Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Indefinite-lived Intangible Assets [Line Items]      
Impairment of digital assets $ 9,353 $ 0  
Purchase of other digital currencies     $ 287
Impairment of other digital currencies 62   159
Digital Assets      
Indefinite-lived Intangible Assets [Line Items]      
Aggregate cost basis of digital currency holdings $ 42,994   41,964
Digital Assets | Other Digital Assets      
Indefinite-lived Intangible Assets [Line Items]      
Digital assets     $ 66