Note 8 - Loan Payable (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Covenant Period		18 months
Foreign Exchange Risk [Member]
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 3,500,000	$ 3,500,000
Derivative Asset, Fair Value, Gross Asset	31,000,000	31,000,000
Operating Demand Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,000,000	1,000,000
Debt Instrument, Fee Amount	500	500
Long-term Line of Credit	0	$ 0
Base Rate [Member] \| Operating Demand Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%
2012 Demand Loan Facilities [Member]
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	14,000,000	$ 14,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.20%
DLR Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Term		30 days
Long-term Debt	3,500,000	$ 3,500,000
DLR Loan [Member] \| Base Rate [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%
2012 DLRR Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Term		4 years
Proceeds from Lines of Credit	$ 0
2012 DLRR Loan [Member] \| Base Rate [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%
2012 DLRR Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.50%
Amended Credit Facility [Member]
Note 8 - Loan Payable (Details) [Line Items]
Maximum Total Funded Debt To EBITDA Ratio	2.00	2.00
Minimum Fixed Charge Coverage	1.20	1.20
Line of Credit Facility Maximum Annual Capital Expenditure Ceiling		$ 3,600,000
Maximum [Member] \| 2012 Demand Loan Facilities [Member]
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 14,000,000	14,000,000
Line of Credit Facility Share Repurchase Limit		$ 2,000,000

Period of time related to the line of credit facility covenant.

No definition available.

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- Definition

The share repurchase limit of a credit facility.

+ References

No definition available.

+ Details

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- Definition

The amount that the loan facility may not exceed a specified annual capital expenditures.

+ References

No definition available.

+ Details

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- Definition

The ratio for the maximum total funded debt to EDITDA.

+ References

No definition available.

+ Details

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- Definition

The minimum fixed charge coverage.

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No definition available.

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No definition available.

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- 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

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(b))

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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.

+ References

No definition available.

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- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

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-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

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-Topic 210

-SubTopic 20

-Section 55

-Paragraph 7

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-SubTopic 20

-Section 50

-Paragraph 4D

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

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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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-Topic 942

-SubTopic 210

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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- 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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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-SubTopic 210

-Section S99

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-SubTopic 10

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

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