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Consolidated Statements Of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:      
Net loss $ (76,246,000) $ (32,385,000) $ (6,334,000)
Adjustments to reconcile net loss to net cash used in operating activities:      
Stock-based compensation 2,066,000 1,759,000 988,000
Depreciation 804,000 310,000 22,000
Amortization of intangible assets 497,000 224,000 0
Gain on sale of property and equipment     (346,000)
Changes in operating assets and liabilities:      
Prepaid and other assets 1,189,000 (10,956,000) (220,000)
Operating lease right-of-use assets and liabilities (9,000) 28,000 (2,000)
Accounts payable (3,449,000) 6,215,000 458,000
Accrued development expense (523,000) 2,084,000 (58,000)
Accrued compensation and benefits (1,707,000) 1,794,000 25,000
Other liabilities (136,000) 731,000 85,000
Net cash used in operating activities (77,514,000) (30,196,000) (5,382,000)
Cash flows from investing activities:      
Purchases of property and equipment (2,712,000) (22,214,000)  
Proceeds from sale of property and equipment     360,000
Net cash (used in) provided by investing activities (2,712,000) (22,214,000) 360,000
Cash flows from financing activities:      
Proceeds from issuance of common stock upon exercise of stock options 475,000 1,824,000 256,000
Proceeds from issuance of common stock upon exercise of common stock warrants   692,000 4,940,000
Proceeds from common stock offering, net of issuance costs 47,329,000 189,825,000 70,251,000
Net cash provided by financing activities 47,804,000 192,341,000 75,447,000
Net (decrease) increase in cash and cash equivalents (32,422,000) 139,931,000 70,425,000
Cash and cash equivalents at beginning of period 233,437,000 93,506,000 23,081,000
Cash and cash equivalents at end of period 201,015,000 $ 233,437,000 $ 93,506,000
Supplemental cash flow information:      
Purchases of property and equipment included in accounts payable $ 340,000