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Operating Segments (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Sep. 30, 2011
Segment Reporting Information [Line Items]          
Revenues $ 119,300 $ 122,714 $ 347,401 $ 350,851  
Cost of Services 106,321 113,668 310,926 325,420  
Gross profit 12,979 9,046 36,475 25,431  
Selling, General and Administrative Expense 15,525 18,142 44,121 50,866  
Corporate Allocations 0 0      
Loss (gain) on sale of assets (12) 137 (82) (6,680)  
Asset Impairment     0 3,551  
Restructuring charges 153 1,667 1,017 1,667  
Income (loss) from operations (2,687) (10,900) (8,581) (23,973)  
Depreciation and amortization (534) 1,499 1,592 4,967  
Assets 172,105 174,657 172,105 174,657 180,244
Communications
          
Segment Reporting Information [Line Items]          
Revenues 31,453 23,498 86,579 66,788  
Cost of Services 27,271 20,777 75,278 58,437  
Gross profit 4,182 2,721 11,301 8,351  
Selling, General and Administrative Expense 3,766 1,980 9,151 5,460  
Corporate Allocations 474 586 1,423 1,722  
Loss (gain) on sale of assets (1) 1 10 1  
Restructuring charges 0 0      
Income (loss) from operations (57) 154 717 1,168  
Depreciation and amortization (70) 20 210 68  
Assets 34,240 23,730 34,240 23,730  
Residential
          
Segment Reporting Information [Line Items]          
Revenues 35,232 30,111 94,132 82,465  
Cost of Services 29,655 25,050 79,376 69,338  
Gross profit 5,577 5,061 14,756 13,127  
Selling, General and Administrative Expense 4,691 3,963 12,694 12,094  
Corporate Allocations 472 539 1,415 1,699  
Loss (gain) on sale of assets 1 128 8 58  
Restructuring charges 0 0      
Income (loss) from operations 413 431 639 (724)  
Depreciation and amortization (99) 67 271 250  
Assets 29,201 22,163 29,201 22,163  
Commercial & Industrial
          
Segment Reporting Information [Line Items]          
Revenues 52,615 69,105 166,690 201,598  
Cost of Services 49,395 67,841 156,272 197,645  
Gross profit 3,220 1,264 10,418 3,953  
Selling, General and Administrative Expense 2,912 5,542 9,720 12,388  
Corporate Allocations 1,423 2,287 4,270 6,719  
Loss (gain) on sale of assets (12) (25) (100) (74)  
Restructuring charges 137 1,667 955 1,667  
Income (loss) from operations (1,240) (8,207) (4,427) (16,747)  
Depreciation and amortization (62) 160 219 553  
Assets 63,465 80,017 63,465 80,017  
Corporate
          
Segment Reporting Information [Line Items]          
Revenues   0   0  
Cost of Services   0 0 0  
Gross profit   0 0 0  
Selling, General and Administrative Expense 4,156 6,657 12,556 20,924  
Corporate Allocations (2,369) (3,412) (7,108) (10,140)  
Loss (gain) on sale of assets   33   (6,665)  
Asset Impairment       3,551  
Restructuring charges 16 0 62    
Income (loss) from operations (1,803) (3,278) (5,510) (7,670)  
Depreciation and amortization (303) 1,252 892 4,096  
Assets $ 45,199 $ 48,747 $ 45,199 $ 48,747