Condensed Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities
Net Income (Loss) Available to Common Stockholders, Basic	$ 1,181	$ 5,632
Adjustments to reconcile net (loss) to net cash provided by operating activities:
Depreciation	3,217	3,000
Amortization	18	17
Increase (Decrease) in Other Operating Assets and Liabilities, Net	42	5
(Increase) decrease in current assets:
Accounts receivable	1,694	662
Inventories	38	(3,003)
Prepaid expenses and other	(399)	(916)
Increase (Decrease) in Derivative Assets	(341)	(287)
Increase (decrease) in current liabilities:
Accounts payable	3,934	3,238
Derivative Liability	(414)	(791)
Accrued expenses	(508)	2,416
Decrease in other long-term liabilities	0	(25)
Net Cash Provided by (Used in) Operating Activities	8,462	9,948
Cash Flows From Investing Activities
Purchase of property and equipment	(228)	(775)
Net Cash Provided by (Used in) Investing Activities	(228)	(775)
Cash Flows From Financing Activities
Proceeds from notes payable	0	4,157
Payments on borrowings	(7,232)	(15,145)
Net cash (used in) financing activities	(7,232)	(10,988)
Cash and Cash Equivalents, Period Increase (Decrease)	1,002	(1,815)
Cash And Equivalents-Beginning	1,487	3,139
Cash And Equivalents-Ending	2,489	1,324
Supplemental Cash Flow Information [Abstract]
Cash paid for interest	212	272
Payments of Capital Distribution	$ 6,664	$ 0