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Note 7 - Debt (Details Textual)		1 Months Ended	9 Months Ended
	Aug. 01, 2016 USD ($)	Mar. 31, 2012 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Aug. 05, 2011 USD ($)
HSBC Bank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 7,000,000
HSBC Bank [Member] | Five Year Term Loan [Member]
Repayments of Long-term Debt	$ 2,100,000
Loans Payable to Bank					$ 280,000
Restricted Cash and Cash Equivalents						$ 1,000,000
Restricted Cash, Annual Reduction						$ 200,000
Restricted Cash and Cash Equivalents, Current					$ 200,000
HSBC Bank Mortgage Loan [Member] | HSBC Bank [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		1.75%
HSBC Bank Mortgage Loan [Member] | HSBC Bank [Member]
Debt Instrument, Face Amount		$ 6,000,000
Debt Instrument, Number of Payments		120
Debt Instrument, Periodic Payment		$ 25,000
Debt Instrument, Interest Rate, Effective Percentage			2.1765%		2.067%
Long-term Debt			$ 3,300,000		$ 3,600,000
Repayments of Long-term Debt			225,000	$ 505,000
Restricted Cash and Cash Equivalents, Current					$ 200,000

X

- Definition

The number of payments for a debt instrument.

+ References

No definition available.

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X

- Definition

Amount of the annual reduction in restricted cash.

+ References

No definition available.

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X

- Definition

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

+ References

No definition available.

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
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X

- Definition

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

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-SubTopic 10
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- Definition

Amount of the required periodic payments including both interest and principal payments.

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X

- Definition

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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X

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the normal operating cycle if longer.

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- Definition

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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X

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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