Annual report pursuant to Section 13 and 15(d)

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

v3.21.1
Cryptocurrencies (Summary of Additional Information About Cryptocurrencies) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]    
Cryptocurrencies, beginning balance $ 3,839 $ 707
Revenue recognized from cryptocurrencies mined 11,984 6,741
Mining pool operating fees (146) (135)
Proceeds from sale of cryptocurrencies (8,298) (3,196)
Purchase of miner equipment with cryptocurrencies (99)
Realized gain on sale/exchange of cryptocurrencies 5,184 665
Impairment of cryptocurrencies (989) (844)
Cryptocurrencies received from sale of equipment 52
Cryptocurrencies, ending balance $ 11,626 $ 3,839