Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Financial Instruments Measured at Fair Value (Details)

v3.21.2
Summary of Significant Accounting Policies - Financial Instruments Measured at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Liabilities:        
Warrant liability $ 1,762 $ 3,263 $ 4,443 $ 1,614
Fair Value, Recurring        
Assets:        
Digital currencies 789      
Total 789      
Liabilities:        
Warrant liability 1,762     1,614
Total 1,762     1,614
Level 1 | Fair Value, Recurring        
Assets:        
Digital currencies 789      
Total 789      
Liabilities:        
Warrant liability 0     0
Total 0     0
Level 2 | Fair Value, Recurring        
Assets:        
Digital currencies 0      
Total 0      
Liabilities:        
Warrant liability 1,762     1,614
Total 1,762     1,614
Level 3 | Fair Value, Recurring        
Assets:        
Digital currencies 0      
Total 0      
Liabilities:        
Warrant liability 0     0
Total $ 0     $ 0