Segment Information - Financial Data by Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Sales to external customers	$ 19,152	$ 17,651
Operating income	625	513
Interest expense, net	83	69
Other expense, net	19	3
Consolidated income before income taxes	523	441
Assets	61,781		68,079
United States
Sales to external customers	16,105	14,227
Operating income	676	564
Assets	51,542		57,068
Canada
Sales to external customers	1,510	1,625
Operating income	32	(10)
Assets	5,555		5,329
Europe
Sales to external customers	1,537	1,799
Operating income	(83)	(41)
Assets	$ 4,684		$ 5,682

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.

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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.

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The net amount of operating interest income (expense).

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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.

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