Operation Segments (Tables)

6 Months Ended

Mar. 31, 2017

Operating Segments [Abstract]

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

		Three Months Ended March 31, 2017
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	61,674	$	67,923	$	55,272	$	18,793	$	-	$	203,662
Cost of services				52,378		52,351		52,604		14,515		-		171,848
Gross profit				9,296		15,572		2,668		4,278		-		31,814
Selling, general and administrative				6,120		10,932		5,261		4,222		3,585		30,120
Contingent consideration				-		-		-		83		-		83
(Gain) loss on sale of assets				(1)		(3)		(8)		6		-		(6)
Income (loss) from operations			$	3,177	$	4,643	$	(2,585)	$	(33)	$	(3,585)	$	1,617
Other data:
	Depreciation and amortization expense		$	171	$	151	$	306	$	1,622	$	69	$	2,319
	Capital expenditures		$	481	$	108	$	435	$	56	$	15	$	1,095
	Total assets		$	68,475	$	50,743	$	54,485	$	107,535	$	126,736	$	407,974

		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

		Six Months Ended March 31, 2017
							Commercial &		Infrastructure
			Communications		Residential		Industrial		Solutions		Corporate		Total
Revenues			$	114,977	$	134,365	$	109,228	$	37,270	$	-	$	395,840
Cost of services				97,710		103,063		100,454		27,617		-		328,844
Gross profit				17,267		31,302		8,774		9,653		-		66,996
Selling, general and administrative				11,834		21,485		9,585		8,322		7,088		58,314
Contingent consideration				-		-		-		83		-		83
Gain on sale of assets				(1)		(3)		(7)		(2)		-		(13)
Income (loss) from operations			$	5,434	$	9,820	$	(804)	$	1,250	$	(7,088)	$	8,612
Other data:
	Depreciation and amortization expense		$	345	$	301	$	654	$	2,945	$	133	$	4,378
	Capital expenditures		$	1,560	$	347	$	644	$	137	$	203	$	2,891
	Total assets		$	68,475	$	50,743	$	54,485	$	107,535	$	126,736	$	407,974

		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