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Operation Segments (Tables) | 12 Months Ended
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Sep. 30, 2014
Operating Segments [Abstract] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Years Ended September 30, 2014
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 116,073 |  | $ | 182,514 |  | $ | 166,249 |  | $ | 47,559 |  | $ | - |  | $ | 512,395
Cost of services |  |  | 94,904 |  |  | 148,685 |  |  | 148,081 |  |  | 37,599 |  |  | - |  |  | 429,269
Gross profit |  |  | 21,169 |  |  | 33,829 |  |  | 18,168 |  |  | 9,960 |  |  | - |  |  | 83,126
Selling, general and administrative |  |  | 13,481 |  |  | 27,947 |  |  | 14,479 |  |  | 9,346 |  |  | 10,318 |  |  | 75,571
Gain on sale of assets |  |  | 6 |  |  | 4 |  |  | (46) |  |  | (50) |  |  | - |  |  | (86)
Income (loss) from operations |  | $ | 7,682 |  | $ | 5,878 |  | $ | 3,735 |  | $ | 664 |  | $ | (10,318) |  | $ | 7,641
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 414 |  | $ | 491 |  | $ | 270 |  | $ | 980 |  | $ | 371 |  | $ | 2,526
| Capital expenditures |  |  | 331 |  |  | 420 |  |  | 266 |  |  | 828 |  |  | 137 |  |  | 1,982
| Total assets |  | $ | 30,415 |  | $ | 40,555 |  | $ | 43,937 |  | $ | 27,272 |  | $ | 58,929 |  | $ | 201,108
|  | 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
Loss (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

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