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Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	$ 35,642,393us-gaap_StockholdersEquity
Exercise of stock options	247,983us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Exercise of stock options (in Shares)	74,997us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	291,913us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Repurchase and retirement of shares	(7,712,145)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
Stock-based compensation	125,048us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Income tax effect related to stock options exercised	412,642us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
Net income for the period	2,833,943us-gaap_NetIncomeLoss	476,839us-gaap_NetIncomeLoss
Unrealized loss on foreign currency forward contracts treated as hedges	(960,866)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges	416,074us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	227,511us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
Balance	31,005,072us-gaap_StockholdersEquity
Common Stock [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	14,130,059us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Balance (in Shares)	11,329,732us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Exercise of stock options	360,949us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Exercise of stock options (in Shares)	74,997us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Repurchase and retirement of shares	(516,003)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Repurchase and retirement of shares (in Shares)	(407,996)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Balance	13,975,005us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Balance (in Shares)	10,996,733us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Additional Paid-in Capital [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	29,090,058us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Exercise of stock options	(112,966)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Repurchase and retirement of shares	(7,196,142)us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Stock-based compensation	125,048us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Income tax effect related to stock options exercised	412,642us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Balance	22,318,640us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember
Retained Earnings [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	(6,955,283)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Net income for the period	2,833,943us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balance	(4,121,340)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
AOCI Attributable to Parent [Member]
Note 14 - Stockholders' Equity (Details) - Stockholders' Equity Transactions [Line Items]
Balance	(622,441)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Unrealized loss on foreign currency forward contracts treated as hedges	(960,866)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges	416,074us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance	$ (1,167,233)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember

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Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Number of share options (or share units) exercised during the current period.

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