INDUSTRY SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014 item	Mar. 30, 2013	Dec. 28, 2013
INDUSTRY SEGMENT INFORMATION
Number of industry groups in which the entity operates	2
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	$ 26,824	$ 26,213
Depreciation, depletion and amortization	738	815
Operating (loss) income	(1,685)	(1,133)
Segment assets	72,893	71,962	71,962
Capital expenditures	807	419
Concrete, Aggregates & Construction Supplies
INDUSTRY SEGMENT INFORMATION
Number of companies	3
Revenues from external customers	10,318	7,817
Depreciation, depletion and amortization	456	578
Operating (loss) income	(1,583)	(1,948)
Segment assets	31,980	26,471
Capital expenditures	623	96
Doors
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	3,896	3,725
Depreciation, depletion and amortization	36	31
Operating (loss) income	395	116
Segment assets	6,469	6,837
Capital expenditures	34	36
Heating and Cooling
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	6,924	9,559
Depreciation, depletion and amortization	129	103
Operating (loss) income	(30)	1,295
Segment assets	15,253	18,748
Capital expenditures	56	66
Evaporative Cooling
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	5,683	5,081
Depreciation, depletion and amortization	105	90
Operating (loss) income	263	240
Segment assets	16,571	12,118
Capital expenditures	94	206
Unallocated Corporate
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	3	2
Depreciation, depletion and amortization	12	13
Operating (loss) income	(730)	(710)
Segment assets	2,487	7,654
Capital expenditures		15
Other
INDUSTRY SEGMENT INFORMATION
Revenues from external customers		29
Operating (loss) income		(126)
Segment assets	133	134
Construction Products
INDUSTRY SEGMENT INFORMATION
Number of reportable segments	2
Revenues from external customers	14,214	11,542
Depreciation, depletion and amortization	492	609
Operating (loss) income	(1,188)	(1,832)
Segment assets	38,449	33,308
Capital expenditures	657	132
HVAC Products
INDUSTRY SEGMENT INFORMATION
Number of reportable segments	2
Revenues from external customers	12,607	14,640
Depreciation, depletion and amortization	234	193
Operating (loss) income	233	1,535
Segment assets	31,824	30,866
Capital expenditures	$ 150	$ 272