Magnetek 10-K 20 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 28, 2014	Feb. 20, 2015	Jun. 27, 2014
Entity Information [Line Items]
Entity Registrant Name	MAGNETEK, INC.
Entity Central Index Key	751085
Current Fiscal Year End Date	-16
Entity Filer Category	Smaller Reporting Company
Document Type	10-K
Document Period End Date	28-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		3,534,875
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$72,768,803

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Income Statement [Abstract]
Net sales	$109,713	$103,316	$114,274
Cost of sales	69,762	67,991	74,430
Gross profit	39,951	35,325	39,844
Operating expenses:
Research and development	3,174	3,246	3,834
Pension expense	40,349	6,365	6,936
Sales, general and administrative	22,158	20,939	21,052
Income (loss) from operations	-25,730	4,775	8,022
Provision for income taxes	715	1,016	1,096
Income (loss) from continuing operations	-26,445	3,759	6,926
Income (loss) from discontinued operations, net of tax	-818	-627	5,697
Net income (loss)	($27,263)	$3,132	$12,623
Earnings (loss) per common share - basic
Income (loss) from continuing operations (USD per share)	($7.89)	$1.16	$2.18
Income (loss) from discontinued operations (USD per share)	($0.24)	($0.19)	$1.79
Net income (loss) (USD per share)	($8.13)	$0.97	$3.97
Earnings (loss) per common share - diluted
Income (loss) from continuing operations (USD per share)	($7.89)	$1.13	$2.14
Income (loss) from discontinued operations (USD per share)	($0.24)	($0.19)	$1.76
Net income (loss) (USD per share)	($8.13)	$0.94	$3.90
Weighted average shares outstanding:
Weighted average shares outstanding - basic	3,350	3,231	3,174
Weighted average shares outstanding - diluted	3,350	3,339	3,238

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	($33,823)	$3,209	$2,297	$1,054	$373	$1,122	$1,165	$472	($27,263)	$3,132	$12,623
Change in unrecognized pension liability									35,022	35,389	-8,867
Change in currency translation adjustments									-421	-284	132
Comprehensive income									$7,338	$38,237	$3,888

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 28, 2014	Dec. 29, 2013
In Thousands, unless otherwise specified
Current assets:
Cash	$9,702	$14,960
Restricted cash	262	262
Trade accounts receivable, less allowances for doubtful accounts	16,975	15,100
Inventories	13,626	13,322
Prepaid expenses and other current assets	801	814
Total current assets	41,366	44,458
Buildings and improvements	1,962	1,963
Machinery and equipment	21,109	21,301
Less accumulated depreciation	20,140	20,529
Net property, plant and equipment	2,931	2,735
Goodwill	30,364	30,427
Other assets	4,039	4,349
Total assets	78,700	81,969
Current liabilities:
Accounts payable	10,375	10,403
Accrued liabilities	6,703	4,833
Total current liabilities	17,078	15,236
Long-term pension benefit obligations	27,360	48,461
Other long-term obligations	845	911
Deferred income taxes	9,798	9,125
Commitments and contingencies
Stockholders' Equity:
Common stock, $0.01 par value, 15,000 shares authorized; 3,535 and 3,260 outstanding at December 28, 2014 and December 29, 2013, respectively	35	33
Additional paid-in capital	150,641	142,598
Retained earnings (accumulated deficit)	-10,175	17,088
Accumulated other comprehensive loss	-116,882	-151,483
Total stockholders' equity	23,619	8,236
Total liabilities and stockholders' equity	$78,700	$81,969

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 28, 2014	Dec. 29, 2013
Statement of Financial Position [Abstract]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares outstanding	3,535,000	3,260,000

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Loss [Member]
In Thousands, unless otherwise specified
Beginning balance, amount at Jan. 01, 2012	($35,745)	$32	$140,743	$1,333	($177,853)
Beginning balance, shares at Jan. 01, 2012		3,158
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercised, shares	0
Stock-based compensation expense	824	0	824
Shares issued, shares		42
Shares issued, amount	0
Shares purchased, shares		-14
Shares purchased, amount	-151	0	-151
Shares issued to trust, shares		23
Shares issued to trust, amount	309	0	309
Net income (loss)	12,623			12,623
Translation adjustments	132				132
Pension adjustments	-8,867				-8,867
Comprehensive income (loss)	3,888
Ending balance, amount at Dec. 30, 2012	-30,875	32	141,725	13,956	-186,588
Ending balance, shares at Dec. 30, 2012		3,209
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercised, shares	8	8
Exercise of stock options, amount	99		99
Stock-based compensation expense	676	0	676
Shares issued, shares		37
Shares issued, amount	1	1
Shares purchased, shares		-13
Shares purchased, amount	-218	0	-218
Shares issued to trust, shares		19
Shares issued to trust, amount	316	0	316
Net income (loss)	3,132			3,132
Translation adjustments	-284				-284
Pension adjustments	35,389				35,389
Comprehensive income (loss)	38,237
Ending balance, amount at Dec. 29, 2013	8,236	33	142,598	17,088	-151,483
Ending balance, shares at Dec. 29, 2013	3,260	3,260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercised, shares	0
Stock-based compensation expense	599	0	599
Shares issued, shares		22
Shares issued, amount	0	0
Shares purchased, shares		-8
Shares purchased, amount	-211	0	-211
Shares issued to trust, shares		11
Shares issued to trust, amount	285	0	285
Shares issued to pension plan, shares		250
Shares issued to pension plan, amount	7,372	2	7,370
Net income (loss)	-27,263			-27,263
Translation adjustments	-421				-421
Pension adjustments	35,022				35,022
Comprehensive income (loss)	7,338
Ending balance, amount at Dec. 28, 2014	$23,619	$35	$150,641	($10,175)	($116,882)
Ending balance, shares at Dec. 28, 2014	3,535	3,535

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Cash flows from operating activities:
Net income (loss)	($27,263)	$3,132	$12,623
Loss (income) from discontinued operations	818	627	-5,697
Adjustments to reconcile net income (loss) to net cash provided by (used) operating activities:
Depreciation	760	663	2,082
Amortization	53	53	53
Stock-based compensation expense	599	676	824
Pension expense	40,349	6,365	6,936
Deferred income tax provision	673	929	950
Changes in operating assets and liabilities	13	448	-1,465
Cash contribution to pension fund	-19,056	-24,856	-11,571
Net cash provided by (used in) operating activities: Continuing operations	-3,054	-11,963	4,735
Net cash provided by (used in) operating activities: Discontinued operations	-907	-1,145	4,079
Net cash provided by (used in) operating activities	-3,961	-13,108	8,814
Cash flows from investing activities:
Capital expenditures	-962	-549	-869
Net cash provided by (used in) investing activities: Continuing operations	-962	-549	-869
Net cash provided by (used in) investing activities - discontinued operations	0	0	0
Net cash provided by (used in) investing activities	-962	-549	-869
Cash flow from financing activities:
Proceeds from issuance of common stock	285	416	309
Purchase and retirement of treasury stock	-211	-218	-151
Principal payments under capital lease obligations	0	-3	-3
Net cash provided by (used in) financing activities - continuing operations	74	195	155
Net cash provided by (used in) financing activities - discontinued operations	0	0	0
Net cash provided by (used in) financing activities	74	195	155
Effect of exchange rate changes on cash	-409	-284	12
Net increase (decrease) in cash	-5,258	-13,746	8,112
Cash at the beginning of the period	14,960	28,706	20,594
Cash at the end of the period	$9,702	$14,960	$28,706

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 28, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Profile
	Magnetek, Inc. (the “Company” or “Magnetek”) is a global provider of digital power control systems that are used to control motion and power primarily in material handling, elevator, and mining applications.  The Company’s products consist primarily of programmable motion control and power conditioning systems used on overhead cranes and hoists, elevators, and underground mining equipment.
	Basis of Presentation
	The consolidated financial statements include the accounts of Magnetek, Inc. and its subsidiaries. All significant intercompany accounts and transactions have been eliminated.
	Fiscal Year
	On August 4, 2011, the Company's Board of Directors approved a change in the Company's fiscal year-end from the Sunday nearest to June 30 of each calendar year to the Sunday nearest to December 31, with the change to a calendar year reporting cycle beginning January 2, 2012. The intent of the change was to align the reporting of financial results more closely with peers and to better align the Company's business cycle with suppliers and customers. Fiscal years 2014, 2013, and 2012 refer to the twelve-month periods ended December 28, 2014, December 29, 2013, and December 30, 2012, respectively, and each fiscal year contained 52 weeks.
	Use of Estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
	Accounts Receivable
	Accounts receivable represent amounts due from customers in the ordinary course of business.  The Company is subject to losses from uncollectable receivables in excess of its allowances.  The Company maintains allowances for doubtful accounts for estimated losses from customers’ inability to make required payments.  In order to estimate the appropriate level of these allowances, the Company analyzes historical bad debts, customer concentrations, current customer creditworthiness, current economic trends, and changes in customer payment patterns.  If the financial conditions of the Company’s customers were to deteriorate and impair their ability to make payments, additional allowances may be required in future periods.
	Inventories
	The Company’s inventories are stated at the lower of cost or market.  Cost is determined by the first-in, first-out (“FIFO”) method, including material, labor and factory overhead.  Existing inventory on hand may exceed future demand either because the product is obsolete, or the amount on hand is more than can be used to meet future needs.  The Company identifies potentially obsolete and excess inventory by evaluating overall inventory levels in relation to past and anticipated usage levels.  In assessing the ultimate realization of inventories, the Company is required to make judgments as to future demand requirements and compare those with the current or committed inventory levels.  If future demand requirements are less favorable than those projected by management, additional inventory write-downs may be required.
	Reserves for Litigation and Environmental Issues
	The Company periodically records the estimated impacts of various conditions, situations, or circumstances involving uncertain outcomes.  The accounting for such events is prescribed under ASC Topic 450, Contingencies.  The Company does not record gain contingencies under any circumstances.  For loss contingencies, the loss must be accrued if information is available that indicates it is probable that the loss has been incurred, given the likelihood of uncertain events, and if the amount of the loss can be reasonably estimated.
	The accrual of a contingency involves considerable judgment on the part of management.  The Company uses its internal expertise and outside experts, as necessary, to help estimate the probability that a loss has been incurred and the amount or range of the loss.
	Income Taxes
	The Company uses the liability method to account for income taxes.  The preparation of consolidated financial statements involves estimating the Company’s current tax exposure together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes.  These differences result in deferred tax assets and liabilities, which are included in the consolidated balance sheets.  An assessment of the recoverability of deferred tax assets is made, and a valuation allowance is established if necessary based upon this assessment.
	Pension Benefits
	The valuation of the Company’s pension plan requires the use of assumptions and estimates to develop actuarial valuations of pension expense, pension assets, and pension liabilities.  These assumptions include discount rates, investment returns, and mortality rates.  Changes in these assumptions could potentially have a material impact on the Company’s pension expense and related funding requirements.
	Restricted Cash
	At December 28, 2014, and December 29, 2013, the Company had $0.3 million of restricted cash related to minimum balance requirements associated with procurement of certain raw materials and supplies.
	Revenue Recognition
	The Company’s policy is to recognize revenue when the earnings process is complete.  The criteria used in making this determination are persuasive evidence that an arrangement exists, delivery has occurred, the sales price is fixed or determinable, and collectability is reasonably assured.  Sales are recorded net of returns and allowances, which are estimated using historical data, at the time of sale.
	Terms of shipment are free on board shipping point, and payment is not contingent upon resale or any other matter other than passage of time.  As a result, title to goods passes upon shipment.  Amounts billed to customers for shipping costs are reflected in net sales; shipping costs are reflected in cost of sales.
	Property, Plant and Equipment
	Additions and improvements are capitalized at cost, whereas expenditures for maintenance and repairs are charged to expense as incurred. Depreciation is provided over the estimated useful lives of the respective assets principally on the straight-line method (machinery and equipment normally five to ten years; buildings and leasehold improvements over the shorter of the lease term or the economic life, estimated at ten to forty years).
	Goodwill
	In accordance with ASC Topic 350, Goodwill and Other Intangible Assets, the Company reviews the carrying value of goodwill at least annually and more frequently if indicators of potential impairment arise. Goodwill represents the excess of the amount paid to acquire the Company over the estimated fair value of the net tangible and intangible assets acquired as of the acquisition date. Conditions that would trigger an impairment assessment include, but are not limited to, a significant adverse change in legal factors or business climate that could affect the value of an asset.
	The Company performed the required annual impairment tests for fiscal years 2014, 2013, and 2012, and found no impairment of goodwill. There can be no assurance that future goodwill impairment tests will not result in a charge to earnings.
	Intangible Assets
	Additions to intangible assets are capitalized at fair market value and the carrying value of indefinite-lived intangibles is reviewed for impairment if indicators of impairment arise. Intangible assets, which consist principally of patents, are included in other assets in the consolidated balance sheets, and are amortized over the estimated useful lives of the respective assets, principally on the straight-line method.  In fiscal 2009 and fiscal 2010, the Company acquired several patents related to the design and manufacture of digital DC drives for material handling and mining applications.  The cost of the patents, $533 as of December 28, 2014, and December 29, 2013, was capitalized and is included in other assets in the consolidated balance sheets.  The estimated useful life of the patents is 10 years. Accumulated amortization of the patents as of December 28, 2014, and December 29, 2013, was $344 and $291, respectively, resulting in a net carrying value as of those dates of $189 and $242, respectively. The Company does not believe any indicators of impairment of the intangible assets occurred in fiscal years 2014, 2013, or 2012. There can be no assurance that future intangible asset impairment tests will not result in a charge to earnings.
	Stock-Based Compensation
	The Company records stock-based compensation expenses in accordance with ASC Topic 718, Stock Compensation. Compensation expense related to all stock-based awards for fiscal years 2014, 2013, and 2012 is included in sales, general and administrative expense in the consolidated statements of operations.  No tax benefit was recorded on the stock compensation expense for fiscal years 2014, 2013, and 2012 due to deferred tax valuation allowances recorded by the Company in those years.
	Research and Development
	Expenditures for research and development are charged to expense as incurred and totaled $3,174 for fiscal 2014, $3,246 for fiscal 2013, and $3,834 for fiscal 2012.
	Advertising
	Expenditures for advertising are charged to expense as incurred and totaled $22 for fiscal year 2014, $58 for fiscal year 2013, and $88 for fiscal year 2012.
	Foreign Currency Translation
	The accounts of the Company’s foreign entities are measured using local currency as the functional currency.  Assets and liabilities are translated to the reporting currency (U.S. Dollar) at the exchange rate in effect at year-end.  Revenues and expenses are translated at the rates of exchange prevailing during the year.  Unrealized translation gains and losses arising from differences in exchange rates from period to period are included as a component of accumulated other comprehensive gain or loss in stockholders’ equity.
	Earnings Per Share
	In accordance with ASC Topic 260, Earnings Per Share, basic earnings per share is computed using the weighted average number of common shares outstanding during the period. Diluted earnings per common share incorporate the incremental shares issuable upon the assumed vesting of restricted stock and the exercise of stock options as if all vesting and exercises had occurred at the beginning of the fiscal year, whereas diluted loss per common share does not incorporate these incremental shares.
	Recent Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board issued Accounting Standards Codification ("ASC") 606-10, Revenue for Contracts with Customers (issued under Accounting Standards Update No. 2014-09). ASC 606-10 will be effective for the year beginning on or around January 1, 2017, and will replace all existing revenue recognition guidance. The Company is in the process of determining whether the adoption of ASC 606-10 will have an impact on the Company's results of operations, financial position, or cash flows.

