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Stockholders' Equity - Narrative (Details) - USD ($)
 12 Months Ended
Apr. 16, 2021
Dec. 13, 2020
Jul. 31, 2020
Jan. 09, 2020
Dec. 31, 2021
Dec. 31, 2020
Jan. 02, 2020
Class of Stock [Line Items]              
Preferred stock, shares authorized (in shares)         5,000,000 5,000,000  
Preferred stock, par value (in dollars per share)         $ 0.0001 $ 0.0001  
Preferred stock, shares outstanding (in shares)         0 0  
Common stock, shares authorized (in shares)         350,000,000 350,000,000  
Common stock, par value (in dollars per share)         $ 0.0001 $ 0.0001  
Proceeds from issuance of common stock, net of issuance costs         $ 9,005,000 $ 29,599,000  
Common stock to be called by warrants (in shares)       818,900      
Warrant exercise price (in dollars per share)             $ 7.50
Pre-Funded Warrants              
Class of Stock [Line Items]              
Net proceeds of common stock       $ 6,000,000      
Offering (in dollars per share)       $ 3.9725      
Warrants exercisable (in shares)       448,800      
Gross proceeds from warrant exercises       $ 6,500,000      
Investors              
Class of Stock [Line Items]              
Common stock, par value (in dollars per share)   $ 0.0001   $ 0.0001      
Number of shares of stock (in shares)   2,320,000   1,189,000      
Net proceeds of common stock   $ 15,000,000          
Offering (in dollars per share)   $ 7.00   $ 3.9825      
Proceeds from issuance of common stock, net of issuance costs   $ 16,200,000          
Warrant exercise price (in dollars per share)       $ 3.93      
Warrant term       5 years 6 months      
PIPE Investors              
Class of Stock [Line Items]              
Number of shares of stock (in shares)     2,744,078        
Sale of stock, price per share (in dollars per share)     $ 3.335        
Net proceeds of common stock     $ 8,500,000        
Common stock to be called by warrants (in shares)     2,744,078        
Warrant exercise price (in dollars per share)     $ 3.30        
Warrant term     5 years        
Sales Agreement              
Class of Stock [Line Items]              
Sale of stock, authorized amount $ 50,000,000            
Sale of stock, agent fee, percentage of gross proceeds 3.00%            
Number of shares of stock (in shares)         786,927    
Sale of stock, price per share (in dollars per share)         $ 12.04    
Net proceeds of common stock         $ 9,000,000