Note 5 - Inventories (Details Textual) - USD ($)	Sep. 30, 2016	Sep. 30, 2015
Held at Supplier Location [Member]
Inventory, Raw Materials, Gross	$ 97,515	$ 80,098
Inventory, Raw Materials, Gross	$ 4,393,928	$ 4,562,535

Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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 210.5-02.6(a)(4))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_InventoryRawMaterials
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant