Note 8 - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Finite lived intangible, net			$ 2,701
Finite lived intangible assets, acquired			0
Impairment of finite lived intangible assets			0
Amortization	$ (145)	$ (178)	(272)	$ (208)
Finite lived intangible, net	2,429		2,429
Indefinite lived intangible, net			972
Indefinite lived intangible assets, acquired			0
Impairment of indefinite lived intangible assets			0
Indefinite lived intangible, net	972		972
Intangible asset, net			3,673
Intangible assets acquried			0
Impairment of intangible assets			0
Intangible asset, net	3,401		3,401
IP Addresses [Member]
Indefinite lived intangible, net			392
Indefinite lived intangible assets, acquired			0
Impairment of indefinite lived intangible assets			0
Indefinite lived intangible, net	392		392
CBRS FCC License [Member]
Indefinite lived intangible, net			580
Indefinite lived intangible assets, acquired			0
Impairment of indefinite lived intangible assets			0
Indefinite lived intangible, net	$ 580		$ 580
Subscription Relationships [Member]
Weighted average remaining amortization period (Year)	3 years 8 months 26 days		3 years 8 months 26 days
Finite lived intangible, net			$ 2,234
Finite lived intangible assets, acquired			0
Impairment of finite lived intangible assets			0
Amortization			(247)
Finite lived intangible, net	$ 1,987		$ 1,987
Trade Names [Member]
Weighted average remaining amortization period (Year)	8 years 8 months 1 day		8 years 8 months 1 day
Finite lived intangible, net			$ 467
Finite lived intangible assets, acquired			0
Impairment of finite lived intangible assets			0
Amortization			(25)
Finite lived intangible, net	$ 442		$ 442