CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Current assets:
Cash and cash equivalents	$ 17,534	$ 46,328
Accounts receivable, less allowance for doubtful accounts of $620 and $1,298 at September 30, 2017 and March 31, 2018, respectively	65,737	61,602
Inventories	267,870	244,457
Income taxes receivable	10,849
Other current assets	3,669	2,781
Total current assets	365,659	355,168
Property, plant and equipment, net	187,465	192,556
Deferred income taxes	28,731	58,133
Other assets	5,441	5,107
Goodwill	4,789	4,789
Other intangible assets, net	5,802	6,066
Total assets	597,887	621,819
Current liabilities:
Accounts payable	34,235	32,802
Accrued expenses	14,988	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	56,818	54,700
Long-term obligations (less current portion) (Note 14)	8,592	7,896
Deferred revenue (less current portion)	19,079	20,329
Deferred income taxes	1,741	1,741
Accrued pension benefits (less current portion)	88,571	90,957
Accrued postretirement benefits (less current portion)	112,881	112,424
Total liabilities	287,682	288,047
Commitments and contingencies (Notes 6)
Stockholders' equity:
Common stock, $0.001 par value (40,000,000 shares authorized, 12,544,933 and 12,562,133 shares issued and 12,509,757 and 12,520,020 shares outstanding at September 30, 2017 and March 31, 2018, respectively)	13	13
Preferred stock, $0.001 par value (20,000,000 shares authorized, 0 shares issued and outstanding)
Additional paid-in capital	250,050	248,733
Accumulated earnings	129,256	159,366
Treasury stock, 35,176 shares at September 30, 2017 and 42,113 shares at March 31, 2018	(1,869)	(1,646)
Accumulated other comprehensive loss	(67,245)	(72,694)
Total stockholders' equity	310,205	333,772
Total liabilities and stockholders' equity	$ 597,887	$ 621,819