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Stockholders' Equity - Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Class of Stock [Line Items]    
Warrant exercise price (in dollars per share)   $ 2.25
Warrant liability $ 1 $ 7
Change in fair value of warrants $ (6) $ (2,400)
Series U Warrants [Member]    
Class of Stock [Line Items]    
Common stock issued (in shares) 3,450,000  
Sale of Stock, Price Per Share $ 5.00  
Warrants expected term 5 years  
Representative Warrants [Member]    
Class of Stock [Line Items]    
Number of securities called by warrant or right 75,000  
Warrant exercise price (in dollars per share) $ 6.25  
Warrant exercise price decrease   $ 2.81
Common Stock [Member]    
Class of Stock [Line Items]    
Common stock issued (in shares) 7,864,379 2,150,113
Warrants expected term 5 years  
Outstanding Warrants [Member]    
Class of Stock [Line Items]    
Warrant liability   $ 4,500
Change in fair value of warrants   $ 700
Outstanding Warrants [Member] | Series U Warrants [Member]    
Class of Stock [Line Items]    
Number of securities called by warrant or right   3,447,500
Class of warrant outstanding 2,141,000  
Number of warrant classified as equity 2,138,500  
Number of warrants exercised 2,141,000  
Common Class A [Member]    
Class of Stock [Line Items]    
Common stock issued (in shares) 289,000  
Common Class B [Member]    
Class of Stock [Line Items]    
Number of securities called by warrant or right 2,711,000