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Revenue Recognition (Tables)

6 Months Ended

Mar. 31, 2019

Revenue Recognition [Abstract]

Disaggregation Of Revenue [Table Text Block]

		Three Months Ended March 31,						Six Months Ended March 31,
		2019			2018			2019			2018
Commercial & Industrial		$	79,975			65,589			152,558			118,591
Communications			70,437			50,244			139,762			104,703
Infrastructure Solutions
Industrial Services			12,145			10,404			24,368			21,457
Custom Power Solutions			22,305			13,462			39,561			24,094
Total			34,450			23,866			63,929			45,551
Residential
Single-family			51,492			43,594			101,968			88,208
Multi-family and Other			20,560			22,384			42,539			46,924
Total			72,052			65,978			144,507			135,132
Total Revenue		$	256,914		$	205,677		$	500,756		$	403,977

		Three Months Ended March 31, 2019
			Commercial &						Infrastructure
			Industrial			Communications			Solutions			Residential			Total
Fixed-price			$	76,467		$	48,602		$	30,130		$	72,052		$	227,251
Time-and-material				3,508			21,835			4,320			-			29,663
Total revenue			$	79,975		$	70,437		$	34,450		$	72,052		$	256,914
		Three Months Ended March 31, 2018
			Commercial &						Infrastructure
			Industrial			Communications			Solutions			Residential			Total
Fixed-price			$	58,183		$	37,344		$	20,636		$	65,978		$	182,141
Time-and-material				7,406			12,900			3,230			-			23,536
Total revenue			$	65,589		$	50,244		$	23,866		$	65,978		$	205,677
		Six Months Ended March 31, 2019
			Commercial &						Infrastructure
			Industrial			Communications			Solutions			Residential			Total
Fixed-price			$	142,297		$	97,431		$	57,641		$	144,507		$	441,876
Time-and-material				10,261			42,331			6,288			-			58,880
Total revenue			$	152,558		$	139,762		$	63,929		$	144,507		$	500,756
		Six Months Ended March 31, 2018
			Commercial &						Infrastructure
			Industrial			Communications			Solutions			Residential			Total
Fixed-price			$	107,103		$	81,500		$	40,309		$	135,132		$	364,044
Time-and-material				11,488			23,203			5,242			-			39,933
Total revenue			$	118,591		$	104,703		$	45,551		$	135,132		$	403,977

Contract With Customer Asset And Liability [Table Text Block]

		March 31,			September 30,
		2019			2018
Costs and estimated earnings on uncompleted contracts		$	586,289		$	539,226
Less: Billings to date and unbilled accounts receivable			(590,928)			(541,606)
		$	(4,639)		$	(2,380)

		March 31,			September 30,
		2019			2018
Costs and estimated earnings in excess of billings		$	28,293		$	31,446
Billings in excess of costs and estimated earnings			(32,932)			(33,826)
		$	(4,639)		$	(2,380)

X

- Definition

Tabular disclosure of contract balances and changes in contract balances.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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