Operation Segments (Tables)

6 Months Ended

Mar. 31, 2019

Operating Segments [Abstract]

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

		Three Months Ended March 31, 2019
			Commercial &				Infrastructure
			Industrial		Communications		Solutions		Residential		Corporate		Total
Revenues			$	79,975	$	70,437	$	34,450	$	72,052	$	-	$	256,914
Cost of services				71,184		58,492		27,004		56,999		-		213,679
Gross profit				8,791		11,945		7,446		15,053		-		43,235
Selling, general and administrative				7,363		7,666		4,685		11,187		4,169		35,070
Contingent consideration				-		-		(149)		-		-		(149)
Loss (gain) on sale of assets				(1)		-		101		(2)		-		98
Operating income (loss)			$	1,429	$	4,279	$	2,809	$	3,868	$	(4,169)	$	8,216
Other data:
	Depreciation and amortization expense		$	629	$	426	$	1,175	$	217	$	27	$	2,474
	Capital expenditures		$	615	$	193	$	635	$	398	$	-	$	1,841
	Total assets		$	77,898	$	91,960	$	114,739	$	55,417	$	77,257	$	417,271

		Three Months Ended March 31, 2018
			Commercial &				Infrastructure
			Industrial		Communications		Solutions		Residential		Corporate		Total
Revenues			$	65,589	$	50,244	$	23,866	$	65,978	$	-	$	205,677
Cost of services				59,068		40,892		18,842		53,035		-		171,837
Gross profit				6,521		9,352		5,024		12,943		-		33,840
Selling, general and administrative				6,849		6,201		4,637		9,688		2,272		29,647
Contingent consideration				-		-		71		-		-		71
Loss (gain) on sale of assets				(17)		(8)		6		(1)		-		(20)
Operating income (loss)			$	(311)	$	3,159	$	310	$	3,256	$	(2,272)	$	4,142
Other data:
	Depreciation and amortization expense		$	527	$	219	$	1,140	$	155	$	20	$	2,061
	Capital expenditures		$	413	$	398	$	205	$	108	$	-	$	1,124
	Total assets		$	72,559	$	60,102	$	100,884	$	47,695	$	103,747	$	384,987

		Six Months Ended March 31, 2019
			Commercial &				Infrastructure
			Industrial		Communications		Solutions		Residential		Corporate		Total
Revenues			$	152,558	$	139,762	$	63,929	$	144,507	$	-	$	500,756
Cost of services				135,092		115,851		50,556		114,421		-		415,920
Gross profit				17,466		23,911		13,373		30,086		-		84,836
Selling, general and administrative				14,079		14,600		9,166		22,324		6,987		67,156
Contingent consideration				-		-		(115)		-		-		(115)
Loss (gain) on sale of assets				(4)		-		101		(2)		-		95
Operating income (loss)			$	3,391	$	9,311	$	4,221	$	7,764	$	(6,987)	$	17,700
Other data:
	Depreciation and amortization expense		$	1,255	$	841	$	2,269	$	426	$	55	$	4,846
	Capital expenditures		$	1,467	$	693	$	822	$	845	$	102	$	3,929
	Total assets		$	77,898	$	91,960	$	114,739	$	55,417	$	77,257	$	417,271

		Six Months Ended March 31, 2018
			Commercial &				Infrastructure
			Industrial		Communications		Solutions		Residential		Corporate		Total
Revenues			$	118,591	$	104,703	$	45,551	$	135,132	$	-	$	403,977
Cost of services				107,227		86,231		35,842		107,773		-		337,073
Gross profit				11,364		18,472		9,709		27,359		-		66,904
Selling, general and administrative				12,644		12,285		9,194		20,054		5,559		59,736
Contingent consideration				-		-		71		-		-		71
Loss (gain) on sale of assets				(29)		(9)		5		(1)		-		(34)
Operating income (loss)			$	(1,251)	$	6,196	$	439	$	7,306	$	(5,559)	$	7,131
Other data:
	Depreciation and amortization expense		$	1,084	$	435	$	2,383	$	296	$	71	$	4,269
	Capital expenditures		$	923	$	473	$	345	$	586	$	-	$	2,327
	Total assets		$	72,559	$	60,102	$	100,884	$	47,695	$	103,747	$	384,987