CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Operating Activities:
Net income	$ 29,224	$ 42,076	$ 29,657
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	11,386	8,519	10,465
Amortization	779	1,671	2,612
Gain on sale of discontinued operations, net of tax	(8,563)
Stock-based compensation	3,385	4,464	1,723
Excess tax benefit from stock-based compensation	(407)	(464)	(743)
Bad debt expense/(recovery)	1,074	(544)	842
Deferred income tax benefit	(3,212)	(6,720)	(1,422)
Gain on amended supply agreement	(1,522)
Cash received from amended supply agreement	10,000
Changes in operating assets and liabilities:
Accounts receivable, net	1,959	5,838	(16,209)
Costs and billings in excess of estimates on uncompleted contracts	(17,089)	23,054	(42,247)
Inventories	(3,959)	3,881	3,948
Prepaid expenses and other current assets	(1,101)	(3,530)	4,821
Accounts payable and income taxes payable	1,002	13,029	(5,293)
Accrued liabilities	(4,997)	(633)	6,411
Other, net	1,524	784	(530)
Net assets held for sale	(10,355)
Net cash provided by (used in) operating activities	9,128	91,425	(5,965)
Investing Activities:
Proceeds from sale of property, plant and equipment	118	885	195
Proceeds from sale of Transdyn	14,819
Decrease in cash held in escrow			1,000
Purchases of property, plant and equipment	(16,495)	(74,369)	(29,063)
Net cash used in investing activities	(1,558)	(73,484)	(27,868)
Financing Activities:
Payments on industrial development revenue bonds	(400)	(400)	(400)
Excess tax benefit from stock-based compensation	407	464	743
Shares withheld in lieu of employee tax withholding	(499)	(187)	(154)
Dividends paid	(11,998)
Proceeds from exercise of stock options			1,799
Payments on short-term and other financing	(16)	(329)	(717)
Net cash provided by (used in) financing activities	(12,506)	(452)	1,271
Net increase (decrease) in cash and cash equivalents	(4,936)	17,489	(32,562)
Effect of exchange rate changes on cash and cash equivalents	643	(118)	(864)
Cash and cash equivalents, beginning of period	107,411	90,040	123,466
Cash and cash equivalents, end of period	$ 103,118	$ 107,411	$ 90,040