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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Income Statement [Abstract]        
Revenue from contract with customer, product and service, extensible enumeration Service [Member] Service [Member] Service [Member] Service [Member]
Service revenue $ 1,209 $ 1,705 $ 1,722 $ 1,727
Cost of revenue 0 388 0 388
Gross profit 1,209 1,317 1,722 1,339
Operating expenses:        
Research and development expenses 2,850 10,204 5,526 20,323
Selling, general and administrative expenses 5,323 10,007 11,487 20,277
Total operating expenses 8,173 20,211 17,013 40,600
Loss from operations (6,964) (18,894) (15,291) (39,261)
Other income (expense), net:        
Change in fair value of warrant liability 0 451 0 338
Realized loss on disposal of assets (55) (17) (55) (17)
Interest income 4 357 22 912
Interest expense 0 (732) (57) (1,652)
Other income (1) 0 52 20
Total other income (expense), net (52) 59 (38) (399)
Net loss $ (7,016) $ (18,835) $ (15,329) $ (39,660)
Net loss per share, basic (in dollars per share) $ (0.42) $ (9.81) $ (1.05) $ (21.60)
Net loss per share, diluted (in dollars per share) $ (0.42) $ (9.81) $ (1.05) $ (21.60)
Weighted average shares outstanding, basic (in shares) 16,597,027 1,919,555 14,582,974 1,835,777
Weighted average shares outstanding, fully diluted (in shares) 16,597,027 1,919,555 14,582,974 1,835,777