Detail of Certain Balance Sheet Accounts (Tables)

12 Months Ended

Sep. 30, 2015

Detail Of Certain Balance Sheet Accounts [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	Years Ended September 30,
	2015		2014
Balance at beginning of period	$	780	$	980
Additions to costs and expenses		416		170
Deductions for uncollectible receivables written off, net of recoveries		(354)		(370)
Balance at end of period	$	842	$	780

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	Years Ended September 30,
	2015		2014
Accounts payable, trade	$	47,033	$	38,639
Accrued compensation and benefits		22,527		22,076
Accrued insurance liabilities		4,518		4,560
Other accrued expenses		8,832		8,757
	$	82,910	$	74,032

Contracts In Progresstable [Text Block]

	Years Ended September 30,
	2015		2014
Costs incurred on contracts in progress	$	329,942	$	281,764
Estimated earnings		37,576		32,088
		367,518		313,852
Less--Billings to date		(380,365)		(327,113)
Net contracts in progress	$	(12,847)	$	(13,261)
Costs and estimated earnings in excess of billings on uncompleted contracts		12,318		8,591
Less--Billings in excess of costs and estimated earnings on uncompleted contracts		(25,165)		(21,852)
Net contracts in progress	$	(12,847)	$	(13,261)

Schedule of Other Assets, Noncurrent [Table Text Block]

	Years Ended September 30,
	2015		2014
Deposits	$	-	$	250
Deferred tax assets		147		298
Executive Savings Plan assets		617		625
Securities and equity investments		919		919
Other		2,332		2,375
Total	$	4,015	$	4,467

Schedule of Cost Method Investments [Table Text Block]

	Years Ended September 30,
	2015		2014
Carrying value	$	919	$	919
Unrealized gains		66		94
Fair value	$	985	$	1,013