INDUSTRY SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended
Apr. 01, 2017 USD ($) item	Apr. 02, 2016 USD ($)	Dec. 31, 2016 USD ($)
INDUSTRY SEGMENT INFORMATION
Number of industry groups in which the entity operates \| item	2
Number of reportable segments \| item	2
Revenues from external customers	$ 34,103	$ 34,228
Depreciation, depletion and amortization	638	639
Operating (loss) income	(611)	852
Segment assets (a)	80,501	78,008	$ 78,008
Capital expenditures (b)	630	1,082
Unallocated Corporate
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	6	4
Depreciation, depletion and amortization	8	4
Operating (loss) income	(827)	(751)
Segment assets (a)	2,974	3,653
Capital expenditures (b)	6
Concrete Aggregates and Construction Supplies
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	13,483	12,199
Depreciation, depletion and amortization	337	347
Operating (loss) income	(584)	(194)
Segment assets (a)	34,863	33,518
Capital expenditures (b)	382	919
Doors
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	3,869	3,855
Depreciation, depletion and amortization	35	31
Operating (loss) income	292	310
Segment assets (a)	6,865	6,173
Capital expenditures (b)	101	22
Heating and Cooling
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	10,436	11,150
Depreciation, depletion and amortization	151	138
Operating (loss) income	565	1,034
Segment assets (a)	20,085	22,381
Capital expenditures (b)	98	117
Evaporative Cooling
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	6,309	7,020
Depreciation, depletion and amortization	107	119
Operating (loss) income	(57)	453
Segment assets (a)	15,714	12,283
Capital expenditures (b)	43	24
Construction Products Industry
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	17,352	16,054
Depreciation, depletion and amortization	372	378
Operating (loss) income	(292)	116
Segment assets (a)	41,728	39,691
Capital expenditures (b)	483	941
HVAC Industry
INDUSTRY SEGMENT INFORMATION
Revenues from external customers	16,745	18,170
Depreciation, depletion and amortization	258	257
Operating (loss) income	508	1,487
Segment assets (a)	35,799	34,664
Capital expenditures (b)	$ 141	$ 141

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The net result for the period of deducting operating expenses from operating revenues.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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