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Stockholders' Equity - Securities Purchase Agreements (Details) - USD ($)
 12 Months Ended
Oct. 02, 2020
Jun. 15, 2020
May 26, 2020
May 14, 2020
May 14, 2020
May 11, 2020
May 08, 2020
Apr. 09, 2020
Mar. 30, 2020
Dec. 31, 2020
Class of Stock [Line Items]                    
Sale of stock, shares issued (in shares) 6,500,000   1,205,400 146,854   447,761   904,970 800,000  
Number of shares called by warrants (in shares)   2,213,115                
Months until exercisable   6 months         6 months      
Exercise price of warrants (in dollars per share)   $ 3.05               $ 0.01
Expiration term   5 years 6 months                
Gross proceeds $ 100,900,000   $ 2,500,000   $ 810,000     $ 1,100,000 $ 1,000,000.0  
Offering price (in dollars per share) $ 13.50     $ 1.43 $ 1.43 $ 1.34        
Net proceeds $ 94,000,000.0                 $ 112,299,949 [1]
Over-Allotment Option                    
Class of Stock [Line Items]                    
Sale of stock, shares issued (in shares) 975,000                  
Series I Warrant                    
Class of Stock [Line Items]                    
Number of shares called by warrants (in shares)                 131,967  
Series J Warrant                    
Class of Stock [Line Items]                    
Number of securities called by each warrant (in shares)                 1  
Months until exercisable                 6 months  
Exercise price of warrants (in dollars per share)                 $ 0.948  
Expiration term                 5 years 6 months  
Series K Warrant                    
Class of Stock [Line Items]                    
Number of shares called by warrants (in shares)               255,000    
Series L Warrants                    
Class of Stock [Line Items]                    
Number of securities called by each warrant (in shares)               1    
Months until exercisable               6 months    
Exercise price of warrants (in dollars per share)               $ 0.81    
Expiration term               5 years 6 months    
Series M Warrant                    
Class of Stock [Line Items]                    
Number of shares called by warrants (in shares)     482,160              
Months until exercisable     6 months              
Exercise price of warrants (in dollars per share)     $ 2.024              
Expiration term     5 years 6 months              
[1] Net of expenses of $7,507,123, and fair value of warrants issued as a transaction advisory fee as of the date of issuance of $370,666