Quarterly report pursuant to Section 13 or 15(d)

Share-based compensation - Underwriters Warrants (Details)

v3.23.1
Share-based compensation - Underwriters Warrants (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 18, 2023
Dec. 21, 2021
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Sep. 19, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Warrants to purchase shares         500,000 500,000 172,500
Warrants exercise price   $ 12.50     $ 0.625 $ 0.625  
Percentage of warrants exercisable 100.00% 100.00%          
Number of Shares              
Warrants outstanding at the beginning of the period     672,500        
Warrants outstanding at the end of the period     672,500 672,500      
Exercisable at March 31, 2023     672,500        
Weighted Average Exercise Price              
Outstanding at the beginning of the period     $ 3.67        
Outstanding at the end of the period     3.67 $ 3.67      
Exercisable at March 31, 2023     $ 3.67        
Remaining term     4 years 6 months 6 days 3 years 11 months 12 days      
Exercisable contractual term     4 years 7 days        
Intrinsic value of warrants outstanding     $ 0        
Warrants              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unrecognized compensation expense     $ 0