Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Common Stock Warrant Liabilities) (Details)

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Fair Value Measurements (Common Stock Warrant Liabilities) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Common Stock Warrant liabilities at beginning of period   $ 13,869  
Change in fair value of Warrant liabilities $ 512 (6,166)  
Common Stock Warrant liabilities at end of period 9,971 9,971 $ 13,869
Common Stock Warrant      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Common Stock Warrant liabilities at beginning of period   13,869  
Common Stock Warrant liabilities at end of period 9,971 9,971 13,869
Checkpoint Common Stock Warrants | Common Stock Warrant      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Common Stock Warrant liabilities at beginning of period   11,170  
Change in fair value of Warrant liabilities   (7,209)  
Common Stock Warrant liabilities at end of period 3,961 3,961 11,170
Avenue | Common Stock Warrant      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Common Stock Warrant liabilities at beginning of period   2,609  
Issuance of Warrants   2,235 8,300
Change in fair value of Warrant liabilities   1,028  
Common Stock Warrant liabilities at end of period $ 5,872 5,872 $ 2,609
Urica | Common Stock Warrant      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Change in fair value of Warrant liabilities   15  
Urica | Placement Agent Warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Issuance of Warrants   $ 33