Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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Segment Reporting - Selected Financial Details Regarding the Company's Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 13,693us-gaap_SalesRevenueNet	$ 14,283us-gaap_SalesRevenueNet	$ 13,430us-gaap_SalesRevenueNet	$ 15,848us-gaap_SalesRevenueNet	$ 16,496us-gaap_SalesRevenueNet	$ 16,236us-gaap_SalesRevenueNet	$ 13,499us-gaap_SalesRevenueNet	$ 13,008us-gaap_SalesRevenueNet	$ 57,254us-gaap_SalesRevenueNet	$ 59,239us-gaap_SalesRevenueNet
Gross profit (loss)	37us-gaap_GrossProfit	495us-gaap_GrossProfit	2,028us-gaap_GrossProfit	2,435us-gaap_GrossProfit	3,554us-gaap_GrossProfit	2,759us-gaap_GrossProfit	2,089us-gaap_GrossProfit	2,765us-gaap_GrossProfit	4,995us-gaap_GrossProfit	11,167us-gaap_GrossProfit
Income (loss) from continuing operations									(3,895)us-gaap_OperatingIncomeLoss	3,162us-gaap_OperatingIncomeLoss
Corporate and other unallocated expenses
Segment Reporting Information [Line Items]
Income (loss) from continuing operations									(7,597)	(6,995)
Technical Products and Services
Segment Reporting Information [Line Items]
Net sales									49,967	49,150
Gross profit (loss)									4,132	9,072
Technical Products and Services \| Operating Segments
Segment Reporting Information [Line Items]
Income (loss) from continuing operations									3,177	8,061
Electrical and Instrumentation Construction
Segment Reporting Information [Line Items]
Net sales									7,287	10,089
Gross profit (loss)									863	2,095
Electrical and Instrumentation Construction \| Operating Segments
Segment Reporting Information [Line Items]
Income (loss) from continuing operations									$ 525	$ 2,096