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SEGMENT INFORMATION (Details) (USD $) | 3 Months Ended | 12 Months Ended |
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Dec. 27, 2013 | Sep. 27, 2013 | Jun. 28, 2013 | Mar. 29, 2013 | Dec. 28, 2012 | Sep. 28, 2012 | Jun. 29, 2012 | Mar. 30, 2012 | Dec. 27, 2013 segment | Dec. 28, 2012 | Dec. 30, 2011 | Dec. 31, 2010
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Number of reporting segments |  |  |  |  |  |  |  |  | 4 |  |  |
Number of operating segments |  |  |  |  |  |  |  |  | 4 |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue | $ 22,462,000 | $ 21,167,000 | $ 20,496,000 | $ 21,385,000 | $ 22,947,000 | $ 21,547,000 | $ 23,481,000 | $ 25,468,000 | $ 85,510,000 | $ 93,443,000 | $ 107,165,000 |
Depreciation and amortization |  |  |  |  |  |  |  |  | 517,000 | 671,000 | 877,000 |
Interest (income) expense |  |  |  |  |  |  |  |  | 94,000 | 106,000 | 77,000 |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  | 2,762,000 | (19,383,000) | 3,330,000 |
Income tax expense (benefit) | 47,000 | 44,000 | (8,000) | 49,000 | 908,000 | 593,000 | (2,657,000) | (927,000) | 132,000 | (2,083,000) | 1,500,000 |
Net income (loss) | 701,000 | 842,000 | 688,000 | 399,000 | 300,000 | 787,000 | (16,976,000) | (1,411,000) | 2,630,000 | (17,300,000) | 1,830,000 |
Segment assets | 38,237,000 |  |  |  | 41,977,000 |  |  |  | 38,237,000 | 41,977,000 | 64,311,000 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents, including restricted cash | 8,134,000 |  |  |  | 10,006,000 |  |  |  | 8,134,000 | 10,006,000 | 3,001,000 | 6,642,000
Prepaid expenses | 2,377,000 |  |  |  | 1,782,000 |  |  |  | 2,377,000 | 1,782,000 |  |
Other receivables | 212,000 |  |  |  | 95,000 |  |  |  | 212,000 | 95,000 |  |
Equipment and leasehold improvements, net | 691,000 |  |  |  | 979,000 |  |  |  | 691,000 | 979,000 |  |
Other | 333,000 |  |  |  | 307,000 |  |  |  | 333,000 | 307,000 |  |
Engineering Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  |  |  |  |  |  |  |  | 35,217,000 | 34,026,000 | 33,850,000 |
Depreciation and amortization |  |  |  |  |  |  |  |  | 214,000 | 256,000 | 372,000 |
Interest (income) expense |  |  |  |  |  |  |  |  | (68,000) | 50,000 | 93,000 |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  | 1,125,000 | (726,000) |  |
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 53,000 | (115,000) |  |
Net income (loss) |  |  |  |  |  |  |  |  | 1,072,000 | (611,000) |  |
Energy Efficiency Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  |  |  |  |  |  |  |  | 36,041,000 | 45,549,000 | 57,731,000 |
Depreciation and amortization |  |  |  |  |  |  |  |  | 223,000 | 262,000 | 306,000 |
Interest (income) expense |  |  |  |  |  |  |  |  | (25,000) | 52,000 | (21,000) |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  | 710,000 | (19,314,000) |  |
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 45,000 | (2,211,000) |  |
Net income (loss) |  |  |  |  |  |  |  |  | 665,000 | (17,103,000) |  |
Public Finance Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  |  |  |  |  |  |  |  | 9,845,000 | 9,780,000 | 9,687,000 |
Depreciation and amortization |  |  |  |  |  |  |  |  | 41,000 | 53,000 | 67,000 |
Interest (income) expense |  |  |  |  |  |  |  |  | (3,000) | 1,000 | (5,000) |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  | 535,000 | 930,000 |  |
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 17,000 | 344,000 |  |
Net income (loss) |  |  |  |  |  |  |  |  | 518,000 | 586,000 |  |
Homeland Security Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Contract revenue |  |  |  |  |  |  |  |  | 4,407,000 | 4,088,000 | 5,897,000 |
Depreciation and amortization |  |  |  |  |  |  |  |  | 39,000 | 100,000 | 132,000 |
Interest (income) expense |  |  |  |  |  |  |  |  | 2,000 | 3,000 | 10,000 |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  | 392,000 | (273,000) |  |
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 17,000 | (101,000) |  |
Net income (loss) |  |  |  |  |  |  |  |  | 375,000 | (172,000) |  |
Reporting segments | Engineering Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  |  |  | (158,000) |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 7,000 |
Net income (loss) |  |  |  |  |  |  |  |  |  |  | (165,000) |
Segment assets | 10,436,000 |  |  |  | 9,237,000 |  |  |  | 10,436,000 | 9,237,000 | 9,667,000 |
Reporting segments | Energy Efficiency Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  |  |  | 3,271,000 |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 1,296,000 |
Net income (loss) |  |  |  |  |  |  |  |  |  |  | 1,975,000 |
Segment assets | 10,305,000 |  |  |  | 13,256,000 |  |  |  | 10,305,000 | 13,256,000 | 39,416,000 |
Reporting segments | Public Finance Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  |  |  | 1,116,000 |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 469,000 |
Net income (loss) |  |  |  |  |  |  |  |  |  |  | 647,000 |
Segment assets | 3,528,000 |  |  |  | 3,411,000 |  |  |  | 3,528,000 | 3,411,000 | 4,008,000 |
Reporting segments | Homeland Security Services |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  |  |  | (299,000) |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | (67,000) |
Net income (loss) |  |  |  |  |  |  |  |  |  |  | (232,000) |
Segment assets | 1,406,000 |  |  |  | 1,371,000 |  |  |  | 1,406,000 | 1,371,000 | 2,010,000 |
Unallocated Corporate |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss) before income tax expense |  |  |  |  |  |  |  |  |  |  | (600,000) |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | (205,000) |
Net income (loss) |  |  |  |  |  |  |  |  |  |  | (395,000) |
Segment assets | 35,692,000 |  |  |  | 37,831,000 |  |  |  | 35,692,000 | 37,831,000 | 32,339,000 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents, including restricted cash | 7,341,000 |  |  |  | 9,881,000 |  |  |  | 7,341,000 | 9,881,000 | 2,378,000 |
Prepaid expenses | 1,206,000 |  |  |  | 1,041,000 |  |  |  | 1,206,000 | 1,041,000 | 1,268,000 |
Intercompany receivables | 114,800,000 |  |  |  | 113,615,000 |  |  |  | 114,800,000 | 113,615,000 | 117,937,000 |
Other receivables | 73,000 |  |  |  | 49,000 |  |  |  | 73,000 | 49,000 | 41,000 |
Equipment and leasehold improvements, net | 177,000 |  |  |  | 194,000 |  |  |  | 177,000 | 194,000 | 329,000 |
Investments in subsidiaries | 23,130,000 |  |  |  | 23,130,000 |  |  |  | 23,130,000 | 23,130,000 | 23,130,000 |
Other | 3,765,000 |  |  |  | 3,536,000 |  |  |  | 3,765,000 | 3,536,000 | 5,194,000 |
Total assets | 150,492,000 |  |  |  | 151,446,000 |  |  |  | 150,492,000 | 151,446,000 | 150,277,000 |
Intersegment |  |  |  |  |  |  |  |  |  |  |  |
SEGMENT INFORMATION |  |  |  |  |  |  |  |  |  |  |  |
Segment assets | $ (23,130,000) |  |  |  | $ (23,129,000) |  |  |  | $ (23,130,000) | $ (23,129,000) | $ (23,129,000) |

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