Operation Segments (Tables)

9 Months Ended

Jun. 30, 2016

Operating Segments [Abstract]

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

		Three Months Ended June 30, 2016
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	48,702	$	56,867	$	59,512	$	14,518	$	-	$	179,599
Cost of services				40,487		43,388		51,882		9,845		-		145,602
Gross profit				8,215		13,479		7,630		4,673		-		33,997
Selling, general and administrative				5,185		9,237		4,771		3,248		3,275		25,716
Contingent consideration				-		-		-		66		-		66
(Gain) loss on sale of assets				-		-		(17)		51		-		34
Income (loss) from operations			$	3,030	$	4,242	$	2,876	$	1,308	$	(3,275)	$	8,181
Other data:
	Depreciation and amortization expense		$	153	$	122	$	410	$	897	$	74	$	1,656
	Capital expenditures		$	122	$	393	$	377	$	109	$	71	$	1,072
	Total assets		$	53,711	$	40,008	$	58,559	$	92,559	$	32,686	$	277,523

		Three Months Ended June 30, 2015
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	35,516	$	52,991	$	44,406	$	11,169	$	-	$	144,082
Cost of services				28,451		42,615		39,161		8,803		-		119,030
Gross profit				7,065		10,376		5,245		2,366		-		25,052
Selling, general and administrative				4,275		7,709		3,776		2,463		2,323		20,546
Gain on sale of assets				(31)		-		(16)		-		-		(47)
Income (loss) from operations			$	2,821	$	2,667	$	1,485	$	(97)	$	(2,323)	$	4,553
Other data:
	Depreciation and amortization expense		$	141	$	120	$	71	$	236	$	68	$	636
	Capital expenditures		$	174	$	64	$	130	$	366	$	-	$	734
	Total assets		$	39,096	$	37,690	$	45,776	$	28,266	$	61,678	$	212,506

		Nine Months Ended June 30, 2016
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	128,813	$	162,381	$	158,923	$	40,230	$	-	$	490,347
Cost of services				105,855		124,459		141,237		29,354		-		400,905
Gross profit				22,958		37,922		17,686		10,876		-		89,442
Selling, general and administrative				14,877		26,856		13,014		9,062		8,685		72,494
Contingent consideration				-		-		-		332		-		332
(Gain) loss on sale of assets				-		-		(17)		828		-		811
Income (loss) from operations			$	8,081	$	11,066	$	4,689	$	654	$	(8,685)	$	15,805
Other data:
	Depreciation and amortization expense		$	410	$	364	$	845	$	1,674	$	210	$	3,503
	Capital expenditures		$	685	$	537	$	563	$	300	$	71	$	2,156
	Total assets		$	53,711	$	40,008	$	58,559	$	92,559	$	32,686	$	277,523

		Nine Months Ended June 30, 2015
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	95,269	$	151,753	$	132,677	$	34,471	$	-	$	414,170
Cost of services				78,132		122,523		117,331		26,721		-		344,707
Gross profit				17,137		29,230		15,346		7,750		-		69,463
Selling, general and administrative				11,377		22,741		11,155		6,795		6,585		58,653
(Gain) loss on sale of assets				(24)		4		(18)		(2)		-		(40)
Income (loss) from operations			$	5,784	$	6,485	$	4,209	$	957	$	(6,585)	$	10,850
Other data:
	Depreciation and amortization expense		$	388	$	362	$	207	$	640	$	209	$	1,806
	Capital expenditures		$	644	$	257	$	297	$	1,023	$	164	$	2,385
	Total assets		$	39,096	$	37,690	$	45,776	$	28,266	$	61,678	$	212,506