FINANCING ARRANGEMENTS (DETAILS 2)	12 Months Ended						12 Months Ended						12 Months Ended				12 Months Ended			12 Months Ended								12 Months Ended						12 Months Ended		12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Taiwan Unsecured Credit Facility [Member] USD ($)	Dec. 31, 2013 Taiwan Unsecured Credit Facility [Member] USD ($)	Jul. 31, 2013 Taiwan Unsecured Credit Facility [Member] USD ($)	Dec. 31, 2014 Jiaxing Line of Credit [Member] USD ($)	Dec. 31, 2013 Jiaxing Line of Credit [Member] USD ($)	Jan. 07, 2014 Jiaxing Line of Credit [Member] USD ($)	Jan. 07, 2014 Jiaxing Line of Credit [Member] CNY	Dec. 31, 2012 Jiaxing Line of Credit [Member] USD ($)	Dec. 31, 2012 Jiaxing Line of Credit [Member] CNY	Dec. 31, 2014 HSL Credit Facility [Member] USD ($)	Dec. 31, 2014 HSL Credit Facility [Member] CNY	Sep. 30, 2014 HSL Credit Facility [Member] USD ($)	Sep. 30, 2014 HSL Credit Facility [Member] CNY	Dec. 31, 2014 Kellenberger HH-GmbH revolving credit facility [Member] USD ($)	Jul. 31, 2013 Kellenberger HH-GmbH revolving credit facility [Member] USD ($) Rate	Jul. 31, 2013 Kellenberger HH-GmbH revolving credit facility [Member] CHF	Dec. 31, 2014 Kellenberger credit facility [Member] USD ($)	Aug. 31, 2010 Kellenberger credit facility [Member] USD ($)	Aug. 31, 2010 Kellenberger credit facility [Member] CHF	Oct. 31, 2009 Kellenberger credit facility [Member] USD ($) Rate	Oct. 31, 2009 Kellenberger credit facility [Member] CHF	Dec. 31, 2014 HCL Credit Facility [Member] USD ($)	Dec. 31, 2014 HCL Credit Facility [Member] CNY	Jan. 31, 2014 HCL Credit Facility [Member] USD ($)	Dec. 31, 2014 Domestic Line of Credit [Member] USD ($) Rate	Dec. 31, 2013 Domestic Line of Credit [Member] USD ($) Rate	Dec. 31, 2012 Domestic Line of Credit [Member] Rate	Dec. 31, 2011 Domestic Line of Credit [Member] USD ($) Rate	Dec. 31, 2010 Domestic Line of Credit [Member] Rate	Dec. 31, 2009 Domestic Line of Credit [Member] USD ($) Rate	Dec. 31, 2014 Unsecured domestic credit facility [Member] USD ($) Rate	Dec. 31, 2013 Unsecured domestic credit facility [Member] USD ($)	Dec. 31, 2014 Jiaxing construction loan [Member] Rate	Dec. 31, 2013 Jiaxing construction loan [Member] USD ($)	Dec. 31, 2013 Jiaxing construction loan [Member] CNY	Dec. 31, 2012 Jiaxing Line of Credit [Member] USD ($)	Dec. 31, 2012 Jiaxing Line of Credit [Member] CNY
Line of Credit Facility [Line Items]
Borrowing capacity available for working capital and letter of credit purposes	$ 82,100,000					$ 12,000,000			$ 9,500,000	59,000,000.0	$ 5,500,000	34,200,000.0			$ 5,500,000	34,000,000		$ 18,100,000	18,000,000		$ 9,100,000	9,000,000	$ 7,000,000	7,000,000			$ 2,000,000				$ 25,000,000		$ 10,000,000	$ 3,000,000
Borrowing capacity available for working capital need	57,300,000								6,300,000	39,000,000.0								8,000,000	8,000,000		5,000,000	5,000,000	3,000,000	3,000,000															3,200,000	20,000,000
Interest rate (as a percent)				1.4376%	1.54%		6.16%	6.60%									2.25%			2.50%
Debt Instrument, Basis Spread on Variable Rate							10.00%																					2.44%	2.44%	2.75%	3.50%	5.00%				20.00%
Line of credit facility, amount outstanding				0	0		0	0
Variable interest rate debt	16,225,000	26,635,000															0			0																	1,500,000	9,000,000
Collateral cash deposit requirement, percent													30.00%	30.00%
Letters of Credit Outstanding, Amount	8,700,000	9,900,000											100,000	700,000			5,100,000			100,000					1,100,000	6,900,000		0	0					0	0
Debt Instrument, Collateral Amount																		9,300,000	9,200,000		4,000,000	4,000,000	3,000,000	3,000,000			1,000,000
Debt instrument covenant equity as a percentage of total assets																		35.00%	35.00%				35.00%	35.00%
Line of credit facility percentage of investments pledged																																	65.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum																																		5.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum																																		16.00%
Letters of credit outstanding amount pertaining to self insured workers compensation exposure	800,000	900,000
Deferred Finance Costs, Net		700,000
Interest Paid	$ 800,000	$ 1,000,000	$ 900,000