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 29, 2013
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations
	Certain expenses incurred related to businesses the Company no longer owns, are classified as discontinued operations.  The results of discontinued operations follow:
		Fiscal Year Ended
		December 28,			December 29,			December 30,
		2014			2013			2012
	Income (loss) from discontinued operations before interest and income taxes	$	(818	)	$	(627	)	$	703
	Income on sale of telecom power systems business	—			—			32
	Gain from settlement agreement, net of fees	—			—			4,962
	Income (loss) from discontinued operations	$	(818	)	$	(627	)	$	5,697
	The Company's loss from discontinued operations of $0.8 million in fiscal 2014 was comprised mainly of charges of $0.4 million for environmental matters and $0.2 million for legal fees related to asbestos matters from previously divested businesses (see Note 10 of Notes to Consolidated Financial Statements).
	The Company's loss from discontinued operations of $0.6 million in fiscal 2013 was comprised mainly of charges of $0.3 million for environmental matters and $0.2 million for legal fees related to asbestos matters from previously divested businesses.
	Income from discontinued operations of $5.7 million in fiscal 2012 includes a gain of $5.0 million from a settlement agreement entered into by the Company to resolve a legal matter, as well as income of $1.2 million from non-cash adjustments of liabilities related to previously owned businesses, partially offset by $0.5 million of legal fees and other costs related to previously divested businesses (see Note 10 of Notes to Consolidated Financial Statements).

Goodwill

Goodwill	12 Months Ended
	Dec. 28, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill
	The change in the carrying value of goodwill for the periods ended December 28, 2014, and December 29, 2013, is as follows:
		December 28,		December 29,
		2014		2013
	Balance at beginning of period	$30,427		$30,485
	Currency translation	(63	)	(58	)
	Balance at end of period	$30,364		$30,427

Inventories

Inventories	12 Months Ended
	Dec. 28, 2014
Inventory Disclosure [Abstract]
Inventories	Inventories
	Inventories consist of the following:
		December 28,		December 29,
		2014		2013
	Raw materials	$	8,710	$	8,531
	Work in process	1,252		1,344
	Finished goods	3,664		3,447
	Total inventory	$	13,626	$	13,322

Bank_Borrowing_Arrangements

Bank Borrowing Arrangements	12 Months Ended
	Dec. 28, 2014
Debt Disclosure [Abstract]
Bank Borrowing Arrangements	Bank Borrowing Arrangements
	In November 2007, the Company entered into an agreement with Associated Bank, N.A. (“Associated Bank”) providing for a $10 million revolving credit facility (the “revolving facility”).  Borrowings under the revolving facility bear interest at the London Interbank Offering Rate (“LIBOR”) plus 1.5%, with borrowing levels determined by a borrowing base formula as defined in the agreement, which includes the level of eligible accounts receivable.  The revolving facility also supports the issuance of letters of credit, places certain restrictions on the Company’s ability to pay dividends or make acquisitions, and includes covenants that require minimum operating profit levels and limit annual capital expenditures.  Borrowings under the revolving facility were originally collateralized by the Company’s accounts receivable and inventory.
	The Company has subsequently entered into several amendments to the revolving facility, mainly to increase the commitment amount to $12.5 million, to extend the maturity date of the revolving facility, to broaden the security interest of Associated Bank to collateralize all assets of the Company, and to establish or modify certain covenants with which the Company must comply under the terms of the amended revolving facility.
	On June 15, 2014, the Company and Associated Bank entered into the seventh amendment to the revolving facility, the purpose of which was to (i) extend the maturity date of the revolving facility to June 15, 2015; (ii) retain the commitment amount of Associated Bank at $12.5 million; (iii) establish minimum quarterly adjusted earnings before interest, taxes, depreciation and amortization requirements for the term of the agreement; and (iv) establish maximum quarterly cash amounts that can be contributed to the Company's defined benefit pension plan for the term of the agreement.
	On August 20, 2014, the Company and Associated Bank entered into the eighth amendment to the revolving facility, the purpose of which was to increase the maximum quarterly cash amounts that can be contributed to the Company's defined benefit pension plan for the term of the agreement.
	There were no amounts outstanding on the amended revolving facility as of December 28, 2014.  The Company is currently in compliance with all covenants of the revolving facility, as amended.

Earnings_Loss_Per_Share

Earnings (Loss) Per Share	12 Months Ended
	Dec. 28, 2014
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Earnings (Loss) Per Share
	The following table sets forth the computation of basic and diluted earnings (loss) per share for the periods ended:
		Fiscal Year Ended
		December 28,			December 29,			December 30,
		2014			2013			2012
	Numerator:
	Income (loss) from continuing operations	$	(26,445	)	$	3,759		$	6,926
	Income (loss) from discontinued operations	(818		)	(627		)	5,697
	Net income (loss)	$	(27,263	)	$	3,132		$	12,623
	Denominator:
	Weighted average shares for basic income (loss) per share	3,350			3,231			3,174
	Add dilutive effect of stock options outstanding	—			108			64
	Weighted average shares for diluted income per share	3,350			3,339			3,238
	Income (loss) per share - basic:
	Income (loss) per share from continuing operations	$	(7.89	)	$	1.16		$	2.18
	Income (loss) per share from discontinued operations	$	(0.24	)	$	(0.19	)	$	1.79
	Net income (loss) per share - basic	$	(8.13	)	$	0.97		$	3.97
	Income (loss) per share - diluted:
	Income (loss) per share from continuing operations	$	(7.89	)	$	1.13		$	2.14
	Income (loss) per share from discontinued operations	$	(0.24	)	$	(0.19	)	$	1.76
	Net income (loss) per share - diluted	$	(8.13	)	$	0.94		$	3.9
	The Company's computation of weighted average shares for diluted earnings per share for fiscal year 2014 excludes 116 thousand shares of unvested restricted stock and options outstanding to purchase 104 thousand shares of common stock because their inclusion would have had an anti-dilutive effect. Outstanding options to purchase 147 thousand and 174 thousand shares of common stock for fiscal years 2013 and 2012, respectively, have not been included in the Company’s computation of weighted average shares for diluted earnings per share because the effect would have been anti-dilutive.

Fair_Values_of_Financial_Instr

Fair Values of Financial Instruments	12 Months Ended
	Dec. 28, 2014
Fair Value Disclosures [Abstract]
Fair Values of Financial Instruments	Fair Values of Financial Instruments
	The carrying amounts of certain financial instruments including cash, restricted cash, accounts receivable, and accounts payable approximate their fair values based on the short-term nature of these instruments.  In addition, the Company’s investment in an annuity contract of $3.6 million at December 28, 2014, and $3.9 million at December 29, 2013, is recorded at fair value based upon the net asset value of the contract.  The annuity contract is included in other assets in the accompanying consolidated balance sheet and is classified as a level 2 asset within the fair value hierarchy (refer to Note 12 of Notes to Consolidated Financial Statements for a definition of the fair value levels).

Asset_Impairment_Charges

Asset Impairment Charges	12 Months Ended
	Dec. 28, 2014
Property, Plant and Equipment Impairment or Disposal [Abstract]
Asset Impairment Charges	Asset Impairment Charges
	During fiscal 2012, the Company committed to a plan to no longer pursue new business opportunities in renewable energy due to diminished expectations for future sales of inverters into renewable energy markets. As a result, the Company determined at that time that its fixed assets used in the manufacture and test of inverters were impaired. Accordingly, the Company recorded a non-cash, pre-tax impairment charge of $1.2 million. The charge is included in cost of sales in the accompanying consolidated statement of operations for the fiscal year ended December 30, 2012. The impairment charge reduced the net book value of the Company's renewable energy fixed assets to a negligible amount.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 28, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The Company’s provision for income taxes, all of which relates to its continuing operations, consists of the following:
		Fiscal Year Ended
	For the period ended	December 28,			December 29,				December 30,
		2014			2013				2012
	Current
	Federal	$	—		$	—			$	—
	State	—			—				45
	Foreign	22			87				101
	Deferred
	Federal	673			926				955
	State and foreign	20			3				(5		)
	Provision for income taxes	$	715		$	1,016			$	1,096
	The Company did not record any provision for income taxes related to its discontinued operations for fiscal years 2014, 2013, or 2012, as the Company has a full valuation allowance and available net operating losses.
	A reconciliation of the Company's effective tax rate for continuing operations to the statutory Federal tax rate follows:
		Fiscal Year Ended
		December 28,						December 29,						December 30,
		2014						2013						2012
		Amount			%			Amount				%		Amount			%
	Provision (benefit) computed at the statutory rate	$	(9,005	)	35			$	1,670			35		$	2,808		35
	Valuation allowance	9,082			(35.2	)		(1,576		)		(33.0	)	(2,607		)	(32.1	)
	Intangible amortization	673			(2.6	)		954				20		955			11.9
	Foreign tax rate differential	(35		)	0.1			(32		)		(0.7	)	(60		)	(0.8	)
	Total provision for income taxes	$	715		(2.7	)		$	1,016			21.3		$	1,096		14
	Income before provision for income taxes of the Company's foreign subsidiaries (located in Canada and the United Kingdom) included in continuing operations was approximately $221, $368, and $447 for fiscal years 2014, 2013, and 2012, respectively.
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes.     Significant components of the Company's deferred tax liabilities and assets as of December 28, 2014, and December 29, 2013, follow:
		December 28,			December 29,
		2014			2013
	Deferred tax liabilities
	Depreciation and amortization (including differences in the basis of acquired assets)	$	(9,798	)	$	(9,125	)
	Total deferred tax liabilities	(9,798		)	(9,125		)
	Deferred tax assets
	Inventory and other reserves	2,428			2,329
	Pension benefit obligation	63,466			85,533
	Net operating loss and capital loss carryforwards	93,953			88,784
	Total gross deferred tax assets	159,847			176,646
	Less valuation allowance	(159,795		)	(176,568		)
	Deferred tax assets less valuation allowance	52			78
	Net deferred tax liability	$	(9,746	)	$	(9,047	)
	The Company records valuation allowances against its deferred tax assets, when necessary, in accordance with ASC Topic 740, Income Taxes.  Realization of deferred tax assets (such as net operating loss carryforwards) is dependent on future taxable earnings and may therefore be uncertain.  To the extent the Company believes that recovery is unlikely, a valuation allowance is established against its deferred tax asset, which increases the Company’s income tax expense in the period such determination is made.  Due to the uncertainty surrounding the timing of realizing the benefits of its deferred tax assets in future tax returns, the Company has recorded a valuation allowance against its otherwise recognizable deferred tax assets.
	The Company had net operating loss (“NOL”) carryforwards for U.S. federal tax purposes of $242 million and $227 million as of December 28, 2014, and December 29, 2013, respectively. The potential tax benefit of all carryforwards has been fully reserved with a valuation allowance and therefore there is no net tax asset on the consolidated balance sheets related to this asset at December 28, 2014, or at December 29, 2013.  The Company’s NOLs have a carryforward period of 20 years with expiration dates ranging from 2019 to 2034.  As the balance sheet reflects no benefit of such NOLs, the Company anticipates that no federal tax liability, other than alternative minimum tax, would be recorded when U.S. taxable income is generated and such carryforwards are utilized.
	The Company regularly completes internal evaluations as to whether ordinary transfers of the Company’s common stock between shareholders have resulted in an ownership change as defined in Section 382 of the Internal Revenue Code.  Based on available information, the Company has determined that no such ownership change has occurred as of December 28, 2014.  If such ownership change had occurred, utilization of the Company’s NOLs would be subject to annual limitation provisions per the Internal Revenue Code and similar state laws.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 28, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Leases
	The Company leases certain facilities and machinery and equipment primarily under operating lease arrangements, which generally provide renewal options. Future minimum rental payments under noncancellable operating leases as of December 28, 2014, follow:
		Minimum
		Lease
	Fiscal Year	Payments
	2015	1,254
	2016	1,044
	2017	862
	2018	850
	2019	855
	Thereafter	1,116
	Total lease payments	5,981
	Rent expense was $1.4 million, $1.3 million, and $1.1 million for fiscal years 2014, 2013, and 2012, respectively.
	Litigation-Product Liability
	The Company has been named, along with multiple other defendants, in asbestos-related lawsuits associated with business operations previously acquired by the Company, but which are no longer owned. During the Company's ownership, none of the businesses produced or sold asbestos-containing products.  For such claims, the Company is either contractually indemnified against liability, or contractually obligated to defend and indemnify the purchaser of these former Magnetek business operations.   With respect to these claims, the Company is uninsured, but management believes that it has no such liability and the Company aggressively seeks dismissal from these proceedings. Management does not believe the asbestos proceedings, individually or in the aggregate, will have a material adverse effect on its financial position or results of operations. Given the nature of the above issues, uncertainty of the ultimate outcome, and inability to estimate the potential loss, no amounts have been reserved for these matters.
	Litigation-Patent Infringement and Related Proceedings
	In August 2008, the Company filed a complaint in the Circuit Court of Cook County, Illinois, County Department, Law Division, against Kirkland & Ellis, LLP (“K&E”). The lawsuit involved a claim for breach of professional responsibility arising out of K&E’s representation of Magnetek in the patent infringement action, Ole K. Nilssen v. Magnetek, Inc. The Company alleged that, as a result of K&E’s negligent breach of professional duty in failing to discover or investigate the existence of prior art and prior misconduct which would have made Nilssen’s patent claim unenforceable or invalidated his patent, the Company suffered an arbitration award and judgment in the amount of $23.4 million, which judgment was ultimately settled by the payment to Nilssen of $18.75 million. The Company sought damages in the amount of $18.75 million. Following a December 2011 mediation, the Company entered into a settlement agreement with K&E. Under the terms of the settlement agreement all outstanding claims were settled and released with prejudice in consideration of K&E making a $5 million settlement payment to Magnetek, which the Company received in January 2012. The federal proceeding and the Illinois Supreme Court proceeding were subsequently dismissed, also in January 2012. The Company entered into the settlement agreement to eliminate the uncertainties, burden and expense of further litigation. The Company recorded the settlement payment as a gain in discontinued operations in fiscal 2012, as the initial patent infringement claim related to a business the Company divested in 2003.
	Litigation-Other
	In November 2007, a lawsuit was filed by Antonio Canova in Italy, in the Court of Arezzo, Labor Law Section, against the Company and Power-One Italy, S.p.A. Mr. Canova is a former Executive Vice President of the Company and was Deputy Chairman and Managing Director of the Company's former Italian subsidiary, Magnetek, S.p.A. Mr. Canova asserted claims for damages in the amount of Euro 3.5 million (approximately US$4.3 million) allegedly incurred in connection with the termination of his employment at the time of the sale of the Company's power electronics business to Power-One, Inc. ("Power One") in October 2006. The claims against the Company relate to a change of control agreement and restricted stock grant. On March 8, 2012, the Court of Arezzo ruled in the Company's favor, dismissing Mr. Canova's claims against the Company as invalid. Mr. Canova appealed the ruling in September 2012. On October 16, 2013, the Labor Court of Appeals published its decision rejecting all claims of Mr. Canova against the Company and ordered Mr. Canova to pay a nominal amount to the Company toward its appellate legal expenses. Mr. Canoa did not appeal the ruling to the Supreme Court on or before October 16, 2014, and thereby relinquished any right to appeal. Accordingly the Company considers this matter closed.
	In October 2010, the Company received a request for indemnification from Power-One for an Italian tax matter arising out of the sale of the Company's power electronics business to Power-One in October 2006. With a reservation of rights, the Company affirmed its obligation to indemnify Power-One for certain pre-closing taxes.  The sale included an Italian company, Magnetek, S.p.A., and its wholly owned subsidiary, Magnetek Electronics (Shenzhen) Co. Ltd. (the “Power-One China Subsidiary”). The tax authority in Arezzo, Italy, issued a notice of audit report in September 2010 wherein it asserted that the Power-One China Subsidiary had its administrative headquarters in Italy with fiscal residence in Italy and, therefore, was subject to taxation in Italy.  In November 2010, the tax authority issued a notice of tax assessment for the period of July 2003 to June 2004, alleging that taxes of approximately Euro 1.9 million (approximately US$2.3 million) were due in Italy on taxable income earned by the Power-One China Subsidiary during this period.  In addition, the assessment alleged potential penalties calculated at 120% of the tax amount claimed together with interest in the amount of approximately Euro 2.6 million (or approximately US$3.2 million) for the alleged failure of the Power-One China Subsidiary to file its Italian tax return. A hearing before the Tax Court of Arezzo ("Tax Court") was held in July 2012 on the tax assessment for the period of July 2003 to June 2004. In September 2012, the Tax Court ruled in favor of the Power-One China Subsidiary dismissing the tax assessment for the period of July 2003 to June 2004. In February 2013, the tax authority filed an appeal of the Tax Court's September 2012 ruling. The Regional Tax Commission of Florence heard the appeal of the tax assessment dismissal for the period of July 2003 to June 2004 and on October 6, 2014 issued its ruling finding in favor of the tax authority. The Company believes the commission’s decision was based upon erroneous interpretation of the applicable law and intends to appeal the ruling to the Italian Supreme Court.
	In August 2012, the tax authority in Arezzo, Italy issued additional notices of tax assessment for the periods July 2002 to June 2003 and July 2004 to December 2006, alleging that taxes of approximately Euro 9.5 million (approximately US$11.6 million) were due in Italy on taxable income earned by the Power-One China Subsidiary together with an allegation of potential penalties in the amount of approximately Euro 2.8 million (approximately US$3.4 million) for the alleged failure of the Power-One China Subsidiary to file its Italian tax returns for the reporting periods. The tax authority asserted that the Power-One China Subsidiary had its administrative headquarters in Italy with fiscal residence in Italy and, therefore, was subject to taxation in Italy. The Tax Court held a hearing on December 4, 2014 and thereafter scheduled another hearing for April 16, 2015. The Company believes the Italian tax claims are without merit and intends to vigorously defend against them.
	Litigation-Environmental Matters
	From time to time, Magnetek has taken action to bring certain facilities associated with previously owned businesses into compliance with applicable environmental laws and regulations. Upon the subsequent sale of certain businesses, the Company agreed to indemnify the buyers against environmental claims associated with the divested operations, subject to certain conditions and limitations. Remediation activities, including those related to the Company's indemnification obligations, did not involve material expenditures during fiscal years 2014, 2013, or 2012.
	The Company has also been identified by the United States Environmental Protection Agency and certain state agencies as a potentially responsible party for clean-up costs associated with alleged past waste disposal practices at several previously utilized, owned or leased facilities and offsite locations. Its remediation activities as a potentially responsible party were not material in fiscal years 2014, 2013 or 2012. Although the materiality of future expenditures for environmental activities may be affected by the level and type of contamination, the extent and nature of clean-up activities required by governmental authorities, the nature of the Company's alleged connection to the contaminated sites, the number and financial resources of other potentially responsible parties, the availability of indemnification rights against third parties and the identification of additional contaminated sites, the Company's estimated share of liability, if any, for environmental remediation, including its indemnification obligations, is not expected to be material.
	Bridgeport, Connecticut Facility
	In 1986, the Company acquired the stock of Universal Manufacturing Company (“Universal”) from a predecessor of Fruit of the Loom (“FOL”), and the predecessor agreed to indemnify the Company against certain environmental liabilities arising from pre-acquisition activities at a facility in Bridgeport, Connecticut. Environmental liabilities covered by the indemnification agreement included completion of additional clean-up activities, if any, at the Bridgeport facility and defense and indemnification against liability for potential response costs related to offsite disposal locations. The Company's leasehold interest in the Bridgeport facility was assigned to the buyer in connection with the sale of the Company's transformer business in June 2001. FOL, the successor to the indemnification obligation, filed a petition for Reorganization under Chapter 11 of the Bankruptcy Code in 1999 and the Company filed a proof of claim in the proceeding for obligations related to the environmental indemnification agreement. The Company believes that FOL had substantially completed the clean-up obligations required by the indemnification agreement prior to the bankruptcy filing. In November 2001, the Company and FOL entered into an agreement involving the allocation of certain potential tax benefits and Magnetek withdrew its claims in the bankruptcy proceeding. The Company further believes that FOL's obligation to the state of Connecticut was not discharged in the reorganization proceeding.
	In January 2007, the Connecticut Department of Environmental Protection (“DEP”) requested parties, including the Company, to submit reports summarizing the investigations and remediation performed to date at the site and the proposed additional investigations and remediation necessary to complete those actions at the site. DEP requested additional information from the Company relating to site investigations and remediation. The Company retained an environmental consultant to review and prepare reports on historical operations and environmental activities at the Bridgeport facility. In November 2009, the Company submitted its site summary report and proposed work plan to the DEP and in October 2010 submitted a revised work plan to the DEP.  The Company and the DEP agreed to the scope of the work plan in November 2010.  The Company has recorded a liability of $0.4 million related to the Bridgeport facility, representing the Company's best estimate of future site investigation costs and remediation costs which are expected to be incurred in the future. The liability is included in accrued liabilities in the consolidated balance sheet as of December 28, 2014.
	FOL's inability to satisfy its remaining obligations to the state of Connecticut related to the Bridgeport facility and any offsite disposal locations or the discovery of additional environmental contamination at the Bridgeport facility could have a material adverse effect on the Company's financial position, cash flows or results of operations.
	Letters of Credit
	The Company had approximately $0.8 million of outstanding letters of credit as of December 28, 2014.

StockBased_Compensation_Agreem

Stock-Based Compensation Agreements	12 Months Ended
	Dec. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation Agreements	Stock-Based Compensation Agreements
	The Company has two stock option plans (the "Plans"), one of which provides for the issuance of both incentive stock options (under Section 422A of the Internal Revenue Code of 1986) and non-qualified stock options at exercise prices not less than the fair market value of the Company’s common stock at the date of grant, and one of which provides only for the issuance of non-qualified stock options at exercise prices not less than the fair market value of the Company’s common stock at the date of grant. One of the Plans also provides for the issuance of stock appreciation rights, restricted stock, incentive bonuses and incentive stock units. The total number of shares of the Company's common stock available for issuance of stock options and other stock rights under the Plans is approximately 236 thousand shares.
	Under the provisions of the Plans, key employees and non-employee directors may be granted options to purchase shares of Magnetek common stock at a price not less than its fair market value on the date of grant. Options granted have a maximum term of 10 years. Vesting requirements are determined at the discretion of the Compensation Committee of the Company’s Board of Directors, with vesting periods generally ranging from two to four years.  The Company uses the Black-Scholes option pricing model to calculate the fair value of stock options. The key assumptions for the Black-Scholes valuation method include the expected life of the option, stock price volatility, a risk-free interest rate, and dividend yield.  Many of these assumptions are judgmental and highly sensitive.  Following is a table of the weighted average fair value of the Company’s stock option grants for fiscal years 2014, 2013, and 2012 using the Black-Scholes valuation model, assuming no dividends, with the following assumptions:
		Fiscal Year Ended
		December 28, 2014				December 29, 2013				December 30, 2012
	Expected life in years	6.5				5.8				5.3
	Expected stock price volatility	66.4		%		70.9		%		74.9		%
	Risk-free interest rate	2		%		2		%		0.8		%
	Options granted (in thousands)	3				6				15
	Weighted average fair value of options granted	$	23.94			$	14.03			$	6.47
	Compensation expense related to stock option awards is recognized ratably over the vesting period.
	The Company also awards restricted shares of the Company’s common stock to key employees under the provisions of one of the Plans.  Restrictions on the shares expire either after completion of a service period, typically three years, or upon achievement of established performance objectives, as determined by the Compensation Committee of the Company’s Board of Directors.  Shares are valued at the market price on the date of award. Compensation expense related to these awards is recognized ratably over the service period.
	During fiscal 2014, 2013, and 2012, the Company recorded $0.6 million, $0.7 million, and $0.8 million, respectively, of stock-based compensation related to share-based awards.  Stock-based compensation expense is included in sales, general and administrative expense in the accompanying consolidated statements of operations.  As of December 28, 2014, there was $0.8 million of total unrecognized compensation cost related to all stock option and restricted share grants, to be expensed ratably over a weighted-average remaining period of 1.8 years.
	A summary of certain information with respect to outstanding stock options under the Plans follows (options in thousands):
		Options			Weighted-				Aggregate
					Average				Intrinsic
					Exercise				Value
					Price				($000's)
	Options outstanding, January 1, 2012	179			$	32.67			$	1
	Granted	15			$	10.41
	Exercised	—			$	—
	Canceled	(20	)		$	65.26
	Options outstanding, December 30, 2012	174			$	26.88			$	18
	Granted	6			$	22.23
	Exercised	(8	)		$	12.06
	Canceled	(25	)		$	22.67
	Options outstanding, December 29, 2013	147			$	28.22			$	624
	Granted	3			$	38
	Exercised	—			$	—
	Canceled	(22	)		$	68.82
	Options outstanding, December 28, 2014	128			$	21.39			$	2,209
	Exercisable options, January 1, 2012	112			$	43.42			$	—
	Exercisable options, December 30, 2012	115			$	34.91			$	9
	Exercisable options, December 29, 2013	132			$	29.87			$	486
	Exercisable options, December 28, 2014	119			$	20.89			$	2,119
	The following table provides information regarding exercisable and outstanding options as of December 28, 2014 (options in thousands):
		Exercisable									Outstanding
	Range of exercise price per share	Options			Weighted				Weighted		Options		Weighted		Weighted
		exercisable			average				average		outstanding		average		average
					exercise				remaining				exercise		remaining
					price per				contractual				price per		contractual
					share				life (years)				share		life (years)
	$8.48 - $10.00	8			$	8.48			7		8		$	8.48	7
	$10.01 - $15.00	38			11.27				6.3		38		11.26		6.3
	$15.01 - $20.00	7			17.79				6.5		7		17.79		6.5
	$20.01 - $30.00	45			22.68				3.7		51		22.63		4.3
	$30.01 - $53.10	21			39.82				2.9		24		39.57		3.9
	Total	119			$	20.89			4.8		128		$	21.39	5.1
	The following table provides information regarding vested and unvested restricted stock activity for fiscal years 2012, 2013, and 2014 (shares in thousands):
		Shares			Weighted				Fair value
					average				of vested
					grant date				shares at
					fair value				vesting date
	Unvested at January 1, 2012	112			$	13.48
	Granted	46			$	16.66
	Vested	(42	)		$	14.85			$	437
	Forfeited	(11	)		$	13.38
	Unvested at December 30, 2012	105			$	14.35
	Granted	66			$	12.6
	Vested	(37	)		$	12.28			$	618
	Forfeited	(3	)		$	11.5
	Unvested at December 29, 2013	131			$	14.11
	Granted	41			$	19.09
	Vested	(21	)		$	13.66			$	587
Forfeited	—			—
Unvested at December 28, 2014	151			$	15.54
Included in the table above are 35 thousand performance-based awards granted in the period ended December 29, 2013, that are not expected to vest as the performance target is unlikely to be achieved.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 28, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans
	The Company maintains a defined benefit pension plan (the “pension plan”) for the benefit of eligible employees, former employees, and retirees in the U.S.   The pension plan has been frozen since 2003, and since that time, participant accounts have not been credited with any additional years of service or additional compensation, but rather only with interest on accrued balances. The pension plan is managed in compliance with all provisions of the Employee Retirement Income Security Act of 1974, as amended ("ERISA"), the Investment Advisers Act of 1940, and other applicable laws. The Company funds the pension plan in accordance with applicable employee benefit and tax laws, primarily the Pension Protection Act of 2006, as amended ("PPA"). The primary purpose of the pension plan is to provide a source of retirement income for plan participants and beneficiaries.
	Net pension expense for the Company’s pension plan follows:
			Fiscal Year Ended
			28-Dec-14			29-Dec-13			30-Dec-12
	Interest cost		$	8,766		$	7,854		$	8,655
	Expected return on plan assets		(12,435		)	(10,246		)	(9,741		)
	Recognized net actuarial loss		44,018			8,757			8,022
	Net pension expense		$	40,349		$	6,365		$	6,936
	During 2014, in an effort to reduce the size, volatility, mortality risk, and costs of the pension plan, the Company offered a lump sum payout of pension benefits (a “lump sum window”) to 2,970 eligible deferred vested participants. The program, which was funding-neutral, was completed in December 2014. A total of 2,230 participants, or 75%, elected the lump sum option, with a total amount of $46.9 million paid out of pension plan assets. The Company’s pension liability was reduced by a similar amount. Recognized net actuarial loss for fiscal 2014 in the table above includes a settlement charge of $37.1 million related to the lump sum window. The settlement charge represents accelerated amortization of actuarial pension losses which were recorded on the Company’s balance sheet in accumulated other comprehensive loss as a reduction in stockholders’ equity. These losses would otherwise have been amortized to the income statement over time as a component of future pension expense. The settlement charge had no impact on the Company’s cash flow or financial position and is expected to reduce future pension expense. Excluding the impact of this settlement charge, fiscal 2014 pension expense would have been approximately $3.2 million.
	Net pension expense for fiscal 2015 is estimated at $2.0 million.  During that time, it is expected that $6.7 million of amounts included in accumulated other comprehensive loss will be recognized in net periodic benefit cost.  The expected long-term rate of return on pension plan assets in determining fiscal 2015 pension expense is 7.75%.
	Pension benefit obligations at year-end, the fair value of pension plan assets, and the pension plan funded status are as follows:
			December 28, 2014			December 29, 2013
	Change in Benefit Obligation:
	Benefit obligation at beginning of period		$	209,064		$	230,257
	Interest cost		8,766			7,854
	Actuarial loss (gain)		12,006			(17,762		)
	Settlements		(47,830		)	—
	Benefits paid		(12,337		)	(11,285		)
	Benefit obligation at end of period		$	169,669		$	209,064
	Change in Plan Assets:
	Fair value of plan assets at beginning of period		$	160,603		$	127,917
	Actual return on plan assets		14,563			19,115
	Employer contributions		26,428			24,856
	Settlements		(46,948		)	—
	Benefits paid		(12,337		)	(11,285		)
	Fair value of plan assets at end of period		$	142,309		$	160,603
	Funded status		$	(27,360	)	$	(48,461	)
	Unrecognized net actuarial loss		134,048			169,070
	Net amount recognized		$	106,688		$	120,609
	Amounts Recognized in Statement of Financial Position:
	Pension benefit obligations, net		$	(27,360	)	$	(48,461	)
	Accumulated other comprehensive loss		134,048			169,070
	Net amount recognized		$	106,688		$	120,609
	The pension plan has been in a net under-funded position for the past several years, and as a result, the Company recognized an additional minimum pension liability on its balance sheet in accordance with ASC 715.  The pension plan’s unrecognized losses of $134.0 million and $169.1 million (excluding tax benefits of $17 million) at December 28, 2014, and December 29, 2013, respectively, have been recorded as a reduction to equity in accumulated other comprehensive loss on the Company’s consolidated balance sheets.
	During fiscal years 2014 and 2013, the Company made contributions totaling $26.4 million and $24.9 million to the pension plan. Contributions for fiscal 2014 included minimum required contributions of $19.1 million in cash and a voluntary excess contribution in September 2014 of 250,000 shares of Company common stock valued at $7.4 million at the time of the contribution. Based upon current actuarial projections and pension funding regulations, future minimum required contributions to the pension plan to achieve fully funded status are estimated at $25.0 million. There are no minimum required contributions for fiscal 2015. The net present value of the future minimum required contributions, discounted at 4.9%, is estimated at $19.9 million. Required contributions after fiscal 2015 are subject to change and will depend on future interest rate levels, values in equity and fixed income markets, and the level and timing of interim contributions we may make to the pension plan.
	Weighted average assumptions used to determine benefit cost and benefit obligation for the pension plan follow:
			Fiscal Year Ended
			December 28, 2014		December 29, 2013	30-Dec-12
	Discount rate used to determine benefit obligation		3.55%		4.45%	3.50%
	Discount rate used to determine benefit cost		4.45%		3.50%	4.05%
	Expected return on plan assets		7.75%		7.75%	8.25%
	Measurement date for pension benefit obligations		December 28, 2014		December 29, 2013	December 30, 2012
	The Company's expected rate of return on plan assets is determined in part by reviewing past actual investment returns of plan assets and historical returns of the Company's asset allocation targets. In addition, management reviews assessments of the current market environment based on a variety of data sources by asset class, including correlations between economic growth, volatility, risk, return rates, interest rates, and inflation, applied to a number of different time periods, seeking time periods that are most representative of current markets. In reviewing these assessments, management relies in part on input
	from the Company's independent investment manager and actuaries, who provide asset-liability modeling and other advice services which simulate how pension assets and liabilities will respond under different investment and interest rate scenarios. These models incorporate the Company's specific liability and cash flow information as well as other factors that influence the pension plan liability and corresponding assets. In addition, management periodically evaluates actual returns against appropriate benchmarks to determine if actual return rates were commensurate with expectations. Based on the Company's analysis of past actual return rates, current and expected asset allocations, and future expectations of asset performance, the long-term expected rate of return on assets remained unchanged at 7.75% for cost recognition purposes for fiscal 2014.
	The Company has adopted an investment policy which is periodically reviewed and updated. The primary objective of the investment policy is to maximize the funded status of the pension plan based on a long-term investment horizon. The Company's long-term strategic investment objectives take into consideration a number of factors, including the funded status of the plan, the plan's projected liquidity needs, the demographics of the plan's participants, and a consideration of the probability and duration of investment losses weighted against the potential for long-term appreciation of assets.
	The Company's investment policy also establishes asset allocation targets (guidelines) for each primary asset class. The asset allocation targets per the Company's most recently adopted investment policy statement are as follows:
	Asset Class	Target Allocation
	Equity	40% to 70%
	Fixed income	15% to 50%
	Alternative investments	0% to 10%
	Cash	0% to 10%
	Rapid unanticipated market shifts or changes in economic conditions may cause the asset mix to fall outside the target allocations. Generally these divergences should be of a short-term nature, and rebalancing may be necessary. Investments are diversified within asset classes with the intent of minimizing risk of large losses to the pension plan while maintaining liquidity sufficient to fund current benefit payments.
	The strategy for equity holdings is to provide opportunities to earn higher rates of return than with fixed income investments, while minimizing concentrations of risk by investing in a diversified mix of companies and industries worldwide, with varying market capitalization levels, growth and value profiles, fund types, and fund managers. The U.S equity holdings portion of the portfolio consists primarily of equity securities or mutual funds of companies listed on registered exchanges or actively traded in the over-the-counter markets. International equity holdings consist primarily of equity securities of non-U.S. issuers purchased in foreign markets, on U.S. or foreign exchanges, or the over-the-counter markets.
	The fixed income investment strategy includes longer term maturities which match longer duration pension liabilities, and also includes the higher yield alternatives which are shorter in duration and allow for higher potential returns. Fixed income holdings include core fixed income securities rated investment grade or better, such as bonds and debentures issued by domestic and foreign private and governmental issuers, as well as high-yield fixed income securities rated below investment grade. The emerging market debt portion of the portfolio consists primarily of debt securities rated below investment grade of government and corporate issuers in emerging market countries and of entities organized to restructure outstanding debt of such issuers. The primary strategy for investing in emerging market debt is to provide opportunities to earn higher returns than core fixed income.
	Limited partnership holdings consist primarily of investments in hedge funds and private investment funds. The portfolio may be allocated across several hedge fund styles and strategies, and may include equity securities, debt securities, asset-backed securities, exchange-traded funds, and derivatives. Investments in limited partnerships provide opportunities to earn above market returns.
	The fair values of pension plan assets as of December 28, 2014, follows:
			Balance as of			Quoted Prices			Significant			Significant
						in Active Markets			Other Observable			Unobservable
						for Identical Assets			Inputs			Inputs
	Pension Plan Assets		December 28, 2014			(Level 1)			(Level 2)			(Level 3)
	Cash and cash equivalents		$	387		$	387		$	—		$	—
	Equity holdings:
	U.S. large cap		19,210			19,210			—			—
U.S. small cap		12,461			12,461			—			—
U.S. blended cap		22,946			22,946			—			—
International equity		27,604			27,604			—			—
Total equity holdings		82,221			82,221			—			—
Fixed income holdings:
Core fixed income		26,851			—			26,851			—
Diversified short term debt		3,535			—			3,535			—
Emerging market debt		4,795			—			4,795			—
High yield debt		3,626			—			3,626			—
Total fixed income holdings		38,807			—			38,807			—
Multi asset class holdings		4,521			—			4,521			—
Limited partnership holdings		16,373			—			16,373			—
Total pension plan assets		$	142,309		$	82,608		$	59,701		$	—
Pension plan assets invested in U.S. small cap equity in the table above include 201,550 shares of Company common stock valued at $7,659.
Subsequent to the end of fiscal 2014, the Company liquidated all of the pension plan's limited partnership holdings, except for a required 10% retention amount expected to be liquidated within six months. The proceeds from the limited partnership holding were invested into equity and fixed income holdings. As a result, the pension plan's asset allocation as of February 2015 was approximately 59% in equity holdings and 42% in fixed income holdings, with 1% retained in limited partnership holdings.
The fair values of pension plan assets as of December 29, 2013, follows:
		Balance as of			Quoted Prices			Significant			Significant
					in Active Markets			Other Observable			Unobservable
					for Identical Assets			Inputs			Inputs
Pension Plan Assets		December 29, 2013			(Level 1)			(Level 2)			(Level 3)
Cash and cash equivalents		$	3		$	3		$	—		$	—
Equity holdings:
U.S. large cap		21,273			21,273			—			—
U.S. small cap		7,216			7,216			—			—
U.S. blended cap		27,794			27,794			—			—
International equity		34,503			34,503			—			—
Total equity holdings		90,786			90,786			—			—
Fixed income holdings:
Core fixed income		13,654			—			13,654			—
Diversified short term debt		9,732			—			9,732			—
Emerging market debt		7,942			—			7,942			—
High yield debt		2,517			—			2,517			—
Total fixed income holdings		33,845			—			33,845			—
Multi asset class holdings		15,032			—			15,032			—
Limited partnership holdings		20,937			—			20,937			—
Total pension plan assets		$	160,603		$	90,789		$	69,814		$	—
Pension plan assets do not include any shares of Company common stock as of December 29, 2013.
The Company uses the market approach in determining the fair value of pension assets, which uses observable prices and other information generated by market transactions involving identical or comparable assets. Cash is valued at cost, which approximates fair value.
The valuation of level 1 assets reflects quoted closing market prices from the exchanges where the securities are actively traded.
Level 2 assets are valued using observable inputs for similar assets in active markets, or identical assets in inactive markets. Debt securities categorized as level 2 assets are generally valued based on independent broker/dealer bids, or by comparison to other debt securities having similar durations, yields, and credit ratings. The fair value of the Company's pension plan investments in limited partnership holdings have been estimated using the net asset value per share of the investment as a practical expedient.
Level 3 assets are fund investments in private companies, and are typically valued using entity-specific inputs, including discounted cash flow analysis, earnings multiple approaches, recent transactions, volatilities, and other factors.
Expected future benefit payments under the pension plan by fiscal year are as follows:
Fiscal		Benefit
Year		Payment
2015		$	12,557
2016		12,372
2017		12,237
2018		12,001
2019		11,817
2020-2024		55,101
In addition to the pension plan, the Company maintains a defined contribution savings plan (“401k plan”) for eligible employees.  Contributions made by the Company to the 401k plan during fiscal 2014, 2013, and 2012 were $453, $444, and $449, respectively.

