Quarterly report pursuant to Section 13 or 15(d)

Fair value measurements (Details)

v3.23.1
Fair value measurements (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total $ 45,688,000 $ 96,572,000
Recurring basis    
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total 45,688,000  
Recurring basis | Corporate debt securities    
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total 40,791,000  
Recurring basis | U.S. Treasury securities    
Cash equivalents:    
Total Cash Equivalents 3,992,000  
Recurring basis | Agency bonds    
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total 4,897,000  
Recurring basis | Level 1    
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total 40,791,000  
Recurring basis | Level 1 | Corporate debt securities    
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total 40,791,000  
Recurring basis | Level 2    
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total 4,897,000  
Recurring basis | Level 2 | U.S. Treasury securities    
Cash equivalents:    
Total Cash Equivalents 3,992,000  
Recurring basis | Level 2 | Agency bonds    
Marketable securities:    
Available-for-sale securities, Debt Securities, Current, Total $ 4,897,000