,706 115,894
Long term liabilities:    
Loan payable, net of discount 99,249 49,289
Total long term liabilities 99,249 49,289
Total liabilities 198,955 165,183
Stockholders' equity:    
Preferred stock, par value $0.0001 per share authorized: 5,000,000 shares at June 30, 2023 and December 31, 2022; 2,369,797 and 2,369,797 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively
Common stock, par value $0.0001 per share authorized: 200,000,000 at June 30, 2023 and December 31, 2022; 18,459,033 and 18,102,523 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively 2 2
Additional paid-in-capital 1,228,949 1,160,079
Accumulated other comprehensive loss (89) (32)
Accumulated deficit (1,125,356) (962,660)
Total stockholders' equity 103,506 197,389
Total liabilities and stockholders' equity $ 302,461 $ 362,572