Operating Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013
Segment Reporting Information [Line Items]
Revenues	$ 120,266	$ 121,995	$ 240,345	$ 249,259
Cost of Services	100,240	105,999	202,202	215,283
Gross Profit	20,026	15,996	38,143	33,976
Selling, General and Administrative Expense	19,172	16,606	36,744	31,528
Loss (gain) on sale of assets	(22)	(21)	(62)	(40)
Operating Income (Loss)	876	(589)	1,461	2,488
Depreciation and amortization	620	539	1,262	1,078
Capital Expenditures	488	295	713	375
Assets	170,343	153,253	170,343	153,253	179,252
Communications [Member]
Segment Reporting Information [Line Items]
Revenues	25,147	31,806	49,738	71,925
Cost of Services	21,006	25,975	41,665	58,862
Gross Profit	4,141	5,831	8,073	13,063
Selling, General and Administrative Expense	3,163	3,301	6,145	6,860
Loss (gain) on sale of assets	0	0	0	0
Operating Income (Loss)	978	2,530	1,928	6,203
Depreciation and amortization	102	92	201	179
Capital Expenditures	55	130	63	171
Assets	25,010	25,366	25,010	25,366
Residential
Segment Reporting Information [Line Items]
Revenues	42,181	39,344	83,393	75,349
Cost of Services	34,529	32,564	68,323	62,463
Gross Profit	7,652	6,780	15,070	12,886
Selling, General and Administrative Expense	6,932	6,412	13,414	11,640
Loss (gain) on sale of assets	(1)	(12)	(41)	(21)
Operating Income (Loss)	721	380	1,697	1,267
Depreciation and amortization	118	89	241	185
Capital Expenditures	158	68	163	94
Assets	36,170	38,714	36,170	38,714
Commercial & Industrial [Member]
Segment Reporting Information [Line Items]
Revenues	42,336	50,845	83,565	101,985
Cost of Services	36,484	47,460	73,799	93,958
Gross Profit	5,852	3,385	9,766	8,027
Selling, General and Administrative Expense	4,243	3,609	7,722	7,345
Loss (gain) on sale of assets	(21)	(9)	(24)	(19)
Operating Income (Loss)	1,630	(215)	2,068	701
Depreciation and amortization	66	59	133	115
Capital Expenditures	40	97	95	110
Assets	45,169	53,531	45,169	53,531
Infrastructure Solutions [Member]
Segment Reporting Information [Line Items]
Revenues	10,602	0	23,649	0
Cost of Services	8,221	0	18,415	0
Gross Profit	2,381	0	5,234	0
Selling, General and Administrative Expense	2,295	0	4,683	0
Loss (gain) on sale of assets	0	0	3	0
Operating Income (Loss)	86	0	548	0
Depreciation and amortization	217	0	484	0
Capital Expenditures	235	0	277	0
Assets	27,611	0	27,611	0
Corporate
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Cost of Services	0	0	0	0
Gross Profit	0	0	0	0
Selling, General and Administrative Expense	2,539	3,284	4,780	5,683
Loss (gain) on sale of assets	0	0	0	0
Operating Income (Loss)	(2,539)	(3,284)	(4,780)	(5,683)
Depreciation and amortization	117	299	203	599
Capital Expenditures	0	0	115	0
Assets	$ 36,383	$ 35,642	$ 36,383	$ 35,642