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Note 12 - Long-term Debt (Details Textual)		3 Months Ended
	Aug. 12, 2019 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021	Dec. 31, 2020 USD ($)	Dec. 31, 2019
Long-term Debt, Total		$ 22,763,275
Long-term Debt, Current Maturities, Total		1,195,128		$ 1,282,504
First National Bank of Omaha [Member]
Long-term Line of Credit, Total		0
Minimum Consolidated Leverage Ratio Requirement				3.25	3.50
Consolidated Fixed Charge Ratio Requirement				1.15
First National Bank of Omaha [Member] | Forecast [Member]
Minimum Consolidated Leverage Ratio Requirement			3.00
First National Bank of Omaha [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 5,000,000
First National Bank of Omaha [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.00%
First National Bank of Omaha [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.50%
First National Bank of Omaha [Member] | Term Loan [Member]
Debt Instrument, Face Amount	$ 23,560,000
Long-term Debt, Total		22,763,275
Long-term Debt, Current Maturities, Total		1,195,128
First National Bank of Omaha [Member] | Term Loan 1 [Member]
Long-term Debt, Total		$ 18,060,000
Debt Instrument, Term (Year)		15 years
Debt Instrument, Interest Rate, Stated Percentage		4.25%
First National Bank of Omaha [Member] | Term Loan 2 [Member]
Long-term Debt, Total		$ 5,500,000
Debt Instrument, Interest Rate, Stated Percentage		3.375%

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- Definition

The consolidated fixed charge ratio requirement.

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The minimum consolidated leverage ratio requirement.

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

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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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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- Definition

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 unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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