Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Operating Activities:
Net income (loss)	$ (1,745)	$ 2,432
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation	2,470	2,369
Amortization	706	1,186
Stock-based compensation	73	725
Bad debt expense	185	288
Deferred income taxes	(4)	22
Changes in operating assets and liabilities:
Accounts receivable, net	(21,580)	(2,126)
Costs and estimated earnings in excess of billings on uncompleted contracts	(1,525)	4,620
Inventories	(1,101)	1,618
Prepaid expenses and other current assets	4,391	2,250
Accounts payable and income taxes payable	(5,740)	(4,988)
Accrued liabilities	(6,526)	(10,393)
Billings in excess of costs and estimated earnings on uncompleted contracts	20,610	9,415
Other	(74)	(618)
Net cash (used in) provided by operating activities	(9,860)	6,800
Investing Activities:
Proceeds from sale of fixed assets	58	24
Purchases of property, plant and equipment	(9,378)	(763)
Decrease in restricted cash	1,000
Net cash used in investing activities	(8,320)	(739)
Financing Activities:
Borrowings on Canadian revolving line of credit	6,174	1,280
Payments on Canadian revolving line of credit	(6,174)	(1,026)
Payments on industrial development revenue bonds	(400)	(400)
Payments on short-term and other financing	(212)	(88)
Net cash used in financing activities	(612)	(234)
Net (decrease) increase in cash and cash equivalents	(18,792)	5,827
Effect of exchange rate changes on cash and cash equivalents	(404)	(262)
Cash and cash equivalents at beginning of period	123,466	115,353
Cash and cash equivalents at end of period	$ 104,270	$ 120,918