SEGMENT INFORMATION (Details) (USD $)	3 Months Ended								12 Months Ended
	Jan. 02, 2015	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 27, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Jan. 02, 2015 segment	Dec. 27, 2013	Dec. 28, 2012	Dec. 30, 2011
SEGMENT INFORMATION
Number of reporting segments									4
Number of operating segments									4
Contract revenue	$ 30,237,000	$ 28,187,000	$ 26,970,000	$ 22,686,000	$ 22,462,000	$ 21,167,000	$ 20,496,000	$ 21,385,000	$ 108,080,000	$ 85,510,000	$ 93,443,000
Depreciation and amortization									459,000	517,000	671,000
Interest (income) expense									16,000	94,000	106,000
Segment profit before income taxes									8,426,000	2,762,000	(19,383,000)
Income tax (benefit) expense	366,000	(1,464,000)	64,000	44,000	47,000	44,000	(8,000)	49,000	(990,000)	132,000	(2,083,000)
Net income (loss)	2,047,000	4,161,000	1,893,000	1,315,000	701,000	842,000	688,000	399,000	9,416,000	2,630,000	(17,300,000)
Segment assets	54,659,000				38,237,000				54,659,000	38,237,000	41,977,000
Assets:
Cash and cash equivalents	20,371,000				8,134,000				20,371,000	8,134,000	10,006,000	3,001,000
Prepaid expenses	2,244,000				2,377,000				2,244,000	2,377,000
Other receivables	208,000				212,000				208,000	212,000
Equipment and leasehold improvements, net	1,384,000				691,000				1,384,000	691,000
Other	535,000				333,000				535,000	333,000
Engineering Services
SEGMENT INFORMATION
Contract revenue									40,783,000	35,217,000	34,026,000
Depreciation and amortization									191,000	214,000	256,000
Interest (income) expense									(17,000)	68,000	50,000
Segment profit before income taxes										1,125,000	(726,000)
Income tax (benefit) expense										53,000	(115,000)
Net income (loss)										1,072,000	(611,000)
Energy Efficiency Services
SEGMENT INFORMATION
Contract revenue									52,941,000	36,041,000	45,549,000
Depreciation and amortization									212,000	223,000	262,000
Interest (income) expense									33,000	25,000	52,000
Segment profit before income taxes										710,000	(19,314,000)
Income tax (benefit) expense										45,000	(2,211,000)
Net income (loss)										665,000	(17,103,000)
Public Finance Services
SEGMENT INFORMATION
Contract revenue									10,630,000	9,845,000	9,780,000
Depreciation and amortization									39,000	41,000	53,000
Interest (income) expense									(2,000)	3,000	1,000
Segment profit before income taxes										535,000	930,000
Income tax (benefit) expense										17,000	344,000
Net income (loss)										518,000	586,000
Homeland Security Services
SEGMENT INFORMATION
Contract revenue									3,726,000	4,407,000	4,088,000
Depreciation and amortization									18,000	39,000	100,000
Interest (income) expense									2,000	(2,000)	3,000
Segment profit before income taxes										392,000	(273,000)
Income tax (benefit) expense										17,000	(101,000)
Net income (loss)										375,000	(172,000)
Reporting Segments | Engineering Services
SEGMENT INFORMATION
Segment profit before income taxes									4,008,000
Income tax (benefit) expense									(454,000)
Net income (loss)									4,462,000
Segment assets	11,166,000				10,436,000				11,166,000	10,436,000	9,237,000
Reporting Segments | Energy Efficiency Services
SEGMENT INFORMATION
Segment profit before income taxes									4,814,000
Income tax (benefit) expense									(599,000)
Net income (loss)									5,413,000
Segment assets	11,769,000				10,305,000				11,769,000	10,305,000	13,256,000
Reporting Segments | Public Finance Services
SEGMENT INFORMATION
Segment profit before income taxes									661,000
Income tax (benefit) expense									(64,000)
Net income (loss)									725,000
Segment assets	3,944,000				3,528,000				3,944,000	3,528,000	3,411,000
Reporting Segments | Homeland Security Services
SEGMENT INFORMATION
Segment profit before income taxes									443,000
Income tax (benefit) expense									(49,000)
Net income (loss)									492,000
Segment assets	708,000				1,406,000				708,000	1,406,000	1,371,000
Unallocated Corporate
SEGMENT INFORMATION
Segment profit before income taxes									(1,500,000)
Income tax (benefit) expense									176,000
Net income (loss)									(1,676,000)
Segment assets	50,202,000				35,692,000				50,202,000	35,692,000	37,831,000
Assets:
Cash and cash equivalents	20,371,000				7,341,000				20,371,000	7,341,000	9,881,000
Prepaid expenses	1,404,000				1,206,000				1,404,000	1,206,000	1,041,000
Intercompany receivables	85,259,000				114,800,000				85,259,000	114,800,000	113,615,000
Other receivables	19,000				73,000				19,000	73,000	49,000
Equipment and leasehold improvements, net	440,000				177,000				440,000	177,000	194,000
Investments in subsidiaries	23,130,000				23,130,000				23,130,000	23,130,000	23,130,000
Other	4,640,000				3,765,000				4,640,000	3,765,000	3,536,000
Total assets	135,263,000				150,492,000				135,263,000	150,492,000	151,446,000
Intersegment
SEGMENT INFORMATION
Segment assets	$ (23,130,000)				$ (23,130,000)				$ (23,130,000)	$ (23,130,000)	$ (23,129,000)