Acquisitions (Details)	3 Months Ended								12 Months Ended						0 Months Ended	12 Months Ended					0 Months Ended	12 Months Ended
	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2012 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	May 09, 2013 Trade names USD ($)	May 09, 2013 Customer relationships USD ($)	May 09, 2013 Technical know-how USD ($)	May 09, 2013 Forkardt USD ($)	Dec. 31, 2013 Forkardt USD ($)	Dec. 31, 2012 Forkardt USD ($)	Dec. 31, 2013 Forkardt Trade names USD ($)	Dec. 31, 2013 Forkardt Swiss business USD ($)	Dec. 31, 2013 Forkardt Swiss business CHF	Dec. 20, 2012 Usach USD ($)	Dec. 31, 2012 Usach USD ($)	Dec. 31, 2013 Usach Trade names USD ($)	Dec. 20, 2012 Usach Maximum USD ($)
Acquisitions
Bank debt used in funding of acquisition															$ 24,300,000
Percentage of issued and outstanding capital stock acquired																					100.00%
Cash used in funding of acquisition															10,000,000				6,300,000	5,600,000	11,300,000
Purchase price less cash acquired									34,250,000	8,768,000					34,300,000
Sales	103,102,000	79,783,000	79,355,000	67,219,000	90,560,000	82,883,000	86,320,000	74,650,000	329,459,000	334,413,000	341,573,000					27,800,000			6,100,000
Net income	6,143,000	1,479,000	2,265,000	40,000	7,752,000	4,020,000	3,640,000	2,443,000	9,927,000	17,855,000	11,986,000					600,000			600,000
Inventory step up charges associated with acquisition									(1,927,000)							1,000,000
Acquisition related costs									(2,154,000)	(290,000)						2,200,000						300,000
Earn-out provision comprising of purchase price																					7,500,000			7,500,000
Weighted average life of the intangible assets acquired															17 years 3 months 18 days						16 years 4 months 24 days
Goodwill deductible for tax purposes															400,000
Assets Acquired
Cash and cash equivalents																					2,482,000
Accounts receivable															5,521,000						2,514,000
Inventory															5,357,000						5,167,000
Other current assets															1,180,000						788,000
Property, plant and equipment															6,271,000						62,000
Other non-current assets															105,000
Trade name, customer list, and other intangible assets												5,300,000	4,300,000	5,000,000	14,614,000						9,400,000
Total assets acquired															33,048,000						20,413,000
Liabilities Assumed
Accounts payable and other current liabilities															3,342,000						6,807,000
Other non-current liabilities															1,134,000						3,513,000
Net assets acquired															28,572,000				1,200,000		10,093,000
Total purchase price															34,250,000						18,750,000
Goodwill	9,864,000				8,497,000				9,864,000	8,497,000					5,678,000						8,657,000
Impairment charge related to intangible assets																		1,100,000					1,300,000
Impairment charge related to goodwill									3,809,000
Income from discontinued operations before tax																			800,000
Income from discontinued operations, tax expense																			200,000
Gain from sale of discontinued operations																			4,900,000
Tax expense from sale of discontinued operations																			0
Supplemental Pro Forma Information
Sales																342,919,000	371,176,000
Net income from continuing operations																$ 7,909,000	$ 18,956,000
Diluted earnings per share from continuing operations (in dollars per share)																$ 0.66	$ 1.62