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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Accounting Policies [Abstract] |
Allowance for Credit Losses on Financing Receivables [Table Text Block] |
|  | December 31, |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Balance, beginning of the year |  | $ | 593,023 |  |  | $ | 337,459 |  |  | $ | 334,473 |
Amounts provided |  |  | - |  |  |  | 255,564 |  |  |  | 138,339 |
Amounts written off |  |  | (446,405 | ) |  |  | - |  |  |  | (135,353 | )
Balance, end of the year |  | $ | 146,618 |  |  | $ | 593,023 |  |  | $ | 337,459 |

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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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