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Supplemental Financial Statement Information - Warrants and Contingent Value Rights (Details) - USD ($)
$ / shares in Units, $ in Thousands
Mar. 15, 2021
Aug. 24, 2020
Mar. 31, 2021
Mar. 09, 2020
Subsidiary, Sale of Stock [Line Items]        
Sale of common stock, net (in shares) 1,927,049      
Total proceeds before expenses $ 877      
Warrant Term   3 years    
Warrant Liability        
Subsidiary, Sale of Stock [Line Items]        
Derivative liability     $ 8,685  
Fair value portion of warrants     $ 2,018  
Securities Purchase Agreement        
Subsidiary, Sale of Stock [Line Items]        
Sale of common stock, net (in shares)   504,590    
Additional shares of common stock   504,590    
Exercise price   $ 60.00    
Share price   50.00   $ 46.91
Warrant Price   $ 4.00    
Total warrant proceeds   $ 27,248    
Total proceeds before expenses   $ 449    
Percentage of ownership interest   4.90%    
Threshold Period for Holding of Shares   1 year    
Contingent Value Rights Agreement [Member]        
Subsidiary, Sale of Stock [Line Items]        
Number of trading days, Weighted average price   30 days    
Maximum amount of contingent value right   $ 2,523    
Percentage of contingent value rights eligible on total proceeds   10.00%