Note 8 - Loan Payable (Details) (USD $)	0 Months Ended	3 Months Ended
Jan. 07, 2015	Mar. 31, 2015
Note 8 - Loan Payable (Details) [Line Items]
Stock Repurchased and Retired During Period, Value		$ 7,712,145
Stock Repurchased During Period, Transaction Costs	70,000
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
Derivative Asset, Fair Value, Gross Asset		19,500,000
Operating Demand Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,000,000
Debt Instrument, Basis Spread on Variable Rate		1.25%
Debt Instrument, Fee Amount		500
Long-term Line of Credit		0
Dutch Auction Member
Note 8 - Loan Payable (Details) [Line Items]
Stock Repurchased and Retired During Period, Shares (in Shares)	193,907
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 18.50
Stock Repurchased and Retired During Period, Value	3,587,280
Maximum [Member] \| 2012 Demand Loan Facilities [Member]
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		14,000,000
Line of Credit Facility Share Repurchase Limit		2,000,000
Base Rate [Member] \| DLR Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%
Base Rate [Member] \| 2012 DLRR Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.25%
London Interbank Offered Rate (LIBOR) [Member] \| 2012 DLRR Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.50%
2012 Demand Loan Facilities [Member]
Note 8 - Loan Payable (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		14,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.20%
DLR Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Long-term Debt		3,500,000
2012 DLRR Loan [Member]
Note 8 - Loan Payable (Details) [Line Items]
Debt Instrument, Term		4 years
Amended Credit Facility [Member]
Note 8 - Loan Payable (Details) [Line Items]
Maximum Total Funded Debt To EBITDA Ratio		2.00
Minimum Fixed Charge Coverage		1.20
Line of Credit Facility Maximum Annual Capital Expenditure Ceiling		$ 3,600,000

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.

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- Definition

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

+ References

No definition available.

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- Definition

The ratio for the maximum total funded debt to EDITDA.

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- Definition

The minimum fixed charge coverage.

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- Definition

Transaction costs related to the repurchase of common stock.

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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.

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No definition available.

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- Definition

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

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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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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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-Publisher FASB

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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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- 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.

+ References

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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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- Definition

Number of shares that have been repurchased and retired during the period.

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- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Total cost of shares repurchased divided by the total number of shares repurchased.

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