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Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 6 Months Ended
Jun. 08, 2022
Jun. 30, 2022
Jun. 30, 2022
Jun. 30, 2021
Jun. 06, 2022
Nov. 03, 2020
Jul. 15, 2019
Class of Warrant or Right [Line Items]              
Warrants issued (in shares)             2,000,000
Warrant exercise price (in dollars per share)         $ 0.0001   $ 0.001
Exercise of warrants (in shares)     0 0      
Shares of common stock   4,000,000          
Shares of common stock in connection with securities purchase agreements 8,850,000            
Minimum              
Class of Warrant or Right [Line Items]              
Warrant exercise price (in dollars per share) $ 0.96            
Maximum              
Class of Warrant or Right [Line Items]              
Warrant exercise price (in dollars per share) $ 1.09            
Senior secured notes due 2025 - first additional offering              
Class of Warrant or Right [Line Items]              
Warrant exercise price (in dollars per share)   $ 0.001 $ 0.001        
Fair value of warrants   $ 6,800 $ 6,800        
Change in fair value of warrant     $ 735        
Senior secured notes due 2025 - first additional offering | Maximum              
Class of Warrant or Right [Line Items]              
Warrants issued (in shares)   2,143,000 2,143,000        
Senior secured notes due 2025              
Class of Warrant or Right [Line Items]              
Warrants issued (in shares)           714,000  
Interest rate   12.50% 12.50%