Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Current assets:
Cash and cash equivalents	$ 18,175	$ 16,104
Restricted cash	1,993	815
Accounts receivable, net of allowance of $98 and $3,363, respectively	37,453	41,826
Inventory	28,518	32,115
Prepaid expenses and other current assets	7,144	9,437
Total current assets	93,283	100,297
Property, plant, and equipment, net	47,213	49,744
Goodwill	20,384	20,384
Other intangible assets, net	1,650	2,159
Other non-current assets, net of allowance of $3,561 and $3,533, respectively	888	1,130
Total assets	163,418	173,714
Current liabilities:
Borrowings from credit facility	17,600	21,706
Accounts payable	19,006	19,643
Deferred gain associated with sale of assets	3,400	0
Warrant liability	226	155
Accrued expenses and other current liabilities	20,461	21,597
Total current liabilities	60,693	63,101
Asset retirement obligations	5,157	5,053
Deferred gain associated with sale of assets	0	3,400
Other long-term liabilities	898	981
Total liabilities	66,748	72,535
Commitments and contingencies (Note 12)
Shareholders’ equity:
Preferred stock, $0.0001 par value, 5,882 shares authorized; none issued or outstanding	0	0
Common stock, no par value, 50,000 shares authorized; 30,674 shares issued and 30,634 shares outstanding as of March 31, 2014; 30,022 shares issued and 29,982 shares outstanding as of September 30, 2013	752,241	749,266
Treasury stock, at cost; 40 shares	(2,071)	(2,071)
Accumulated other comprehensive income	1,625	1,623
Accumulated deficit	(655,125)	(647,639)
Total shareholders’ equity	96,670	101,179
Total liabilities and shareholders’ equity	$ 163,418	$ 173,714