Warranties

Warranties	12 Months Ended
	Dec. 28, 2014
Product Warranties Disclosures [Abstract]
Warranties	Warranties
	The Company offers warranties for certain products that it manufactures, with the warranty term generally ranging from one to two years.  Warranty reserves are established for costs expected to be incurred after the sale and delivery of products under warranty, based mainly on known product failures and historical experience, and are included in accrued liabilities in the accompanying consolidated balance sheets.
	Changes in the warranty reserve for fiscal years 2014 and 2013 follow:
		December 28,			December 29,
		2014			2013
	Balance at beginning of period	$	379		$	370
	Amounts charged to earnings, net	377			603
	Use of reserve for warranty obligations	(401		)	(594		)
	Balance at end of period	$	355		$	379

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 28, 2014
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information
	Changes in operating assets and liabilities of continuing operations follow:
		Fiscal Year Ended
	Fiscal period ended	December 28,			December 29,			December 30,
		2014			2013			2012
	(Increase) decrease in accounts receivable	$	(1,875	)	$	733		$	906
	(Increase) decrease in inventories	(304		)	1,546			(1,163		)
	(Increase) decrease in prepaid expenses and other current assets	13			(104		)	222
	(Increase) decrease in other assets	310			747			226
	Increase (decrease) in accounts payable	(28		)	(1,559		)	(1,339		)
	Increase (decrease) in accrued liabilities	1,897			(915		)	(317		)
	Increase (decrease) in operating assets and liabilities	$	13		$	448		$	(1,465	)
	Cash paid for interest and income taxes :
	Interest	$	—		$	—		$	—
	Income taxes	$	18		$	57		$	210

Accrued_Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 28, 2014
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities
	Accrued liabilities consist of the following:
		December 28,		December 29,
		2014		2013
	Salaries, wages, and incentive compensation	$	2,679	$	598
	Commissions	771		612
	Customer deposits	725		758
	Environmental	706		708
	Warranty	355		379
	All other	1,467		1,778
	Total accrued liabilities	$	6,703	$	4,833

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 28, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)
	Accumulated other comprehensive income (loss) is comprised primarily of the cumulative balance of adjustments related to the Company's defined benefit pension plan ("pension plan", see Note 12 of Notes to Consolidated Financial Statements). Changes in accumulated other comprehensive income (loss) are shown by component in the table below. The pension plan's unrecognized losses are net of a $17.0 million income tax benefit at the end of each fiscal year. Amounts reclassified to net income in the table below represent the amortization of actuarial losses related to the Company's pension plan and are included in pension expense in the accompanying consolidated statements of operations.
								Accumulated
		Defined			Foreign			Other
		Benefit			Currency			Comprehensive
		Pension			Translation			Income
		Plan			Adjustments			(Loss)
	Balance, January 1, 2012	$	(178,592	)	$	739		$	(177,853	)
	Other comprehensive income (loss):
	Income (loss) before reclassifications	(16,889		)	132			(16,757		)
	Amounts reclassified to net income	8,022			—			8,022
	Total other comprehensive income (loss)	(8,867		)	132			(8,735		)
	Balance, December 30, 2012	(187,459		)	871			(186,588		)
	Other comprehensive income (loss):
	Income (loss) before reclassifications	26,632			(284		)	26,348
	Amounts reclassified to net income	8,757			—			8,757
	Total other comprehensive income (loss)	35,389			(284		)	35,105
	Balance, December 29, 2013	(152,070		)	587			(151,483		)
	Other comprehensive income (loss):
	Income (loss) before reclassifications	(8,996		)	(421		)	(9,417		)
	Amounts reclassified to net income	44,018			—			44,018
	Total other comprehensive income (loss)	35,022			(421		)	34,601
	Balance, December 28, 2014	$	(117,048	)	$	166		$	(116,882	)

Business_Segment_and_Geographi

Business Segment and Geographic Information	12 Months Ended
	Dec. 28, 2014
Segment Reporting [Abstract]
Business Segment and Geographic Information	Business Segment and Geographic Information
	The Company currently operates within a single business segment, digital power control systems, and sells its products primarily to large original equipment manufacturers. The Company performs ongoing credit evaluations of its customers' financial conditions and generally requires no collateral.  The Company does not have any single customer whose purchases represented 10% or more of the Company’s total revenue in fiscal year 2014, 2013, or 2012.
	Information with respect to the Company's foreign subsidiaries follows:
		Fiscal Year Ended
		December 28,		December 29,		December 30,
		2014		2013		2012
	Sales	$	6,490	$	6,694	$	7,164
	Income from operations	205		368		447
	Identifiable assets	6,455		7,882		6,553
	Capital expenditures	20		36		—
	Depreciation and amortization	19		31		26
	Sales by foreign subsidiaries include sales of products to customers within the U.S.
	Export sales from the United States were $5,279 during fiscal 2014, $4,625 during fiscal 2013, and $6,698 during fiscal 2012.

Quarterly_Results

Quarterly Results	12 Months Ended
	Dec. 28, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results (unaudited)	Quarterly Results (unaudited)
	The supplementary financial information presented below provides quarterly financial data for fiscal year 2014 and for fiscal year 2013.
	Fiscal 2014 quarter ended	March 30,			June 29,			September 28,			December 28,
		2014			2014			2014			2014
	Net sales	$	24,113		$	27,009		$	29,576		$	29,015
	Gross profit	8,152			9,715			10,927			11,157
	Income (loss) from operations	1,438			2,750			3,340			(33,258		)
	Income (loss) from continuing operations before income taxes	1,438			2,750			3,340			(33,258		)
	Provision for income taxes	240			240			131			104
	Income (loss) from continuing operations	1,198			2,510			3,209			(33,362		)
	Income (loss) from discontinued operations	(144		)	(213		)	—			(461		)
	Net income (loss)	$	1,054		$	2,297		$	3,209		$	(33,823	)
	Earnings per common share - basic:
	Income (loss) from continuing operations	$	0.37		$	0.77		$	0.96		$	(9.44	)
	Income (loss) from discontinued operations	$	(0.05	)	$	(0.07	)	$	—		$	(0.13	)
	Net income (loss)	$	0.32		$	0.7		$	0.96		$	(9.57	)
	Earnings per common share - diluted:
	Income (loss) from continuing operations	$	0.35		$	0.74		$	0.88		$	(9.44	)
	Income (loss) from discontinued operations	$	(0.04	)	$	(0.06	)	$	—		$	(0.13	)
	Net income (loss)	$	0.31		$	0.68		$	0.88		$	(9.57	)
	Fiscal 2013 quarter ended	March 31,			June 30,			September 29,			December 29,
		2013			2013			2013			2013
	Net sales	$	25,059		$	27,006		$	26,011		$	25,240
	Gross profit	8,142			9,343			9,175			8,665
	Income (loss) from operations	806			1,473			1,545			951
	Income (loss) from continuing operations before income taxes	806			1,473			1,545			951
	Provision for income taxes	261			280			262			213
	Income (loss) from continuing operations	545			1,193			1,283			738
	Income (loss) from discontinued operations	(73		)	(28		)	(161		)	(365		)
	Net income (loss)	$	472		$	1,165		$	1,122		$	373
	Earnings per common share - basic:
	Income (loss) from continuing operations	$	0.17		$	0.37		$	0.4		$	0.23
	Income (loss) from discontinued operations	$	(0.02	)	$	(0.01	)	$	(0.05	)	$	(0.11	)
	Net income (loss)	$	0.15		$	0.36		$	0.35		$	0.12
	Earnings per common share - diluted:
	Income (loss) from continuing operations	$	0.16		$	0.36		$	0.38		$	0.22
	Income (loss) from discontinued operations	$	(0.02	)	$	(0.01	)	$	(0.04	)	$	(0.11	)
	Net income (loss)	$	0.14		$	0.35		$	0.34		$	0.11

Valuation_and_Qualifying_Accou

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 28, 2014
Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	VALUATION AND QUALIFYING ACCOUNTS
	FISCAL YEARS ENDED DECEMBER 30, 2012, DECEMBER 29, 2013, AND DECEMBER 28, 2014
	(amounts in thousands)
		Balance at		Additions charged		Deductions			Other			Balance at
		beginning		(recoveries added)		from						end of year
		of year		to earnings		allowance
	30-Dec-12
	Allowance for doubtful accounts	$	206	$	13	$	—		$	—		$	219
	29-Dec-13
	Allowance for doubtful accounts	$	219	$	13	$	(16	)	$	(1	)	$	215
	28-Dec-14
	Allowance for doubtful accounts	$	215	$	39	$	(48	)	$	—		$	206

