Information Regarding Segments of Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net sales:
Net sales from continuing operations	$ 28,700	$ 24,726
Operating income (loss):
Operating income (loss) from continuing operations	1,447	1,175
Interest expense (income), net	101	90
Foreign currency exchange (gain) loss, net	7	(13)
Other income, net	(77)	(117)
Consolidated income from continuing operations before income tax provision	1,416	1,215
Depreciation and amortization expense:
Consolidated depreciation and amortization expense	1,519	1,579
LIFO expense for the Forged Components Group	(178)	159
Forged Components Group
Net sales:
Net sales from continuing operations	27,445	22,688
Operating income (loss):
Operating income (loss) from continuing operations	3,548	2,186
Depreciation and amortization expense:
Consolidated depreciation and amortization expense	1,363	1,428
Turbine Component Services and Repair Group
Net sales:
Net sales from continuing operations	1,255	2,038
Operating income (loss):
Operating income (loss) from continuing operations	(544)	(133)
Depreciation and amortization expense:
Consolidated depreciation and amortization expense	81	77
Corporate unallocated expenses
Operating income (loss):
Operating income (loss) from continuing operations	(1,557)	(878)
Depreciation and amortization expense:
Consolidated depreciation and amortization expense	$ 75	$ 74