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Operation Segments (Tables) | 12 Months Ended
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Sep. 30, 2013
Operating Segments [Abstract] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Years Ended September 30, 2013
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 126,348 |  | $ | 162,611 |  | $ | 203,481 |  | $ | 2,153 |  | $ | - |  | $ | 494,593
Cost of services |  |  | 102,564 |  |  | 135,384 |  |  | 187,957 |  |  | 1,728 |  |  | - |  |  | 427,633
Gross profit |  |  | 23,784 |  |  | 27,227 |  |  | 15,524 |  |  | 425 |  |  | - |  |  | 66,960
Selling, general and administrative |  |  | 13,610 |  |  | 25,447 |  |  | 14,362 |  |  | 337 |  |  | 12,842 |  |  | 66,598
Gain on sale of assets |  |  | - |  |  | (17) |  |  | (46) |  |  | - |  |  | (1) |  |  | (64)
Income (loss) from operations |  | $ | 10,174 |  | $ | 1,797 |  | $ | 1,208 |  | $ | 88 |  | $ | (12,841) |  | $ | 426
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 372 |  | $ | 807 |  | $ | 247 |  | $ | 38 |  | $ | 1,088 |  | $ | 2,552
| Capital expenditures |  |  | 269 |  |  | 209 |  |  | 270 |  |  | 5 |  |  | - |  |  | 753
| Total assets |  | $ | 24,858 |  | $ | 36,838 |  | $ | 55,342 |  | $ | 27,889 |  | $ | 34,325 |  | $ | 179,252
|  | Years Ended September 30, 2012
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 121,492 |  | $ | 129,974 |  | $ | 204,649 |  | $ | - |  | $ | - |  | $ | 456,115
Cost of services |  |  | 103,288 |  |  | 109,274 |  |  | 185,501 |  |  | - |  |  | - |  |  | 398,063
Gross profit |  |  | 18,204 |  |  | 20,700 |  |  | 19,148 |  |  | - |  |  | - |  |  | 58,052
Selling, general and administrative |  |  | 13,431 |  |  | 19,703 |  |  | 17,166 |  |  | - |  |  | 8,309 |  |  | 58,609
Loss (gain) on sale of assets |  |  | (60) |  |  | 24 |  |  | (132) |  |  | - |  |  | - |  |  | (168)
Income (loss) from operations |  | $ | 4,833 |  | $ | 973 |  | $ | 2,114 |  | $ | - |  | $ | (8,309) |  | $ | (389)
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 260 |  | $ | 375 |  | $ | 244 |  | $ | - |  | $ | 1,196 |  | $ | 2,075
| Capital expenditures |  |  | 569 |  |  | 666 |  |  | 341 |  |  | - |  |  | 301 |  |  | 1,877
| Total assets |  | $ | 29,603 |  | $ | 33,927 |  | $ | 65,929 |  | $ | - |  | $ | 35,254 |  | $ | 164,713
|  | Years Ended September 30, 2011
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 83,615 |  | $ | 114,732 |  | $ | 207,794 |  | $ | - |  | $ | - |  | $ | 406,141
Cost of services |  |  | 71,142 |  |  | 96,042 |  |  | 194,573 |  |  | - |  |  | - |  |  | 361,757
Gross profit |  |  | 12,473 |  |  | 18,690 |  |  | 13,221 |  |  | - |  |  | - |  |  | 44,384
Selling, general and administrative |  |  | 9,578 |  |  | 18,441 |  |  | 21,788 |  |  | - |  |  | 13,514 |  |  | 63,321
Loss (gain) on sale of assets |  |  | - |  |  | 116 |  |  | (33) |  |  | - |  |  | (6,638) |  |  | (6,555)
Asset Impairment |  |  | 72 |  |  | - |  |  | 71 |  |  | - |  |  | 4,661 |  |  | 4,804
Income (loss) from operations |  | $ | 2,823 |  | $ | 133 |  | $ | (8,605) |  | $ | - |  | $ | (11,537) |  | $ | (17,186)
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 278 |  | $ | 514 |  | $ | 1,575 |  | $ | - |  | $ | 3,849 |  | $ | 6,216
| Capital expenditures |  |  | 928 |  |  | 181 |  |  | 431 |  |  | - |  |  | 1,148 |  |  | 2,688
| Total assets |  | $ | 23,073 |  | $ | 23,584 |  | $ | 79,506 |  | $ | - |  | $ | 54,081 |  | $ | 180,244

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