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Note 6 - Long-term Debt and Notes Payable to Bank (Details Textual) - Pinnacle Financial Partners [Member] $ in Millions		9 Months Ended
	Sep. 11, 2019 USD ($)	Jul. 31, 2019 USD ($)	Oct. 31, 2018 USD ($)
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 7.0
Debt Instrument, Interest Rate, Effective Percentage		4.90%
Debt Instrument, Current Ratio		2.1
Long-term Line of Credit, Total		$ 5.7	$ 3.0
Line of Credit Facility, Remaining Borrowing Capacity		$ 1.3	$ 4.0
Revolving Credit Facility [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 6.5
Line of Credit Facility, Increase (Decrease), Net, Total	$ (500,000.0)
Debt Instrument, Covenant, Fixed Charge Coverage Ratio	1.25
Debt Instrument, Covenant, Current Ratio	3.0
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		2.50%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Effective Percentage		2.50%
Revolving Credit Facility [Member] | Prime Rate [Member] | Subsequent Event [Member]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Virginia Real Estate Loan and North Carolina Real Estate Loan [Member]
Debt Instrument, Interest Rate, Stated Percentage		3.95%

X

- Definition

The current ratio that must be kept under the covenant of the debt instrument.

+ References

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The fixed charge coverage ratio that is required by the covenant of the debt instrument.

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- Definition

The current ratio held by the company.

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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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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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

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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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Amount of increase (decrease) of the credit facility.

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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 of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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