Quarterly report pursuant to Section 13 or 15(d)

Cryptocurrencies (Summary of Additional Information About Cryptocurrencies) (Details)

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Cryptocurrencies (Summary of Additional Information About Cryptocurrencies) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]  
Beginning balance, January 1, 2021 $ 11,626
Revenue recognized from cryptocurrencies mined 23,173
Mining pool operating fees (232)
Ending balance, March 31, 2021 $ 34,567