Operating Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenues	$ 135,858	$ 136,192	$ 120,266	$ 120,079	$ 123,782	$ 121,552	$ 121,995	$ 127,264	$ 512,395	$ 494,593	$ 456,115
Cost of Services									429,269	427,633	398,063
Gross Profit	22,318	22,666	20,026	18,116	17,331	15,653	15,996	17,980	83,126	66,960	58,052
Selling, General and Administrative Expense									75,571	66,598	58,609
Loss (gain) on sale of assets									(86)	(64)	(168)
Operating Income (Loss)									7,641	426	(389)
Depreciation and amortization									2,526	2,552	2,075
Capital Expenditures									1,982	753	1,877
Assets	201,108				179,252				201,108	179,252	164,713
Communications [Member]
Segment Reporting Information [Line Items]
Revenues									116,073	126,348	121,492
Cost of Services									94,904	102,564	103,288
Gross Profit									21,169	23,784	18,204
Selling, General and Administrative Expense									13,481	13,610	13,431
Loss (gain) on sale of assets									6	0	(60)
Operating Income (Loss)									7,682	10,174	4,833
Depreciation and amortization									414	372	260
Capital Expenditures									331	269	569
Assets	30,415				24,858				30,415	24,858	29,603
Residential
Segment Reporting Information [Line Items]
Revenues									182,514	162,611	129,974
Cost of Services									148,685	135,384	109,274
Gross Profit									33,829	27,227	20,700
Selling, General and Administrative Expense									27,947	25,447	19,703
Loss (gain) on sale of assets									4	(17)	24
Operating Income (Loss)									5,878	1,797	973
Depreciation and amortization									491	807	375
Capital Expenditures									420	209	666
Assets	40,555				36,838				40,555	36,838	33,927
Commercial & Industrial [Member]
Segment Reporting Information [Line Items]
Revenues									166,249	203,481	204,649
Cost of Services									148,081	187,957	185,501
Gross Profit									18,168	15,524	19,148
Selling, General and Administrative Expense									14,479	14,362	17,166
Loss (gain) on sale of assets									(46)	(46)	(132)
Operating Income (Loss)									3,735	1,208	2,114
Depreciation and amortization									270	247	244
Capital Expenditures									266	270	341
Assets	43,937				55,342				43,937	55,342	65,929
MISCOR [Member]
Segment Reporting Information [Line Items]
Revenues									47,559	2,153	0
Cost of Services									37,599	1,728	0
Gross Profit									9,960	425	0
Selling, General and Administrative Expense									9,346	337	0
Loss (gain) on sale of assets									(50)	0	0
Operating Income (Loss)									664	88	0
Depreciation and amortization									980	38	0
Capital Expenditures									828	5	0
Assets	27,272				27,889				27,272	27,889	0
Corporate
Segment Reporting Information [Line Items]
Revenues									0	0	0
Cost of Services									0	0	0
Gross Profit									0	0	0
Selling, General and Administrative Expense									10,318	12,842	8,309
Loss (gain) on sale of assets									0	(1)	0
Operating Income (Loss)									(10,318)	(12,841)	(8,309)
Depreciation and amortization									371	1,088	1,196
Capital Expenditures									137	0	301
Assets	$ 58,929				$ 34,325				$ 58,929	$ 34,325	$ 35,254