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 28, 2014
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year
	On August 4, 2011, the Company's Board of Directors approved a change in the Company's fiscal year-end from the Sunday nearest to June 30 of each calendar year to the Sunday nearest to December 31, with the change to a calendar year reporting cycle beginning January 2, 2012. The intent of the change was to align the reporting of financial results more closely with peers and to better align the Company's business cycle with suppliers and customers. Fiscal years 2014, 2013, and 2012 refer to the twelve-month periods ended December 28, 2014, December 29, 2013, and December 30, 2012, respectively, and each fiscal year contained 52 weeks.
Use of Estimates	Use of Estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Accounts Receivables	Accounts Receivable
	Accounts receivable represent amounts due from customers in the ordinary course of business.  The Company is subject to losses from uncollectable receivables in excess of its allowances.  The Company maintains allowances for doubtful accounts for estimated losses from customers’ inability to make required payments.  In order to estimate the appropriate level of these allowances, the Company analyzes historical bad debts, customer concentrations, current customer creditworthiness, current economic trends, and changes in customer payment patterns.  If the financial conditions of the Company’s customers were to deteriorate and impair their ability to make payments, additional allowances may be required in future periods.
Inventories	Inventories
	The Company’s inventories are stated at the lower of cost or market.  Cost is determined by the first-in, first-out (“FIFO”) method, including material, labor and factory overhead.  Existing inventory on hand may exceed future demand either because the product is obsolete, or the amount on hand is more than can be used to meet future needs.  The Company identifies potentially obsolete and excess inventory by evaluating overall inventory levels in relation to past and anticipated usage levels.  In assessing the ultimate realization of inventories, the Company is required to make judgments as to future demand requirements and compare those with the current or committed inventory levels.  If future demand requirements are less favorable than those projected by management, additional inventory write-downs may be required.
Reserves for Litigation and Environmental Issues	Reserves for Litigation and Environmental Issues
	The Company periodically records the estimated impacts of various conditions, situations, or circumstances involving uncertain outcomes.  The accounting for such events is prescribed under ASC Topic 450, Contingencies.  The Company does not record gain contingencies under any circumstances.  For loss contingencies, the loss must be accrued if information is available that indicates it is probable that the loss has been incurred, given the likelihood of uncertain events, and if the amount of the loss can be reasonably estimated.
	The accrual of a contingency involves considerable judgment on the part of management.  The Company uses its internal expertise and outside experts, as necessary, to help estimate the probability that a loss has been incurred and the amount or range of the loss.
Income Taxes	Income Taxes
	The Company uses the liability method to account for income taxes.  The preparation of consolidated financial statements involves estimating the Company’s current tax exposure together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes.  These differences result in deferred tax assets and liabilities, which are included in the consolidated balance sheets.  An assessment of the recoverability of deferred tax assets is made, and a valuation allowance is established if necessary based upon this assessment.
Pension Benefits	Pension Benefits
	The valuation of the Company’s pension plan requires the use of assumptions and estimates to develop actuarial valuations of pension expense, pension assets, and pension liabilities.  These assumptions include discount rates, investment returns, and mortality rates.  Changes in these assumptions could potentially have a material impact on the Company’s pension expense and related funding requirements.
Restricted Cash	Restricted Cash
	At December 28, 2014, and December 29, 2013, the Company had $0.3 million of restricted cash related to minimum balance requirements associated with procurement of certain raw materials and supplies.
Revenue Recognition	Revenue Recognition
	The Company’s policy is to recognize revenue when the earnings process is complete.  The criteria used in making this determination are persuasive evidence that an arrangement exists, delivery has occurred, the sales price is fixed or determinable, and collectability is reasonably assured.  Sales are recorded net of returns and allowances, which are estimated using historical data, at the time of sale.
	Terms of shipment are free on board shipping point, and payment is not contingent upon resale or any other matter other than passage of time.  As a result, title to goods passes upon shipment.  Amounts billed to customers for shipping costs are reflected in net sales; shipping costs are reflected in cost of sales.
Property, Plant and Equipment	Property, Plant and Equipment
	Additions and improvements are capitalized at cost, whereas expenditures for maintenance and repairs are charged to expense as incurred. Depreciation is provided over the estimated useful lives of the respective assets principally on the straight-line method (machinery and equipment normally five to ten years; buildings and leasehold improvements over the shorter of the lease term or the economic life, estimated at ten to forty years).
Goodwill	Goodwill
	In accordance with ASC Topic 350, Goodwill and Other Intangible Assets, the Company reviews the carrying value of goodwill at least annually and more frequently if indicators of potential impairment arise. Goodwill represents the excess of the amount paid to acquire the Company over the estimated fair value of the net tangible and intangible assets acquired as of the acquisition date. Conditions that would trigger an impairment assessment include, but are not limited to, a significant adverse change in legal factors or business climate that could affect the value of an asset.
	The Company performed the required annual impairment tests for fiscal years 2014, 2013, and 2012, and found no impairment of goodwill. There can be no assurance that future goodwill impairment tests will not result in a charge to earnings.
Intangible Assets	Intangible Assets
	Additions to intangible assets are capitalized at fair market value and the carrying value of indefinite-lived intangibles is reviewed for impairment if indicators of impairment arise. Intangible assets, which consist principally of patents, are included in other assets in the consolidated balance sheets, and are amortized over the estimated useful lives of the respective assets, principally on the straight-line method.  In fiscal 2009 and fiscal 2010, the Company acquired several patents related to the design and manufacture of digital DC drives for material handling and mining applications.  The cost of the patents, $533 as of December 28, 2014, and December 29, 2013, was capitalized and is included in other assets in the consolidated balance sheets.  The estimated useful life of the patents is 10 years. Accumulated amortization of the patents as of December 28, 2014, and December 29, 2013, was $344 and $291, respectively, resulting in a net carrying value as of those dates of $189 and $242, respectively. The Company does not believe any indicators of impairment of the intangible assets occurred in fiscal years 2014, 2013, or 2012. There can be no assurance that future intangible asset impairment tests will not result in a charge to earnings.
Stock-Based Compensation	Stock-Based Compensation
	The Company records stock-based compensation expenses in accordance with ASC Topic 718, Stock Compensation. Compensation expense related to all stock-based awards for fiscal years 2014, 2013, and 2012 is included in sales, general and administrative expense in the consolidated statements of operations.  No tax benefit was recorded on the stock compensation expense for fiscal years 2014, 2013, and 2012 due to deferred tax valuation allowances recorded by the Company in those years.
Research and Development	Research and Development
	Expenditures for research and development are charged to expense as incurred and totaled $3,174 for fiscal 2014, $3,246 for fiscal 2013, and $3,834 for fiscal 2012.
Advertising	Advertising
	Expenditures for advertising are charged to expense as incurred and totaled $22 for fiscal year 2014, $58 for fiscal year 2013, and $88 for fiscal year 2012.
Foreign Currency Translation	Foreign Currency Translation
	The accounts of the Company’s foreign entities are measured using local currency as the functional currency.  Assets and liabilities are translated to the reporting currency (U.S. Dollar) at the exchange rate in effect at year-end.  Revenues and expenses are translated at the rates of exchange prevailing during the year.  Unrealized translation gains and losses arising from differences in exchange rates from period to period are included as a component of accumulated other comprehensive gain or loss in stockholders’ equity.
Earnings Per Share	Earnings Per Share
	In accordance with ASC Topic 260, Earnings Per Share, basic earnings per share is computed using the weighted average number of common shares outstanding during the period. Diluted earnings per common share incorporate the incremental shares issuable upon the assumed vesting of restricted stock and the exercise of stock options as if all vesting and exercises had occurred at the beginning of the fiscal year, whereas diluted loss per common share does not incorporate these incremental shares.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board issued Accounting Standards Codification ("ASC") 606-10, Revenue for Contracts with Customers (issued under Accounting Standards Update No. 2014-09). ASC 606-10 will be effective for the year beginning on or around January 1, 2017, and will replace all existing revenue recognition guidance. The Company is in the process of determining whether the adoption of ASC 606-10 will have an impact on the Company's results of operations, financial position, or cash flows.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 28, 2014
Discontinued Operations and Disposal Groups [Abstract]
Results of discontinued operations	The results of discontinued operations follow:
		Fiscal Year Ended
		December 28,			December 29,			December 30,
		2014			2013			2012
	Income (loss) from discontinued operations before interest and income taxes	$	(818	)	$	(627	)	$	703
	Income on sale of telecom power systems business	—			—			32
	Gain from settlement agreement, net of fees	—			—			4,962
	Income (loss) from discontinued operations	$	(818	)	$	(627	)	$	5,697

Goodwill_Tables

Goodwill (Tables)	12 Months Ended
	Dec. 28, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Change in the carrying value of goodwill	The change in the carrying value of goodwill for the periods ended December 28, 2014, and December 29, 2013, is as follows:
		December 28,		December 29,
		2014		2013
	Balance at beginning of period	$30,427		$30,485
	Currency translation	(63	)	(58	)
	Balance at end of period	$30,364		$30,427

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 28, 2014
Inventory Disclosure [Abstract]
Inventory components	Inventories consist of the following:
		December 28,		December 29,
		2014		2013
	Raw materials	$	8,710	$	8,531
	Work in process	1,252		1,344
	Finished goods	3,664		3,447
	Total inventory	$	13,626	$	13,322

Earnings_Loss_Per_Share_Tables

Earnings (Loss) Per Share (Tables)	12 Months Ended
	Dec. 28, 2014
Earnings Per Share [Abstract]
Schedule of earnings per share reconciliation	The following table sets forth the computation of basic and diluted earnings (loss) per share for the periods ended:
		Fiscal Year Ended
		December 28,			December 29,			December 30,
		2014			2013			2012
	Numerator:
	Income (loss) from continuing operations	$	(26,445	)	$	3,759		$	6,926
	Income (loss) from discontinued operations	(818		)	(627		)	5,697
	Net income (loss)	$	(27,263	)	$	3,132		$	12,623
	Denominator:
	Weighted average shares for basic income (loss) per share	3,350			3,231			3,174
	Add dilutive effect of stock options outstanding	—			108			64
	Weighted average shares for diluted income per share	3,350			3,339			3,238
	Income (loss) per share - basic:
	Income (loss) per share from continuing operations	$	(7.89	)	$	1.16		$	2.18
	Income (loss) per share from discontinued operations	$	(0.24	)	$	(0.19	)	$	1.79
	Net income (loss) per share - basic	$	(8.13	)	$	0.97		$	3.97
	Income (loss) per share - diluted:
	Income (loss) per share from continuing operations	$	(7.89	)	$	1.13		$	2.14
	Income (loss) per share from discontinued operations	$	(0.24	)	$	(0.19	)	$	1.76
	Net income (loss) per share - diluted	$	(8.13	)	$	0.94		$	3.9

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 28, 2014
Income Tax Disclosure [Abstract]
Provision for income taxes related to continuing operations	The Company’s provision for income taxes, all of which relates to its continuing operations, consists of the following:
		Fiscal Year Ended
	For the period ended	December 28,			December 29,				December 30,
		2014			2013				2012
	Current
	Federal	$	—		$	—			$	—
	State	—			—				45
	Foreign	22			87				101
	Deferred
	Federal	673			926				955
	State and foreign	20			3				(5		)
	Provision for income taxes	$	715		$	1,016			$	1,096
Reconciliation of the Company's effective tax rate	A reconciliation of the Company's effective tax rate for continuing operations to the statutory Federal tax rate follows:
		Fiscal Year Ended
		December 28,						December 29,						December 30,
		2014						2013						2012
		Amount			%			Amount				%		Amount			%
	Provision (benefit) computed at the statutory rate	$	(9,005	)	35			$	1,670			35		$	2,808		35
	Valuation allowance	9,082			(35.2	)		(1,576		)		(33.0	)	(2,607		)	(32.1	)
	Intangible amortization	673			(2.6	)		954				20		955			11.9
	Foreign tax rate differential	(35		)	0.1			(32		)		(0.7	)	(60		)	(0.8	)
	Total provision for income taxes	$	715		(2.7	)		$	1,016			21.3		$	1,096		14
Components of deferred tax assets and liabilities	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes.     Significant components of the Company's deferred tax liabilities and assets as of December 28, 2014, and December 29, 2013, follow:
		December 28,			December 29,
		2014			2013
	Deferred tax liabilities
	Depreciation and amortization (including differences in the basis of acquired assets)	$	(9,798	)	$	(9,125	)
	Total deferred tax liabilities	(9,798		)	(9,125		)
	Deferred tax assets
	Inventory and other reserves	2,428			2,329
	Pension benefit obligation	63,466			85,533
	Net operating loss and capital loss carryforwards	93,953			88,784
	Total gross deferred tax assets	159,847			176,646
	Less valuation allowance	(159,795		)	(176,568		)
	Deferred tax assets less valuation allowance	52			78
	Net deferred tax liability	$	(9,746	)	$	(9,047	)

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 28, 2014
Commitments and Contingencies Disclosure [Abstract]
Future minimum rental payments under noncancellable operating leases	Future minimum rental payments under noncancellable operating leases as of December 28, 2014, follow:
		Minimum
		Lease
	Fiscal Year	Payments
	2015	1,254
	2016	1,044
	2017	862
	2018	850
	2019	855
	Thereafter	1,116
	Total lease payments	5,981

StockBased_Compensation_Agreem1

Stock-Based Compensation Agreements (Tables)	12 Months Ended
	Dec. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Valuation assumptions for stock option grants	Following is a table of the weighted average fair value of the Company’s stock option grants for fiscal years 2014, 2013, and 2012 using the Black-Scholes valuation model, assuming no dividends, with the following assumptions:
		Fiscal Year Ended
		December 28, 2014				December 29, 2013				December 30, 2012
	Expected life in years	6.5				5.8				5.3
	Expected stock price volatility	66.4		%		70.9		%		74.9		%
	Risk-free interest rate	2		%		2		%		0.8		%
	Options granted (in thousands)	3				6				15
	Weighted average fair value of options granted	$	23.94			$	14.03			$	6.47
Outstanding stock option activity	A summary of certain information with respect to outstanding stock options under the Plans follows (options in thousands):
		Options			Weighted-				Aggregate
					Average				Intrinsic
					Exercise				Value
					Price				($000's)
	Options outstanding, January 1, 2012	179			$	32.67			$	1
	Granted	15			$	10.41
	Exercised	—			$	—
	Canceled	(20	)		$	65.26
	Options outstanding, December 30, 2012	174			$	26.88			$	18
	Granted	6			$	22.23
	Exercised	(8	)		$	12.06
	Canceled	(25	)		$	22.67
	Options outstanding, December 29, 2013	147			$	28.22			$	624
	Granted	3			$	38
	Exercised	—			$	—
	Canceled	(22	)		$	68.82
	Options outstanding, December 28, 2014	128			$	21.39			$	2,209
	Exercisable options, January 1, 2012	112			$	43.42			$	—
	Exercisable options, December 30, 2012	115			$	34.91			$	9
	Exercisable options, December 29, 2013	132			$	29.87			$	486
	Exercisable options, December 28, 2014	119			$	20.89			$	2,119
Shares exercisable and outstanding by excercise price range	The following table provides information regarding exercisable and outstanding options as of December 28, 2014 (options in thousands):
		Exercisable									Outstanding
	Range of exercise price per share	Options			Weighted				Weighted		Options		Weighted		Weighted
		exercisable			average				average		outstanding		average		average
					exercise				remaining				exercise		remaining
					price per				contractual				price per		contractual
					share				life (years)				share		life (years)
	$8.48 - $10.00	8			$	8.48			7		8		$	8.48	7
	$10.01 - $15.00	38			11.27				6.3		38		11.26		6.3
	$15.01 - $20.00	7			17.79				6.5		7		17.79		6.5
	$20.01 - $30.00	45			22.68				3.7		51		22.63		4.3
	$30.01 - $53.10	21			39.82				2.9		24		39.57		3.9
	Total	119			$	20.89			4.8		128		$	21.39	5.1
Unvested restricted stock units activity	The following table provides information regarding vested and unvested restricted stock activity for fiscal years 2012, 2013, and 2014 (shares in thousands):
		Shares			Weighted				Fair value
					average				of vested
					grant date				shares at
					fair value				vesting date
	Unvested at January 1, 2012	112			$	13.48
	Granted	46			$	16.66
	Vested	(42	)		$	14.85			$	437
	Forfeited	(11	)		$	13.38
	Unvested at December 30, 2012	105			$	14.35
	Granted	66			$	12.6
	Vested	(37	)		$	12.28			$	618
	Forfeited	(3	)		$	11.5
	Unvested at December 29, 2013	131			$	14.11
	Granted	41			$	19.09
	Vested	(21	)		$	13.66			$	587
	Forfeited	—			—
	Unvested at December 28, 2014	151			$	15.54
	Included in the table above are 35 thousand performance-based awards granted in the period ended December 29, 2013, that are not expected to vest as the performance target is unlikely to be achieved.

