Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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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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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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Fixed interest rate related to the interest rate derivative.

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The increase (decrease) during the period in the carrying value of derivative instruments reported as assets that are due to be disposed of within one year (or the normal operating cycle, if longer).

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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Note 6 - Long-term Debt (Details Textual)			1 Months Ended	12 Months Ended	42 Months Ended
Note 6 - Long-term Debt (Details Textual)	Jul. 01, 2018 USD ($)	Jul. 01, 2013 USD ($)	Jul. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Mar. 08, 2016 USD ($)	Jul. 01, 2014 USD ($)
Derivative, Fixed Interest Rate							2.53%
Derivative, Notional Amount							$ 14,250,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months				$ 5,893,000	$ 5,893,000
Long-term Debt, Maturities, Repayments of Principal in Year Two				6,429,000	6,429,000
Long-term Debt, Maturities, Repayments of Principal in Year Four				6,429,000	6,429,000
Long-term Debt, Maturities, Repayments of Principal in Year Five				14,463,000	14,463,000
Debt Issuance Costs, Gross				$ 70,000	$ 70,000
Ratio of Maximum Funded Indebtedness to EBITDA				4	4
Fixed Charges Numerator				1.25	1.25
Long-term Debt, Maturities, Repayments of Principal in Year Three				$ 6,429,000	$ 6,429,000
Per Month through July 1, 2015 [Member]
Debt Instrument, Periodic Payment, Principal			$ 187,500
Per Month through June 1, 2018 [Member]
Debt Instrument, Periodic Payment, Principal			$ 250,000
Interest Rate Swap [Member]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value						$ 152,000
Interest Rate Derivative Assets, at Fair Value				50,000	50,000
Increase (Decrease) in Derivative Assets				$ (55,000)
Other Tax Expense (Benefit)					$ 21,000
Senior Debt [Member]
Ratio of Maximum Funded Indebtedness to EBITDA				3.5	3.5
Amended Credit Agreement [Member] \| Term Loan [Member]
Debt Instrument, Face Amount		$ 30,000,000				45,000,000
Amended Credit Agreement [Member] \| Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate				0.85%
Debt Instrument, Interest Rate, Stated Percentage				1.57%	1.57%
Scenario, Forecast [Member]
Derivative, Fixed Interest Rate	2.43%
Debt Instrument, Periodic Payment, Principal	$ 3,250,000
Revolving Credit Facility [Member] \| Amended Credit Agreement [Member]
Line of Credit Facility, Expiration Period		5 years
Line of Credit Facility, Maximum Borrowing Capacity		$ 15,000,000				$ 20,000,000
Line of Credit Facility, Commitment Fee Percentage				0.10%
Letters of Credit Outstanding, Amount				$ 0	$ 0
Add on Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate				0.85%
Debt Instrument, Interest Rate, Stated Percentage				1.60%	1.60%