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Note 4 - Valuation and Qualifying Accounts (Details) - Roll Forward of the Allowance for Doubtful Accounts (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Roll Forward of the Allowance for Doubtful Accounts [Abstract] |  |  |
Balance at beginning of year | $ 111,996 | $ 80,926 | $ 146,929
Additions (reductions) charged to costs and expenses | (106,504) | 77,143 | (45,315)
Foreign exchange gain/loss | (727) | 242 | 156
Write-offs | (3,594) | (46,315) | (20,844)
Balance at end of year | $ 1,171 | $ 111,996 | $ 80,926

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- Definition Additions (reductions) charged to costs and expenses + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition A valuation allowance for receivables that are expected to be uncollectible due to foreign exchange. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Details
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Balance Type: | na
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- Definition A valuation allowance for receivables due to an Entity for more than one year from the balance sheet date that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524 + Details
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Period Type: | instant

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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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