Statements Of Operations - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenues	$ 50,546	$ 52,065
Cost of Goods Sold
Cost of goods sold-non hedging	45,742	44,905
Realized & unrealized hedging (gains)	2,096	(23)
Cost of Goods Sold	47,838	44,882
Gross Margin	2,708	7,183
General and administrative expenses	1,378	1,262
Operating Income	1,330	5,921
Other Income (Expense)
Other (Income) Expense	149	289
Net Income (Loss) Available to Common Stockholders, Basic	$ 1,181	$ 5,632