Note 2 - Summary of Significant Accounting Policies - Schedule of Useful Lives (Details)	Sep. 30, 2025
Minimum [Member]
Useful life (Year)	5 years
Minimum [Member] | Fiber Plant [Member]
Useful life (Year)	15 years
Minimum [Member] | Equipment [Member]
Useful life (Year)	3 years
Minimum [Member] | Leasehold Improvements [Member]
Useful life (Year)	6 years
Minimum [Member] | Furniture and Fixtures [Member]
Useful life (Year)	5 years
Minimum [Member] | Tower Sites and Construction Equipment [Member]
Useful life (Year)	5 years
Maximum [Member]
Useful life (Year)	10 years
Maximum [Member] | Fiber Plant [Member]
Useful life (Year)	30 years
Maximum [Member] | Equipment [Member]
Useful life (Year)	7 years
Maximum [Member] | Leasehold Improvements [Member]
Useful life (Year)	15 years
Maximum [Member] | Furniture and Fixtures [Member]
Useful life (Year)	7 years
Maximum [Member] | Tower Sites and Construction Equipment [Member]
Useful life (Year)	10 years