Annual report pursuant to Section 13 and 15(d)

Warrants (Details)

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Warrants (Details) - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Number of Awards      
Non-vested Outstanding at beginning of year (in shares) 375    
Non-vested Outstanding at end of year (in shares) 30,000 375  
Common Stock Warrants      
Number of Awards      
Non-vested Outstanding at beginning of year (in shares) 168,932 68,168  
Issued (in shares) 2,159,395 102,476  
Exercised (in shares) (719,609) (260)  
Expired (in shares)   (1,452)  
Expired (in shares) (11,112)    
Non-vested Outstanding at end of year (in shares) 1,597,606 168,932 68,168
Weighted Average Exercise Price      
Outstanding at beginning of year (in usd per share) $ 199.65 $ 336.40  
Issued (in usd per share) 7.38 135.65  
Exercised (in usd per share) 5.06 192.00  
Expired (in usd per share) 900.00 2,100  
Outstanding at end of year (in usd per share) $ 21.22 $ 199.65 $ 336.40
Weighted Average Remaining Term in Years      
Outstanding 3 years 25 days 3 years 5 months 1 day 2 years 5 months 12 days
Issued 2 years 6 months 18 days 4 years 8 months 4 days