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Note 3 - Long-Term Debt Financing (Details Textual)		3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 09, 2021 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022 USD ($)
Long-Term Debt		$ 12,344,000		$ 12,344,000
Amortization of Debt Issuance Costs		19,000	$ 19,000	37,000	$ 37,000
Debt Issuance Costs, Net		162,000		162,000				$ 198,000
The Credit Agreement [Member] | Fifth Third Bank, N.A. [Member]
Debt Instrument, Term (Year)	5 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 22,000,000
Number of Debt Instruments	3
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio	1.25
Debt Instrument, Covenant, Maximum Funded Debt to EDITDA Ratio	3.0
The Credit Agreement, First Loan and Second Loan Facility [Member] | Fifth Third Bank, N.A. [Member]
Debt Instrument, Face Amount	$ 9,500,000
Long-Term Debt		11,575,000		11,575,000				12,624,000
The Credit Agreement, First Loan and Second Loan Facility [Member] | Fifth Third Bank, N.A. [Member] | Forecast [Member]
Debt Instrument, Interest Rate, Stated Percentage							48.00%
The Credit Agreement, Second Loan Facility [Member] | Fifth Third Bank, N.A. [Member]
Debt Instrument, Face Amount	$ 5,500,000
The Credit Agreement, Third Loan Facility [Member] | Fifth Third Bank, N.A. [Member] | Revolving Credit Facility [Member]
Debt Instrument, Term (Year)	5 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 7,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.25%
The Credit Agreement, Third Loan Facility [Member] | Fifth Third Bank, N.A. [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	3.00%
DFC Loan [Member]
Long-Term Debt		$ 931,000		$ 931,000				1,041,000
Debt Instrument, Interest Rate, Stated Percentage		3.67%		3.67%
Debt Issuance Costs, Gross		$ 0		$ 0				$ 9,000

X

- Definition

The maximum funded debt to EBITDA ratio allowed under the covenant of the debt instrument.

+ References

No definition available.

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Requirement for fixed charge coverage ratio under the debt agreement.

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The number of debt instruments.

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- Definition

Amount of amortization expense attributable to debt issuance costs.

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- Definition

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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- Definition

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

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- Definition

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

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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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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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit 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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