Operation Segments (Tables)

6 Months Ended

Mar. 31, 2016

Operating Segments [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

		Three Months Ended March 31, 2016
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	39,351	$	53,387	$	54,146	$	13,097	$	-	$	159,981
Cost of services				32,767		40,616		48,946		9,840		-		132,169
Gross profit				6,584		12,771		5,200		3,257		-		27,812
Selling, general and administrative				4,979		8,906		4,603		3,115		2,664		24,267
Contingent consideration				-		-		-		266		-		266
Loss on sale of assets				-		-		-		775		-		775
Income (loss) from operations			$	1,605	$	3,865	$	597	$	(899)	$	(2,664)	$	2,504
Other data:
	Depreciation and amortization expense		$	135	$	121	$	252	$	455	$	68	$	1,031
	Capital expenditures		$	479	$	102	$	37	$	114	$	-	$	732
	Total assets		$	41,753	$	38,088	$	48,139	$	33,610	$	74,189	$	235,779

		Three Months Ended March 31, 2015
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	27,945	$	50,169	$	44,505	$	11,133	$	-	$	133,752
Cost of services				23,170		40,503		39,686		8,685		-		112,044
Gross profit				4,775		9,666		4,819		2,448		-		21,708
Selling, general and administrative				3,424		7,731		3,791		2,313		2,150		19,409
Loss (gain) on sale of assets				-		4		(1)		(2)		-		1
Income (loss) from operations			$	1,351	$	1,931	$	1,029	$	137	$	(2,150)	$	2,298
Other data:
	Depreciation and amortization expense		$	129	$	119	$	67	$	204	$	70	$	589
	Capital expenditures		$	278	$	124	$	159	$	366	$	-	$	927
	Total assets		$	27,499	$	37,898	$	46,793	$	28,292	$	60,626	$	201,108

		Six Months Ended March 31, 2016
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	80,111	$	105,514	$	99,410	$	25,712	$	-	$	310,747
Cost of services				65,369		81,071		89,354		19,508		-		255,302
Gross profit				14,742		24,443		10,056		6,204		-		55,445
Selling, general and administrative				9,692		17,620		8,242		5,814		5,410		46,778
Contingent consideration				-		-		-		266		-		266
Loss on sale of assets				-		-		-		776		-		776
Income (loss) from operations			$	5,050	$	6,823	$	1,814	$	(652)	$	(5,410)	$	7,625
Other data:
	Depreciation and amortization expense		$	257	$	242	$	434	$	779	$	136	$	1,848
	Capital expenditures		$	564	$	144	$	185	$	191	$	-	$	1,084
	Total assets		$	41,753	$	38,088	$	48,139	$	33,610	$	74,189	$	235,779

		Six Months Ended March 31, 2015
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	59,753	$	98,762	$	88,272	$	23,301	$	-	$	270,088
Cost of services				49,680		79,908		78,169		17,919		-		225,676
Gross profit				10,073		18,854		10,103		5,382		-		44,412
Selling, general and administrative				7,102		15,032		7,378		4,332		4,263		38,107
Loss (gain) on sale of assets				7		4		(2)		(2)		-		7
Income (loss) from operations			$	2,964	$	3,818	$	2,727	$	1,052	$	(4,263)	$	6,298
Other data:
	Depreciation and amortization expense		$	246	$	242	$	135	$	405	$	141	$	1,169
	Capital expenditures		$	470	$	193	$	167	$	657	$	139	$	1,626
	Total assets		$	27,499	$	37,898	$	46,793	$	28,292	$	60,626	$	201,108