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Note 11 - Subsequent Events (Details) - Preferred Stock Outstanding | 0 Months Ended |  |  |
--- | --- | --- | --- | ---
Oct. 01, 2014 | Sep. 30, 2014 | Dec. 31, 2013 | Nov. 10, 2014
Series A Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Shares Outstanding | 1,151,468 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Conversion into Common Shares upon Initial Public Offering | 1,151,468 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Series A Preferred Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Shares Outstanding |  | 1,151,468 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 1,151,468 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |
Series B Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Shares Outstanding | 994,885 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Conversion into Common Shares upon Initial Public Offering | 994,885 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Series B Preferred Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Shares Outstanding |  | 994,885 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 994,885 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |
Series E Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Shares Outstanding | 4,322,126 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Conversion into Common Shares upon Initial Public Offering | 5,579,571 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Series E Preferred Stock [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Shares Outstanding |  | 4,322,126 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember | 4,322,126 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesEPreferredStockMember |
Subsequent Event [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred Shares Outstanding | 6,468,479 us-gaap_PreferredStockSharesOutstanding / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  | 0 us-gaap_PreferredStockSharesOutstanding / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Conversion into Common Shares upon Initial Public Offering | 7,725,924 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |

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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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