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 12 Months Ended
Mar. 31, 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 (6,678)  
Common Stock Warrant liabilities at end of period 9,459 $ 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 9,459 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 (7,566)  
Common Stock Warrant liabilities at end of period 3,604 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 878  
Common Stock Warrant liabilities at end of period 5,722 $ 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 10  
Urica | Placement Agent Warrants    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Issuance of Warrants $ 33