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Certain Balance Sheet Items (Tables)
 12 Months Ended
Dec. 31, 2024
Balance Sheet Related Disclosures [Abstract]  
Schedule of Other Current Assets [Table Text Block]
The following table summarizes other current assets (in thousands):
December 31,
20242023
Bitcoin mining hosting deposit $2,490 $10,000 
Prepaid insurance547 575 
Prepaid services270 193 
Prepaid mining hosting services100 980 
Other31 190 
Other current assets$3,438 $11,938 
Property, Plant and Equipment [Table Text Block]
The following table summarizes property and equipment, net (in thousands):
December 31,
20242023
Mining equipment$27,214 $30,122 
Construction in progress1,750 — 
Total28,964 30,122 
Accumulated depreciation(6,997)(5,956)
Property and equipment, net$21,967 $24,166 
Schedule of Other Assets, Noncurrent [Table Text Block]
The following table summarizes other non-current assets (in thousands):
December 31,
20242023
Prepaid mining hosting services$308 $3,402 
Prepaid services68 — 
Other3 4 
Other non-current assets$379 $3,406