Quarterly report pursuant to Section 13 or 15(d)

Warrants - Warrant Activity (Details)

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Warrants - Warrant Activity (Details) - Warrant - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Warrants Outstanding Number of Shares    
Number of Warrants outstanding beginning balance (in shares) 4,433,593  
Granted (in shares) 0  
Exercised (in shares) 0  
Expired (in shares) (4,000)  
Forfeitures (in shares) (50,000)  
Number of Warrants outstanding, ending balance (in shares) 4,379,593 4,433,593
Exercisable (in shares) 4,379,593 4,433,593
Weighted Average Remaining Contractual Life    
Weighted Average Remaining Contractual Life 3 years 29 days 3 years 4 months 13 days
Forfeitures 7 years 8 months 8 days  
Exercisable 3 years 29 days 3 years 4 months 13 days
Weighted Average Exercise Price Per Share    
Weighted average exercise price per share, beginning balance (in dollars per share) $ 22.50  
Expired (in dollars per share) 30.00  
Forfeitures (in dollars per share) 13.90  
Weighted average exercise price per share, ending balance (in dollars per share) 22.59 $ 22.50
Weighted average exercise price per share, exercisable (in dollars per share) $ 22.59 $ 22.50