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Segment Information - Financial Data by Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Sales to external customers	$ 27,594	$ 24,029	$ 44,472	$ 38,430
Operating income (loss)	3,078	2,460	3,536	2,643
Interest expense, net	62	74	117	121
Other expense (income), net	43	3	86	(22)
Consolidated income before taxes	2,973	2,383	3,333	2,544
United States
Sales to external customers	22,563	18,527	35,160	29,086
Operating income (loss)	2,587	1,862	2,753	1,983
Canada
Sales to external customers	3,310	3,324	4,967	5,178
Operating income (loss)	521	599	571	749
Europe
Sales to external customers	1,721	2,178	4,345	4,166
Operating income (loss)	$ (30)	$ (1)	$ 212	$ (89)

X

- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

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

-Publisher SEC

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X

- Definition

The net amount of operating interest income (expense).

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 10

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

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-Name Accounting Standards Codification

-Topic 942

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

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No definition available.

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- Definition

The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

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- Definition

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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-Publisher SEC

-Name Regulation S-X (SX)

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