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Note 11 - Long-term Debt (Details Textual)		6 Months Ended
	Sep. 17, 2024 USD ($)	Jun. 24, 2024 USD ($)	Dec. 31, 2027	Dec. 31, 2026	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2024	May 30, 2024 USD ($)	Sep. 22, 2023 USD ($)	Sep. 21, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 06, 2021 USD ($)	Aug. 12, 2019 USD ($)
Long-Term Debt					$ 25,900,000	$ 26,500,000
Long-Term Debt, Current Maturities					1,927,719	$ 1,201,448
First National Bank of Omaha [Member] | Link Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 15,000,000						$ 15,000,000	$ 10,000,000	$ 5,000,000			$ 40,000,000
Credit Agreement, Maximum Dividend Amount											$ 8,125,000
Long-Term Line of Credit					9,100,000
Minimum Consolidated Leverage Ratio Requirement							3.5
Consolidated Fixed Charge Ratio Requirement						1.15
First National Bank of Omaha [Member] | Link Credit Facility [Member] | Forecast [Member]
Minimum Consolidated Leverage Ratio Requirement			3	3.25
First National Bank of Omaha [Member] | Link Credit Facility [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		0.65%
First National Bank of Omaha [Member] | Link Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.15%
First National Bank of Omaha [Member] | Link Credit Facility [Member] | Term Loan 1 [Member]
Debt Instrument, Face Amount												$ 30,000,000	18,000,000
Debt Instrument, Interest Rate, Stated Percentage												4.00%
Long-Term Debt, Gross					30,000,000
Long-Term Debt					25,900,000
Long-Term Debt, Current Maturities					880,000
First National Bank of Omaha [Member] | Link Credit Facility [Member] | Term Loan 2 [Member]
Debt Instrument, Face Amount													$ 5,500,000
First National Bank of Omaha [Member] | Boston Omaha Broadband Credit Facility [Member]
Minimum Consolidated Leverage Ratio Requirement	3.5
Consolidated Fixed Charge Ratio Requirement	1.15
Long-Term Debt, Maturity, Remainder of Fiscal Year					1,050,000
Long-Term Debt, Maturity, Year One					1,050,000
Long-Term Debt, Maturity, Year Two					1,050,000
Long-Term Debt, Maturity, Year Three					1,050,000
Long-Term Debt, Maturity, Year Four					1,050,000
Long-Term Debt, Maturity, Year Five					1,050,000
Long-Term Debt, Maturity, after Year Five					5,050,000
First National Bank of Omaha [Member] | Boston Omaha Broadband Credit Facility [Member] | Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 20,000,000
Long-Term Line of Credit					$ 10,300,000
Number of Operating Subsidiaries	3
Debt Instrument, Term (Year)	5 years
Debt Instrument, Term, Principle Payments (Year)	10 years
Unused Portion of Debt, Fee, Percent	0.25%
First National Bank of Omaha [Member] | Boston Omaha Broadband Credit Facility [Member] | Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate	2.75%
First National Bank of Omaha [Member] | Boston Omaha Broadband Credit Facility [Member] | Credit Facility [Member] | Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.75%
First National Bank of Omaha [Member] | Boston Omaha Broadband Credit Facility [Member] | Credit Facility [Member] | Minimum [Member]
Debt Instrument, Incremental Drawdowns	$ 1,000,000

X

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The consolidated fixed charge ratio requirement.

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The maximum dividend amount available under credit agreement.

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The period of time in which the principle payments are due for the term loan.

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The minimum consolidated leverage ratio requirement.

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Represents the number of operating subsidiaries.

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The unused debt fee percentage.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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