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.