CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Current assets:
Cash and cash equivalents	$ 14,579	$ 46,328
Accounts receivable, less allowance for doubtful accounts of $620 and $1,201 at September 30, 2017 and June 30, 2018, respectively	66,839	61,602
Inventories	271,666	244,457
Income taxes receivable	6,450
Other current assets	2,243	2,781
Total current assets	361,777	355,168
Property, plant and equipment, net	183,693	192,556
Deferred income taxes	35,937	58,133
Other assets	5,597	5,107
Goodwill	4,789	4,789
Other intangible assets, net	5,671	6,066
Total assets	597,464	621,819
Current liabilities:
Accounts payable	37,546	32,802
Accrued expenses	16,297	14,108
Income taxes payable		195
Accrued pension and postretirement benefits	5,095	5,095
Deferred revenue—current portion	2,500	2,500
Total current liabilities	61,438	54,700
Long-term obligations (less current portion) (Note 14)	8,558	7,896
Deferred revenue (less current portion)	18,454	20,329
Deferred income taxes	1,741	1,741
Accrued pension benefits (less current portion)	87,378	90,957
Accrued postretirement benefits (less current portion)	113,181	112,424
Total liabilities	290,750	288,047
Commitments and contingencies (Notes 6)
Stockholders' equity:
Common stock, $0.001 par value (40,000,000 shares authorized, 12,544,933 and 12,551,266 shares issued and 12,509,757 and 12,509,153 shares outstanding at September 30, 2017 and June 30, 2018, respectively)	13	13
Preferred stock, $0.001 par value (20,000,000 shares authorized, 0 shares issued and outstanding)
Additional paid-in capital	250,653	248,733
Accumulated earnings	127,213	159,366
Treasury stock, 35,176 shares at September 30, 2017 and 42,113 shares at June 30, 2018	(1,869)	(1,646)
Accumulated other comprehensive loss	(69,296)	(72,694)
Total stockholders' equity	306,714	333,772
Total liabilities and stockholders' equity	$ 597,464	$ 621,819