Operating Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Segment Reporting Information [Line Items]
Revenues	$ 136,336us-gaap_Revenues	$ 120,079us-gaap_Revenues
Cost of Services	113,632us-gaap_CostOfServices	101,963us-gaap_CostOfServices
Gross Profit	22,704us-gaap_GrossProfit	18,116us-gaap_GrossProfit
Selling, General and Administrative Expense	18,700	17,572
Loss (gain) on sale of assets	6us-gaap_GainLossOnDispositionOfAssets	(41)us-gaap_GainLossOnDispositionOfAssets
Operating Income	3,998us-gaap_OperatingIncomeLoss	585us-gaap_OperatingIncomeLoss
Depreciation and amortization	579us-gaap_Depreciation	617us-gaap_Depreciation
Capital Expenditures	699	236
Assets	198,541us-gaap_Assets	165,222us-gaap_Assets	201,108us-gaap_Assets
Communications [Member]
Segment Reporting Information [Line Items]
Revenues	31,808	24,591
Cost of Services	26,510	20,659
Gross Profit	5,298	3,932
Selling, General and Administrative Expense	3,679	2,982
Loss (gain) on sale of assets	7	0
Operating Income	1,612	950
Depreciation and amortization	118	100
Capital Expenditures	192	7
Assets	25,053	22,006
Residential [Member]
Segment Reporting Information [Line Items]
Revenues	48,593	41,212
Cost of Services	39,405	33,794
Gross Profit	9,188	7,418
Selling, General and Administrative Expense	7,301	6,481
Loss (gain) on sale of assets	0	(40)
Operating Income	1,887	977
Depreciation and amortization	123	123
Capital Expenditures	69	5
Assets	40,317	34,670
Commercial & Industrial [Member]
Segment Reporting Information [Line Items]
Revenues	43,767	41,230
Cost of Services	38,483	37,316
Gross Profit	5,284	3,914
Selling, General and Administrative Expense	3,587	3,480
Loss (gain) on sale of assets	(1)	(4)
Operating Income	1,698	438
Depreciation and amortization	66	67
Capital Expenditures	8	55
Assets	43,895	46,372
Infrastructure Solutions [Member]
Segment Reporting Information [Line Items]
Revenues	12,168	13,046
Cost of Services	9,234	10,194
Gross Profit	2,934	2,852
Selling, General and Administrative Expense	2,019	2,387
Loss (gain) on sale of assets	0	3
Operating Income	915	462
Depreciation and amortization	201	242
Capital Expenditures	291	54
Assets	27,606	27,817
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Cost of Services	0	0
Gross Profit	0	0
Selling, General and Administrative Expense	2,114	2,242
Loss (gain) on sale of assets	0	0
Operating Income	(2,114)	(2,242)
Depreciation and amortization	71	85
Capital Expenditures	139	115
Assets	$ 61,670	$ 34,357

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Total costs related to services rendered by an entity during the reporting period.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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