Operating Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenues	$ 127,264	$ 108,998
Cost of Services	109,284	95,805
Gross Profit	17,980	13,193
Selling, General and Administrative Expense	14,922	12,655
Loss (gain) on sale of assets	(19)	(137)
Asset Impairment	0	0
Restructuring charges for continuing operations	0	0
Operating Income (Loss)	3,077	675
Depreciation and amortization	539	500
Capital Expenditures	80	1,163
Assets	165,158	161,962	164,713
Communications
Segment Reporting Information [Line Items]
Revenues	40,119	25,162
Cost of Services	32,887	21,597
Gross Profit	7,232	3,565
Selling, General and Administrative Expense	3,558	2,710
Loss (gain) on sale of assets	1	(61)
Operating Income (Loss)	3,673	916
Depreciation and amortization	87	52
Capital Expenditures	41	42
Assets	34,072	17,899
Residential
Segment Reporting Information [Line Items]
Revenues	36,005	29,272
Cost of Services	29,899	24,626
Gross Profit	6,106	4,646
Selling, General and Administrative Expense	5,228	4,414
Loss (gain) on sale of assets	(9)	4
Operating Income (Loss)	887	228
Depreciation and amortization	95	82
Capital Expenditures	26	260
Assets	31,914	23,095
Commercial & Industrial
Segment Reporting Information [Line Items]
Revenues	51,140	54,564
Cost of Services	46,498	49,582
Gross Profit	4,642	4,982
Selling, General and Administrative Expense	3,736	4,071
Loss (gain) on sale of assets	(11)	(80)
Operating Income (Loss)	917	991
Depreciation and amortization	57	79
Capital Expenditures	13	0
Assets	54,436	73,383
Corporate
Segment Reporting Information [Line Items]
Selling, General and Administrative Expense	2,400	1,460
Loss (gain) on sale of assets	0	0
Operating Income (Loss)	(2,400)	(1,460)
Depreciation and amortization	300	287
Capital Expenditures	0	861
Assets	$ 44,736	$ 47,585