Property and Equipment - Schedule of property and equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	$ 24,288	$ 313
Less: accumulated depreciation	(295)	(238)
Property, plant, and equipment, net	23,993	75
Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	22,682	313
Equipment | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	4,208	305
Construction equipment | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	269	0
Leasehold improvements | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	165	2
Furniture and fixtures | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	150	6
Fiber plant | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	13,410	0
Customer premise equipment | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	805	0
Towers | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	37	0
Land | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	667	0
Plant in service | Property plant and equipment service
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	2,971	0
Construction
Property, Plant and Equipment [Line Items]
Total property, plant, and equipment, gross	$ 1,606	$ 0