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Segment Information - Schedule of Reported Segment Revenue, Segment Operating Income (Loss), and Significant Segment Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]    
General and administrative $ 2,233 $ 3,791
Plant specific operations 427 74
Plant nonspecific operations 227 38
Cost of other revenue (exclusive of depreciation shown separately) 176 36
Cost of wireless and fiber internet services (exclusive of depreciation shown separately) 196 30
Total segment operating expenses 4,020 4,060
Loss from operations (986) (3,571)
Income before income taxes (739) (5,700)
Marketing 153 0
Emigration tax (expense) 0 1,711
Loss on dissenting shareholders' liability 0 829
Consolidated net loss before income taxes and discontinued operations (739) (5,700)
Operating Segments    
Segment Reporting Information [Line Items]    
Revenue 3,034 489
General and administrative 1,227 831
Depreciation and amortization 572 80
Plant specific operations 427 74
Plant nonspecific operations 227 38
Cost of other revenue (exclusive of depreciation shown separately) 176 36
Cost of wireless and fiber internet services (exclusive of depreciation shown separately) 196 30
Total segment operating expenses 2,969 1,089
Loss from operations 65 (600)
Other segment items1 [1] 28 0
Marketing 144 0
Operating Segments | Loss by Segment    
Segment Reporting Information [Line Items]    
Income before income taxes 93 (600)
Consolidated net loss before income taxes and discontinued operations 93 (600)
Operating Segments | Corporate And Other    
Segment Reporting Information [Line Items]    
General and administrative (1,006) (2,960)
Depreciation and amortization (36) (11)
Income before income taxes (739) (5,700)
Marketing (9) 0
Interest income, net 219 411
Emigration tax (expense) 0 (1,711)
Loss on dissenting shareholders' liability 0 (829)
Consolidated net loss before income taxes and discontinued operations (739) (5,700)
Operating Segments | Wireless internet sevices    
Segment Reporting Information [Line Items]    
Revenue 1,672 319
Operating Segments | Fiber internet services    
Segment Reporting Information [Line Items]    
Revenue 930 106
Operating Segments | Other revenue    
Segment Reporting Information [Line Items]    
Revenue $ 432 $ 64
[1] Other segment items included in Segment operating loss include interest expense, gain on the sale of assets, and other income.