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Operation Segments (Tables) | 6 Months Ended
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Mar. 31, 2014
Operating Segments [Abstract] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Three Months Ended March 31, 2014
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 25,147 |  | $ | 42,181 |  | $ | 42,336 |  | $ | 10,602 |  | $ | - |  | $ | 120,266
Cost of services |  |  | 21,006 |  |  | 34,529 |  |  | 36,484 |  |  | 8,221 |  |  | - |  |  | 100,240
Gross profit |  |  | 4,141 |  |  | 7,652 |  |  | 5,852 |  |  | 2,381 |  |  | - |  |  | 20,026
Selling, general and administrative |  |  | 3,163 |  |  | 6,932 |  |  | 4,243 |  |  | 2,295 |  |  | 2,539 |  |  | 19,172
Loss (gain) on sale of assets |  |  | - |  |  | (1) |  |  | (21) |  |  | - |  |  | - |  |  | (22)
Income (loss) from operations |  | $ | 978 |  | $ | 721 |  | $ | 1,630 |  | $ | 86 |  | $ | (2,539) |  | $ | 876
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 102 |  | $ | 118 |  | $ | 66 |  | $ | 217 |  | $ | 117 |  | $ | 620
| Capital expenditures |  |  | 55 |  |  | 158 |  |  | 40 |  |  | 235 |  |  | - |  |  | 488
| Total assets |  | $ | 25,010 |  | $ | 36,170 |  | $ | 45,169 |  | $ | 27,611 |  | $ | 36,383 |  | $ | 170,343
|  | Three Months Ended March 31, 2013
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 31,806 |  | $ | 39,344 |  | $ | 50,845 |  | $ | - |  | $ | - |  | $ | 121,995
Cost of services |  |  | 25,975 |  |  | 32,564 |  |  | 47,460 |  |  | - |  |  | - |  |  | 105,999
Gross profit |  |  | 5,831 |  |  | 6,780 |  |  | 3,385 |  |  | - |  |  | - |  |  | 15,996
Selling, general and administrative |  |  | 3,301 |  |  | 6,412 |  |  | 3,609 |  |  | - |  |  | 3,284 |  |  | 16,606
Loss (gain) on sale of assets |  |  | - |  |  | (12) |  |  | (9) |  |  | - |  |  | - |  |  | (21)
Income (loss) from operations |  | $ | 2,530 |  | $ | 380 |  | $ | (215) |  | $ | - |  | $ | (3,284) |  | $ | (589)
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 92 |  | $ | 89 |  | $ | 59 |  | $ | - |  | $ | 299 |  | $ | 539
| Capital expenditures |  |  | 130 |  |  | 68 |  |  | 97 |  |  | - |  |  | - |  |  | 295
| Total assets |  | $ | 25,366 |  | $ | 38,714 |  | $ | 53,531 |  | $ | - |  | $ | 35,642 |  | $ | 153,253
|  | Six Months Ended March 31, 2014
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 49,738 |  | $ | 83,393 |  | $ | 83,565 |  | $ | 23,649 |  | $ | - |  | $ | 240,345
Cost of services |  |  | 41,665 |  |  | 68,323 |  |  | 73,799 |  |  | 18,415 |  |  | - |  |  | 202,202
Gross profit |  |  | 8,073 |  |  | 15,070 |  |  | 9,766 |  |  | 5,234 |  |  | - |  |  | 38,143
Selling, general and administrative |  |  | 6,145 |  |  | 13,414 |  |  | 7,722 |  |  | 4,683 |  |  | 4,780 |  |  | 36,744
Loss (gain) on sale of assets |  |  | - |  |  | (41) |  |  | (24) |  |  | 3 |  |  | - |  |  | (62)
Income (loss) from operations |  | $ | 1,928 |  | $ | 1,697 |  | $ | 2,068 |  | $ | 548 |  | $ | (4,780) |  | $ | 1,461
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 201 |  | $ | 241 |  | $ | 133 |  | $ | 484 |  | $ | 203 |  | $ | 1,262
| Capital expenditures |  |  | 63 |  |  | 163 |  |  | 95 |  |  | 277 |  |  | 115 |  |  | 713
| Total assets |  | $ | 25,010 |  | $ | 36,170 |  | $ | 45,169 |  | $ | 27,611 |  | $ | 36,383 |  | $ | 170,343
|  | Six Months Ended March 31, 2013
|  |  |  |  |  |  |  |  | Commercial & |  | Infrastructure |  |  |  |  |  |
|  |  | Communications |  | Residential |  | Industrial |  | Solutions |  | Corporate |  | Total
Revenues |  | $ | 71,925 |  | $ | 75,349 |  | $ | 101,985 |  | $ | - |  | $ | - |  | $ | 249,259
Cost of services |  |  | 58,862 |  |  | 62,463 |  |  | 93,958 |  |  | - |  |  | - |  |  | 215,283
Gross profit |  |  | 13,063 |  |  | 12,886 |  |  | 8,027 |  |  | - |  |  | - |  |  | 33,976
Selling, general and administrative |  |  | 6,860 |  |  | 11,640 |  |  | 7,345 |  |  | - |  |  | 5,683 |  |  | 31,528
Loss (gain) on sale of assets |  |  | - |  |  | (21) |  |  | (19) |  |  | - |  |  | - |  |  | (40)
Income (loss) from operations |  | $ | 6,203 |  | $ | 1,267 |  | $ | 701 |  | $ | - |  | $ | (5,683) |  | $ | 2,488
Other data: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Depreciation and amortization expense |  | $ | 179 |  | $ | 185 |  | $ | 115 |  | $ | - |  | $ | 599 |  | $ | 1,078
| Capital expenditures |  |  | 171 |  |  | 94 |  |  | 110 |  |  | - |  |  | - |  |  | 375
| Total assets |  | $ | 25,366 |  | $ | 38,714 |  | $ | 53,531 |  | $ | - |  | $ | 35,642 |  | $ | 153,253

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