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Note 3 - Segment Reporting Information (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2015 USD ($)
Note 3 - Segment Reporting Information (Details) [Line Items] |  |  |  |
Number of Operating Segments |  | 3 |  |
Revenue, Net (in Dollars) | [1] | $ 85,925,000 | $ 78,466,000 |
Accounts, Notes, Loans and Financing Receivable, Net, Current (in Dollars) |  | $ 46,267,000 |  | $ 43,661,000
Intersegment Revenue, Mark-up, Percentange |  | 10.00% |  |
CANADA |  |  |  |
Note 3 - Segment Reporting Information (Details) [Line Items] |  |  |  |
Number of Operating Segments |  | 1 |  |
Revenue, Net (in Dollars) | [1] |  | $ 41,000 |
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |  |  |
Note 3 - Segment Reporting Information (Details) [Line Items] |  |  |  |
Concentration Risk, Percentage |  |  | 0.00% |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |
Note 3 - Segment Reporting Information (Details) [Line Items] |  |  |  |
Concentration Risk, Percentage |  |  |  | 0.00%
Philips 66 [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] |  |  |  |
Note 3 - Segment Reporting Information (Details) [Line Items] |  |  |  |
Revenue, Net (in Dollars) |  | $ 9,660,000 |  |
Concentration Risk, Percentage |  | 11.00% |  |
Philips 66 [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |
Note 3 - Segment Reporting Information (Details) [Line Items] |  |  |  |
Concentration Risk, Percentage |  | 11.00% |  |
Accounts, Notes, Loans and Financing Receivable, Net, Current (in Dollars) |  | $ 5,202,000 |  |
[1] | Net sales are attributed to geographic areas based upon the location of the operation making the sale.

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