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 28, 2014
Compensation and Retirement Disclosure [Abstract]
Pension Expense Related to the Defined Benefit Pension Plan	Net pension expense for the Company’s pension plan follows:
			Fiscal Year Ended
			28-Dec-14			29-Dec-13			30-Dec-12
	Interest cost		$	8,766		$	7,854		$	8,655
	Expected return on plan assets		(12,435		)	(10,246		)	(9,741		)
	Recognized net actuarial loss		44,018			8,757			8,022
	Net pension expense		$	40,349		$	6,365		$	6,936
Changes in Benefit Obligations, Plan Assets, and Plan Funded Status	Pension benefit obligations at year-end, the fair value of pension plan assets, and the pension plan funded status are as follows:
			December 28, 2014			December 29, 2013
	Change in Benefit Obligation:
	Benefit obligation at beginning of period		$	209,064		$	230,257
	Interest cost		8,766			7,854
	Actuarial loss (gain)		12,006			(17,762		)
	Settlements		(47,830		)	—
	Benefits paid		(12,337		)	(11,285		)
	Benefit obligation at end of period		$	169,669		$	209,064
	Change in Plan Assets:
	Fair value of plan assets at beginning of period		$	160,603		$	127,917
	Actual return on plan assets		14,563			19,115
	Employer contributions		26,428			24,856
	Settlements		(46,948		)	—
	Benefits paid		(12,337		)	(11,285		)
	Fair value of plan assets at end of period		$	142,309		$	160,603
	Funded status		$	(27,360	)	$	(48,461	)
	Unrecognized net actuarial loss		134,048			169,070
	Net amount recognized		$	106,688		$	120,609
	Amounts Recognized in Statement of Financial Position:
	Pension benefit obligations, net		$	(27,360	)	$	(48,461	)
	Accumulated other comprehensive loss		134,048			169,070
	Net amount recognized		$	106,688		$	120,609
Schedule of Weighted Average Assumptions Used	Weighted average assumptions used to determine benefit cost and benefit obligation for the pension plan follow:
			Fiscal Year Ended
			December 28, 2014		December 29, 2013	30-Dec-12
	Discount rate used to determine benefit obligation		3.55%		4.45%	3.50%
	Discount rate used to determine benefit cost		4.45%		3.50%	4.05%
	Expected return on plan assets		7.75%		7.75%	8.25%
	Measurement date for pension benefit obligations		December 28, 2014		December 29, 2013	December 30, 2012
Schedule of Asset Allocations and Fair Values of Pension Plan Assets	The asset allocation targets per the Company's most recently adopted investment policy statement are as follows:
	Asset Class	Target Allocation
	Equity	40% to 70%
	Fixed income	15% to 50%
	Alternative investments	0% to 10%
	Cash	0% to 10%
Reconciliation of Changes in Fair Value of Plan Assets	The fair values of pension plan assets as of December 29, 2013, follows:
			Balance as of			Quoted Prices			Significant			Significant
						in Active Markets			Other Observable			Unobservable
						for Identical Assets			Inputs			Inputs
	Pension Plan Assets		December 29, 2013			(Level 1)			(Level 2)			(Level 3)
	Cash and cash equivalents		$	3		$	3		$	—		$	—
	Equity holdings:
	U.S. large cap		21,273			21,273			—			—
	U.S. small cap		7,216			7,216			—			—
	U.S. blended cap		27,794			27,794			—			—
	International equity		34,503			34,503			—			—
	Total equity holdings		90,786			90,786			—			—
	Fixed income holdings:
	Core fixed income		13,654			—			13,654			—
	Diversified short term debt		9,732			—			9,732			—
	Emerging market debt		7,942			—			7,942			—
	High yield debt		2,517			—			2,517			—
	Total fixed income holdings		33,845			—			33,845			—
	Multi asset class holdings		15,032			—			15,032			—
	Limited partnership holdings		20,937			—			20,937			—
	Total pension plan assets		$	160,603		$	90,789		$	69,814		$	—
	The fair values of pension plan assets as of December 28, 2014, follows:
			Balance as of			Quoted Prices			Significant			Significant
						in Active Markets			Other Observable			Unobservable
						for Identical Assets			Inputs			Inputs
	Pension Plan Assets		December 28, 2014			(Level 1)			(Level 2)			(Level 3)
	Cash and cash equivalents		$	387		$	387		$	—		$	—
	Equity holdings:
	U.S. large cap		19,210			19,210			—			—
	U.S. small cap		12,461			12,461			—			—
	U.S. blended cap		22,946			22,946			—			—
	International equity		27,604			27,604			—			—
	Total equity holdings		82,221			82,221			—			—
	Fixed income holdings:
	Core fixed income		26,851			—			26,851			—
	Diversified short term debt		3,535			—			3,535			—
	Emerging market debt		4,795			—			4,795			—
	High yield debt		3,626			—			3,626			—
	Total fixed income holdings		38,807			—			38,807			—
	Multi asset class holdings		4,521			—			4,521			—
	Limited partnership holdings		16,373			—			16,373			—
	Total pension plan assets		$	142,309		$	82,608		$	59,701		$	—
Expected Future Benefit Payments	Expected future benefit payments under the pension plan by fiscal year are as follows:
	Fiscal		Benefit
	Year		Payment
	2015		$	12,557
	2016		12,372
	2017		12,237
	2018		12,001
	2019		11,817
	2020-2024		55,101

Warranties_Tables

Warranties (Tables)	12 Months Ended
	Dec. 28, 2014
Product Warranties Disclosures [Abstract]
Changes in the warranty reserve	Changes in the warranty reserve for fiscal years 2014 and 2013 follow:
		December 28,			December 29,
		2014			2013
	Balance at beginning of period	$	379		$	370
	Amounts charged to earnings, net	377			603
	Use of reserve for warranty obligations	(401		)	(594		)
	Balance at end of period	$	355		$	379

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 28, 2014
Supplemental Cash Flow Elements [Abstract]
Changes in operating assets and liabilities	Changes in operating assets and liabilities of continuing operations follow:
		Fiscal Year Ended
	Fiscal period ended	December 28,			December 29,			December 30,
		2014			2013			2012
	(Increase) decrease in accounts receivable	$	(1,875	)	$	733		$	906
	(Increase) decrease in inventories	(304		)	1,546			(1,163		)
	(Increase) decrease in prepaid expenses and other current assets	13			(104		)	222
	(Increase) decrease in other assets	310			747			226
	Increase (decrease) in accounts payable	(28		)	(1,559		)	(1,339		)
	Increase (decrease) in accrued liabilities	1,897			(915		)	(317		)
	Increase (decrease) in operating assets and liabilities	$	13		$	448		$	(1,465	)
	Cash paid for interest and income taxes :
	Interest	$	—		$	—		$	—
	Income taxes	$	18		$	57		$	210

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 28, 2014
Payables and Accruals [Abstract]
Schedule of Accrued Liabilities	Accrued liabilities consist of the following:
		December 28,		December 29,
		2014		2013
	Salaries, wages, and incentive compensation	$	2,679	$	598
	Commissions	771		612
	Customer deposits	725		758
	Environmental	706		708
	Warranty	355		379
	All other	1,467		1,778
	Total accrued liabilities	$	6,703	$	4,833

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 28, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of accumulated other comprehensive loss	Amounts reclassified to net income in the table below represent the amortization of actuarial losses related to the Company's pension plan and are included in pension expense in the accompanying consolidated statements of operations.
								Accumulated
		Defined			Foreign			Other
		Benefit			Currency			Comprehensive
		Pension			Translation			Income
		Plan			Adjustments			(Loss)
	Balance, January 1, 2012	$	(178,592	)	$	739		$	(177,853	)
	Other comprehensive income (loss):
	Income (loss) before reclassifications	(16,889		)	132			(16,757		)
	Amounts reclassified to net income	8,022			—			8,022
	Total other comprehensive income (loss)	(8,867		)	132			(8,735		)
	Balance, December 30, 2012	(187,459		)	871			(186,588		)
	Other comprehensive income (loss):
	Income (loss) before reclassifications	26,632			(284		)	26,348
	Amounts reclassified to net income	8,757			—			8,757
	Total other comprehensive income (loss)	35,389			(284		)	35,105
	Balance, December 29, 2013	(152,070		)	587			(151,483		)
	Other comprehensive income (loss):
	Income (loss) before reclassifications	(8,996		)	(421		)	(9,417		)
	Amounts reclassified to net income	44,018			—			44,018
	Total other comprehensive income (loss)	35,022			(421		)	34,601
	Balance, December 28, 2014	$	(117,048	)	$	166		$	(116,882	)

Business_Segment_and_Geographi1

Business Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 28, 2014
Segment Reporting [Abstract]
Information of Company's foreign subsidiaries	Information with respect to the Company's foreign subsidiaries follows:
		Fiscal Year Ended
		December 28,		December 29,		December 30,
		2014		2013		2012
	Sales	$	6,490	$	6,694	$	7,164
	Income from operations	205		368		447
	Identifiable assets	6,455		7,882		6,553
	Capital expenditures	20		36		—
	Depreciation and amortization	19		31		26

Quarterly_Results_Tables

Quarterly Results (Tables)	12 Months Ended
	Dec. 28, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Results (unaudited)	The supplementary financial information presented below provides quarterly financial data for fiscal year 2014 and for fiscal year 2013.
	Fiscal 2014 quarter ended	March 30,			June 29,			September 28,			December 28,
		2014			2014			2014			2014
	Net sales	$	24,113		$	27,009		$	29,576		$	29,015
	Gross profit	8,152			9,715			10,927			11,157
	Income (loss) from operations	1,438			2,750			3,340			(33,258		)
	Income (loss) from continuing operations before income taxes	1,438			2,750			3,340			(33,258		)
	Provision for income taxes	240			240			131			104
	Income (loss) from continuing operations	1,198			2,510			3,209			(33,362		)
	Income (loss) from discontinued operations	(144		)	(213		)	—			(461		)
	Net income (loss)	$	1,054		$	2,297		$	3,209		$	(33,823	)
	Earnings per common share - basic:
	Income (loss) from continuing operations	$	0.37		$	0.77		$	0.96		$	(9.44	)
	Income (loss) from discontinued operations	$	(0.05	)	$	(0.07	)	$	—		$	(0.13	)
	Net income (loss)	$	0.32		$	0.7		$	0.96		$	(9.57	)
	Earnings per common share - diluted:
	Income (loss) from continuing operations	$	0.35		$	0.74		$	0.88		$	(9.44	)
	Income (loss) from discontinued operations	$	(0.04	)	$	(0.06	)	$	—		$	(0.13	)
	Net income (loss)	$	0.31		$	0.68		$	0.88		$	(9.57	)
	Fiscal 2013 quarter ended	March 31,			June 30,			September 29,			December 29,
		2013			2013			2013			2013
	Net sales	$	25,059		$	27,006		$	26,011		$	25,240
	Gross profit	8,142			9,343			9,175			8,665
	Income (loss) from operations	806			1,473			1,545			951
	Income (loss) from continuing operations before income taxes	806			1,473			1,545			951
	Provision for income taxes	261			280			262			213
	Income (loss) from continuing operations	545			1,193			1,283			738
	Income (loss) from discontinued operations	(73		)	(28		)	(161		)	(365		)
	Net income (loss)	$	472		$	1,165		$	1,122		$	373
	Earnings per common share - basic:
	Income (loss) from continuing operations	$	0.17		$	0.37		$	0.4		$	0.23
	Income (loss) from discontinued operations	$	(0.02	)	$	(0.01	)	$	(0.05	)	$	(0.11	)
	Net income (loss)	$	0.15		$	0.36		$	0.35		$	0.12
	Earnings per common share - diluted:
	Income (loss) from continuing operations	$	0.16		$	0.36		$	0.38		$	0.22
	Income (loss) from discontinued operations	$	(0.02	)	$	(0.01	)	$	(0.04	)	$	(0.11	)
	Net income (loss)	$	0.14		$	0.35		$	0.34		$	0.11

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Significant Accounting Policies [Line Items]
Fiscal Period Duration	364 days	364 days	364 days
Restricted cash	$262,000	$262,000
Impairment of goodwill	0	0	0
Tax benefit recorded on stock compensation expense	0	0	0
Research and development expense	3,174,000	3,246,000	3,834,000
Advertising expense	22,000	58,000	88,000
Patents [Member]
Significant Accounting Policies [Line Items]
Gross cost of patents	533,000	533,000
Estimated useful life of patents	10 years
Accumulated amortization of patents	344,000	291,000
Net carrying value of patents	$189,000	$242,000
Machinery and Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	5 years
Machinery and Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	10 years
Buildings and Leasehold Improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	10 years
Buildings and Leasehold Improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	40 years

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Discontinued Operations [Line Items]
Income (loss) from discontinued operations before interest and income taxes									($818)	($627)	$703
Income on sale of telecom power systems business									0	0	32
Gain from settlement agreement, net of fees									0	0	4,962
Income (loss) from discontinued operations, net of tax	-461	0	-213	-144	-365	-161	-28	-73	-818	-627	5,697
Environmental Charges [Member]
Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax									-400	-300
Legal Fees Related to Abestos Issues [Member]
Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax									200
Legal Fees and Other [Member]
Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax										-200	-500
Legal Settlement [Member]
Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax											5,000
Non-Cash Adjustments for Liabilities [Member]
Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax											$1,200

Goodwill_Details

Goodwill (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013
Goodwill [Roll Forward]
Goodwill, balance at beginning of year	$30,427	$30,485
Currency translation	-63	-58
Goodwill, balance at end of year	$30,364	$30,427

Inventories_Details

Inventories (Details) (USD $)	Dec. 28, 2014	Dec. 29, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$8,710	$8,531
Work in process	1,252	1,344
Finished goods	3,664	3,447
Total inventory	$13,626	$13,322

Bank_Borrowing_Arrangements_De

Bank Borrowing Arrangements (Details) (Revolving Credit Facility [Member], USD $)	1 Months Ended
	Nov. 30, 2007	Dec. 28, 2014	Jun. 15, 2014
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Borrowing capacity on revolving credit facility	$10,000,000	$12,500,000	$12,500,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	1.50%
Amount outstanding		$0

