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Note 12 - Subsequent Event (Details Textual) - Revolving Credit Facility [Member] - Chief Executive Officer [Member] - USD ($) | Feb. 09, 2017 | Sep. 30, 2016 | Feb. 04, 2016
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Line of Credit Facility, Maximum Borrowing Capacity |  | $ 2,700,000 | $ 2,200,000
Subsequent Event [Member] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 3,400,000 |  |

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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 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |