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Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Revenue        
Other revenue $ 0 $ 63 $ 0 $ 462
Total revenue, net 5,821 4,458 19,624 22,355
Operating expenses        
Cost of revenues (excluding depreciation and amortization) 3,488 3,340 13,670 12,233
Depreciation and amortization 1,094 1,571 5,540 7,128
Compensation and related taxes 2,249 1,999 7,349 10,575
Professional and consulting fees 1,911 1,155 2,939 5,420
General and administrative 1,301 654 3,036 4,605
Loss on contingency     217 0
Gain on extinguishment - non-debt related 0 (375) (375) 0
Impairment of cryptocurrencies 0 48 285 6,026
Impairment of property and mining equipment     0 95
Unrealized gain on fair value of cryptocurrency, net (109) 0    
Realized gain on sale of cryptocurrencies (62) (119) (351) (3,998)
Total operating expenses 9,872 8,273 32,310 42,084
Gain (loss) on disposal of property and equipment 0 1,198 1,059 (16)
Loss from operations (4,051) (2,617) (11,627) (19,745)
Other income (expense)        
Loss on extinguishment of debt     (25,081) (51,079)
Debt issuance costs     (4,000) 0
Change in fair value of warrant liability and warrant derivative 3,367 (1,790) 59,662 22,948
Gain on termination of warrant     0 139
Other income, net of other expense     453 200
Interest expense, net (6,955) (6,594) (34,001) (14,367)
Total other income (expense) (3,588) (8,384) (2,967) (42,159)
Loss before income taxes (7,639) (11,001) (14,594) (61,904)
Income tax expense (benefit) (1,161) 230 4,063 (298)
Net loss $ (6,478) $ (11,231) $ (18,657) $ (61,606)
Basic net loss per share $ (0.1) $ (0.21) $ (0.34) $ (1.28)
Diluted net loss per share $ (0.1) $ (0.21) $ (0.34) $ (1.28)
Basic weighted average number of shares outstanding 67,663,377 53,828,655 54,769,568 48,044,313
Diluted weighted average number of shares outstanding 67,663,377 53,828,655 54,769,568 48,044,313
Cryptocurrency mining revenue [Member]        
Revenue        
Cryptocurrency mining revenue, net of mining pool operator fees $ 3,220 $ 1,614 $ 9,137 $ 13,477
Mining services revenue [Member]        
Revenue        
Cryptocurrency mining revenue, net of mining pool operator fees $ 2,601 $ 2,781 $ 10,487 $ 8,416