BUSINESS SEGMENT INFORMATION (Details) (USD $)	3 Months Ended										12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011		Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
BUSINESS SEGMENT INFORMATION [Abstract]
Number of industry in which entity operates											1	1	1
Number of reportable operating segments											3	3	3
Summary of key financial data [Abstract]
Net Sales to External Customers											$ 286,594,000	$ 295,121,000	$ 302,539,000
Net Sales	71,752,000	[1]	76,059,000	73,222,000	65,561,000	68,642,000	75,903,000	79,173,000	[2]	71,403,000	286,594,000	295,121,000	302,539,000
Income (loss) from operations											1,705,000	7,396,000	15,160,000
Total assets	275,218,000					276,911,000					275,218,000	276,911,000	277,172,000
Capital Expenditures											4,744,000	2,928,000	2,427,000
Depreciation and Amortization Expense											9,072,000	8,667,000	8,836,000
Restructuring charges	3,100,000										5,245,000	314,000	0
Litigation charges											(26,000)	(3,471,000)	(8,103,000)
Loss on disposal of assets											1,000,000
Pre-tax gain on sale of property											(183,000)	93,000	352,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales	71,752,000	[1]	76,059,000	73,222,000	65,561,000	68,642,000	75,903,000	79,173,000	[2]	71,403,000	286,594,000	295,121,000	302,539,000
Long-lived Assets by Geographic Location [Abstract]
Long-Lived Assets	47,498,000					51,368,000					47,498,000	51,368,000
Revenue, Major Customer [Line Items]
Number of customers representing sales in excess of ten percent											2	2	2
Two Customers [Member]
Revenue, Major Customer [Line Items]
Revenue from major customers											70,600,000	65,700,000	74,600,000
Revenue from major customers, percentage (in hundredths)											24.60%	22.30%	24.70%
Interconnect [Member]
Summary of key financial data [Abstract]
Net Sales											109,245,000	107,346,000	101,059,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											109,245,000	107,346,000	101,059,000
Magnetics [Member]
Summary of key financial data [Abstract]
Net Sales											100,529,000	87,104,000	127,664,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											100,529,000	87,104,000	127,664,000
Modules [Member]
Summary of key financial data [Abstract]
Net Sales											66,663,000	90,475,000	61,092,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											66,663,000	90,475,000	61,092,000
Circuit protection [Member]
Summary of key financial data [Abstract]
Net Sales											10,157,000	10,196,000	12,724,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											10,157,000	10,196,000	12,724,000
North America [Member]
Summary of key financial data [Abstract]
Net Sales to External Customers											126,469,000	134,804,000	111,888,000
Net Sales											138,966,000	149,114,000	125,383,000
Income (loss) from operations											1,336,000	9,026,000	4,181,000
Total assets	84,609,000					115,552,000					84,609,000	115,552,000	110,984,000
Capital Expenditures											2,455,000	1,121,000	870,000
Depreciation and Amortization Expense											4,081,000	4,046,000	3,862,000
Restructuring charges											4,500,000
Loss on disposal of assets											(300,000)
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											138,966,000	149,114,000	125,383,000
Asia [Member]
Summary of key financial data [Abstract]
Net Sales to External Customers											128,319,000	126,941,000	156,635,000
Net Sales											167,756,000	177,815,000	196,243,000
Income (loss) from operations											(42,000)	(3,480,000)	9,357,000
Total assets	148,351,000					148,950,000					148,351,000	148,950,000	155,414,000
Capital Expenditures											2,003,000	1,733,000	1,371,000
Depreciation and Amortization Expense											4,076,000	4,137,000	4,513,000
Restructuring charges											600,000
Litigation charges												3,500,000	8,100,000
Pre-tax gain on sale of property											200,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											167,756,000	177,815,000	196,243,000
Long-lived Assets by Geographic Location [Abstract]
Percentage of identifiable assets (in hundredths)	43.00%										43.00%
Europe [Member]
Summary of key financial data [Abstract]
Net Sales to External Customers											31,806,000	33,376,000	34,016,000
Net Sales											33,329,000	34,597,000	35,150,000
Income (loss) from operations											411,000	1,850,000	1,622,000
Total assets	42,258,000					12,409,000					42,258,000	12,409,000	10,774,000
Capital Expenditures											286,000	74,000	186,000
Depreciation and Amortization Expense											915,000	484,000	461,000
Restructuring charges											100,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											33,329,000	34,597,000	35,150,000
Intergeographic revenues [Member]
Summary of key financial data [Abstract]
Net Sales											(53,457,000)	(66,405,000)	(54,237,000)
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											(53,457,000)	(66,405,000)	(54,237,000)
United States [Member]
Summary of key financial data [Abstract]
Net Sales											126,469,000	134,804,000	111,888,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											126,469,000	134,804,000	111,888,000
Long-lived Assets by Geographic Location [Abstract]
Long-Lived Assets	27,552,000					30,204,000					27,552,000	30,204,000
Macao [Member]
Summary of key financial data [Abstract]
Net Sales											128,319,000	126,941,000	156,635,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											128,319,000	126,941,000	156,635,000
Germany [Member]
Summary of key financial data [Abstract]
Net Sales											14,165,000	17,937,000	20,027,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											14,165,000	17,937,000	20,027,000
United Kingdom [Member]
Summary of key financial data [Abstract]
Net Sales											13,203,000	11,927,000	10,747,000
Restructuring charges												300,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											13,203,000	11,927,000	10,747,000
Italy [Member]
Summary of key financial data [Abstract]
Net Sales											1,083,000	0	0
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											1,083,000	0	0
Sweden [Member]
Summary of key financial data [Abstract]
Net Sales											57,000	0	0
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											57,000	0	0
Czech Republic [Member]
Summary of key financial data [Abstract]
Net Sales											3,298,000	3,512,000	3,242,000
Net Sales To External Customers By Geographic Area And Major Product Line [Abstract]
Consolidated net sales											3,298,000	3,512,000	3,242,000
People's Republic of China (PRC) [Member]
Long-lived Assets by Geographic Location [Abstract]
Long-Lived Assets	16,622,000					18,611,000					16,622,000	18,611,000
All other foreign countries [Member]
Long-lived Assets by Geographic Location [Abstract]
Long-Lived Assets	$ 3,324,000					$ 2,553,000					$ 3,324,000	$ 2,553,000

[1] The net loss for the quarter ended December 31, 2012 includes $3.1 million of restructuring charges primarily related to severance charges and the writedown of assets associated with the closure of the Company's Vinita, Oklahoma manufacturing facility.

[2] The net loss for the quarter ended June 30, 2011 includes $2.8 million of net litigation charges related to the SynQor and Halo lawsuits ($2.6 million after tax).