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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
Jun. 30, 2021
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     $ 10,165
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  
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%