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Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets subject to amortization, net Total Intangible Assets Subject to Amortization, Net | $ 20,101 | $ 20,313
Accumulated amortization | (20,003) | (20,208)
Total intangible assets, net | 98 | 105
Amortization charge for the year to December 31, | 69 | 73
Cryptocurrencies Not Subject to Amortization |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets subject to amortization, net Total Intangible Assets Subject to Amortization, Net | 96 | 100
Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets subject to amortization, net Total Intangible Assets Subject to Amortization, Net | 136 | 137
Accumulated amortization | (136) | (137)
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets subject to amortization, net Total Intangible Assets Subject to Amortization, Net | 2,281 | 2,281
Accumulated amortization | (2,281) | (2,281)
License Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets subject to amortization, net Total Intangible Assets Subject to Amortization, Net | 11,195 | 11,326
Accumulated amortization | (11,193) | (11,321)
Other Intangibles |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets subject to amortization, net Total Intangible Assets Subject to Amortization, Net | 6,393 | 6,469
Accumulated amortization | (6,393) | (6,469)
Total Intangible Assets Subject to Amortization, Net |  |
Finite-Lived Intangible Assets [Line Items] |  |
Total intangible assets subject to amortization, net Total Intangible Assets Subject to Amortization, Net | $ 2 | $ 5

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