Earnings_Loss_Per_Share_Reconc

Earnings (Loss) Per Share (Reconciliation) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Numerator:
Income (loss) from continuing operations	($33,362)	$3,209	$2,510	$1,198	$738	$1,283	$1,193	$545	($26,445)	$3,759	$6,926
Income (loss) from discontinued operations	-461	0	-213	-144	-365	-161	-28	-73	-818	-627	5,697
Net income (loss)	($33,823)	$3,209	$2,297	$1,054	$373	$1,122	$1,165	$472	($27,263)	$3,132	$12,623
Denominator:
Weighted average shares for basic income (loss) per share									3,350	3,231	3,174
Add dilutive effect of stock options outstanding									0	108	64
Weighted average shares for diluted income per share									3,350	3,339	3,238
Income (loss) per share - basic:
Continuing operations (in dollars per share)	($9.44)	$0.96	$0.77	$0.37	$0.23	$0.40	$0.37	$0.17	($7.89)	$1.16	$2.18
Discontinued operations (in dollars per share)	($0.13)	$0	($0.07)	($0.05)	($0.11)	($0.05)	($0.01)	($0.02)	($0.24)	($0.19)	$1.79
Net income (loss) (USD per share)	($9.57)	$0.96	$0.70	$0.32	$0.12	$0.35	$0.36	$0.15	($8.13)	$0.97	$3.97
Income (loss) per share - diluted:
Continuing operations (in dollars per share)	($9.44)	$0.88	$0.74	$0.35	$0.22	$0.38	$0.36	$0.16	($7.89)	$1.13	$2.14
Discontinued operations (in dollars per share)	($0.13)	$0	($0.06)	($0.04)	($0.11)	($0.04)	($0.01)	($0.02)	($0.24)	($0.19)	$1.76
Net income (loss) (USD per share)	($9.57)	$0.88	$0.68	$0.31	$0.11	$0.34	$0.35	$0.14	($8.13)	$0.94	$3.90

Earnings_Loss_Per_Share_Antidi

Earnings (Loss) Per Share (Antidilutive Securities) (Details)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	116
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	104	147	174

Fair_Values_of_Financial_Instr1

Fair Values of Financial Instruments (Details) (Quoted Market Prices [Member], USD $)	Dec. 28, 2014	Dec. 29, 2013
In Millions, unless otherwise specified
Quoted Market Prices [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in annuity contract, fair value	$3.60	$3.90

Asset_Impairment_Charges_Detai

Asset Impairment Charges (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2014
Property, Plant and Equipment Impairment or Disposal [Abstract]
Impairment charge for fixed assets	$1.20

Income_Taxes_Provision_for_Inc

Income Taxes (Provision for Income Taxes) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Current
Federal									$0	$0	$0
State									0	0	45
Foreign									22	87	101
Deferred
Federal									673	926	955
State and foreign									20	3	-5
Provision for income taxes	$104	$131	$240	$240	$213	$262	$280	$261	$715	$1,016	$1,096

Income_Taxes_Effective_Income_

Income Taxes (Effective Income Tax Rate Reconciliation) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Income Tax Expense (Benefit), Tax Reconciliation
Provision (benefit) computed at the statutory rate									($9,005)	$1,670	$2,808
Valuation Allowance									9,082	-1,576	-2,607
Intangible Amortization									673	954	955
Foreign tax rate differential									-35	-32	-60
Provision for income taxes	$104	$131	$240	$240	$213	$262	$280	$261	$715	$1,016	$1,096
Effective Income Tax Rate Reconciliation
Provision (benefit) computed at the statutory rate (percent)									35.00%	35.00%	35.00%
Valuation Allowance (percent)									-35.20%	-33.00%	-32.10%
Intangible Amortization (percent)									-2.60%	20.00%	11.90%
Foreign tax rate differential (percent)									0.10%	-0.70%	-0.80%
Total provision for income taxes (percent)									-2.70%	21.30%	14.00%

Income_Taxes_Deferred_Tax_Asse

Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 28, 2014	Dec. 29, 2013
In Thousands, unless otherwise specified
Deferred tax liabilities
Depreciation and amortization (including differences in the basis of acquired assets)	($9,798)	($9,125)
Total deferred tax liabilities	-9,798	-9,125
Deferred tax assets
Inventory and other reserves	2,428	2,329
Pension benefit obligation	63,466	85,533
Net operating loss and capital loss carryforwards	93,953	88,784
Total gross deferred tax assets	159,847	176,646
Less valuation allowance	-159,795	-176,568
Deferred tax assets less valuation allowance	52	78
Net deferred tax liability	($9,746)	($9,047)

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Income Tax Disclosure [Abstract]
Income before provision for income taxes, foreign subsidiaries	$221,000	$368,000	$447,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$242,000,000	$227,000,000
Federal [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Carryforward period	20 years

Commitments_and_Contingencies_1

Commitments and Contingencies (Leases) (Details) (USD $)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$1,254,000
2016	1,044,000
2017	862,000
2018	850,000
2019	855,000
Thereafter	1,116,000
Total lease payments	5,981,000
Rent expense	$1,400,000	$1,300,000	$1,100,000

Commitments_and_Contingencies_2

Commitments and Contingencies (Litigation) (Details)

Dec. 28, 2014

Aug. 02, 2012

Aug. 02, 2012

Nov. 30, 2010

Nov. 30, 2010

Nov. 30, 2007

Nov. 30, 2007

Dec. 28, 2014

Aug. 31, 2008

Dec. 28, 2014

Jan. 31, 2012

Aug. 31, 2008

In Millions, unless otherwise specified

USD ($)

Italy Tax Authority [Member]

Italy Tax Authority [Member]

Italy Tax Authority [Member]

Italy Tax Authority [Member]

Antonio Canova [Member]

Antonio Canova [Member]

Connecticut Department of Environmental Protection [Member]

Ole K. Nilssen v. Magnetek, Inc. [Member]

Ole K. Nilssen v. Magnetek, Inc. [Member]

Kirkland and Ellis, LLP v. Magnetek, Inc. [Member]

Kirkland and Ellis, LLP v. Magnetek, Inc. [Member]

USD ($)

EUR (€)

USD ($)

EUR (€)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Loss Contingencies [Line Items]

Litigation settlement, amount

$23.40

Damages paid

18.75

Damages awarded

5

Asserted claims for damages

4.3

3.5

18.75

Estimate of possible loss

11.6

9.5

2.3

1.9

Alleged taxes owed including penalties and interest

3.4

2.8

3.2

2.6

Potential penalties rate, including interest

120.00%

120.00%

Liabilitiy recorded

0.4

Outstanding letters of credit

$0.80

StockBased_Compensation_Agreem2

Stock-Based Compensation Agreements (Black-Scholes Fair Value Assumptions) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life in years	6 years 6 months	5 years 9 months 18 days	5 years 3 months 18 days
Expected stock price volatility	66.40%	70.90%	74.90%
Risk-free interest rate	2.00%	2.00%	0.80%
Options granted (in thousands)	3	6	15
Weighted average fair value of options granted	$23.94	$14.03	$6.47

StockBased_Compensation_Agreem3

Stock-Based Compensation Agreements (Summary of Stock Option Activity) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Options, Outstanding [Roll Forward]
Options outstanding, beginning balance	147	174	179
Granted	3	6	15
Exercised	0	-8	0
Canceled	-22	-25	-20
Options outstanding, ending balance	128	147	174
Exercisable options	119	132	115	112
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding, weighted average exercise price, beginning balance	$28.22	$26.88	$32.67
Options granted, weighted average exercise price	$38	$22.23	$10.41
Options exercised, weighted average exercise price	$0	$12.06	$0
Options canceled, weighted average exercise price	$68.82	$22.67	$65.26
Options outstanding, weighted average exercise price, ending balance	$21.39	$28.22	$26.88
Options exercisable, weighted average exercise price	$20.89	$29.87	$34.91	$43.42
Options outstanding, aggregate intrinsic value	$2,209	$624	$18	$1
Options exercisable, aggregate intrinsic value	$2,119	$486	$9	$0

StockBased_Compensation_Agreem4

Stock-Based Compensation Agreements (Exercisable and Outstanding Options) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options exercisable (in shares)	119	132	115	112
Options exercisable, weighted average exercise price per share	$20.89	$29.87	$34.91	$43.42
Options exercisable, weighted average remaining contractual term	4 years 9 months 18 days
Options outstanding (in shares)	128	147	174	179
Options outstanding, weighted average exercise price per share	$21.39	$28.22	$26.88	$32.67
Options outstanding, weighted average remaining contractual term	5 years 1 month 6 days
$8.48 - $10.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$8.48
Exercise price range, upper limit	$10
Options exercisable (in shares)	8
Options exercisable, weighted average exercise price per share	$8.48
Options exercisable, weighted average remaining contractual term	7 years
Options outstanding (in shares)	8
Options outstanding, weighted average exercise price per share	$8.48
Options outstanding, weighted average remaining contractual term	7 years
$10.01 - $15.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$10.01
Exercise price range, upper limit	$15
Options exercisable (in shares)	38
Options exercisable, weighted average exercise price per share	$11.27
Options exercisable, weighted average remaining contractual term	6 years 3 months 18 days
Options outstanding (in shares)	38
Options outstanding, weighted average exercise price per share	$11.26
Options outstanding, weighted average remaining contractual term	6 years 3 months 18 days
$15.01 - $20.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$15.01
Exercise price range, upper limit	$20
Options exercisable (in shares)	7
Options exercisable, weighted average exercise price per share	$17.79
Options exercisable, weighted average remaining contractual term	6 years 6 months
Options outstanding (in shares)	7
Options outstanding, weighted average exercise price per share	$17.79
Options outstanding, weighted average remaining contractual term	6 years 6 months
$20.01 - $30.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$20.01
Exercise price range, upper limit	$30
Options exercisable (in shares)	45
Options exercisable, weighted average exercise price per share	$22.68
Options exercisable, weighted average remaining contractual term	3 years 8 months 12 days
Options outstanding (in shares)	51
Options outstanding, weighted average exercise price per share	$22.63
Options outstanding, weighted average remaining contractual term	4 years 3 months 18 days
$30.01 - $80.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$30.01
Exercise price range, upper limit	$80
Options exercisable (in shares)	21
Options exercisable, weighted average exercise price per share	$39.82
Options exercisable, weighted average remaining contractual term	2 years 10 months 24 days
Options outstanding (in shares)	24
Options outstanding, weighted average exercise price per share	$39.57
Options outstanding, weighted average remaining contractual term	3 years 10 months 24 days

StockBased_Compensation_Agreem5

Stock-Based Compensation Agreements (Vested and Unvested Restricted Stock Unit Activity) (Details) (Restricted Stock [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Restricted Stock [Member]
Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, beginning balance	131	105	112
Shares granted	41	66	46
Shares vested	-21	-37	-42
Shares forfeited	0	-3	-11
Shares, ending balance	151	131	105
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average grant date fair value, beginnig balance	$14.11	$14.35	$13.48
Weighted average grant date fair value, granted	$19.09	$12.60	$16.66
Weighted average grant date fair value, vested	$13.66	$12.28	$14.85
Weighted average grant date fair value, forfeited	$0	$11.50	$13.38
Weighted average grant date fair value, ending balance	$15.54	$14.11	$14.35
Fair value of vested shares at vesting date, vested	$587	$618	$437

StockBased_Compensation_Agreem6

Stock-Based Compensation Agreements (Details) (USD $)	12 Months Ended
Share data in Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	236
Maximum term of options granted	10 years
Award service period	3 years
Share-based compensation expense recognized	$599,000	$676,000	$824,000
Total unrecognized compensation cost	$800,000
Unrecognized stock-based compensation expense, weighted-average remaining period for recognition	1 year 9 months 18 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		35

Employee_Benefit_Plans_Defined

Employee Benefit Plans (Defined Benefit Plans) (Details) (USD $)	1 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	Feb. 28, 2015
		participant
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Number of Employees Covered		2,970
Defined Benefit Plan, Number of Covered Employees Electing Lump Sum Option		2,230
Defined Benefit Plan, Number of Covered Employees Electing Lump Sum Option, Percent		75.00%
Defined Benefit Plan, Benefits Paid		$46,900,000
Defined Benefit Plan, Settlements, Benefit Obligation		37,100,000
Pension expense		40,349,000	6,365,000	6,936,000
Estimated future pension expense		2,000,000
Amounts from AOCI to be reocgnized in net periodic benefit cost in next fiscal year		6,700,000
Expected long-term rate of return on pension plan		7.75%
Future minimum required contributions		25,000,000
Net present value of future employer contributions		19,900,000
Defined Benefit, Minimum Required Contribution		19,100,000
Defined Benefit Plan, Discretionary Contribution by Employer, Shares	250,000
Defined Benefit Plan, Discretionary Contribution by Employer	7,400,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		4.90%
Pro Forma [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense		3,200,000
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		142,309,000	160,603,000	127,917,000
Defined Benefit Plan, Benefits Paid		12,337,000	11,285,000
Defined Benefit Plan, Settlements, Benefit Obligation		47,830,000	0
Expected long-term rate of return on pension plan		7.75%	7.75%	8.25%
Unrecognized losses		134,048,000	169,070,000
Unrecognized losses, tax benefits			-17,000,000
Employer contributions		26,428,000	24,856,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.55%	4.45%	3.50%
U.S. Small Cap [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		12,461,000	7,216,000
U.S. Small Cap [Member] | Common Stock [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Number of Shares of Equity Securities Issued by Employer and Related Parties Included in Plan Assets		201,550
Equity Holdings [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		82,221,000	90,786,000
Limited Partnership Holdings [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		16,373,000	20,937,000
Level 1 [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		82,608,000	90,789,000
Level 1 [Member] | U.S. Small Cap [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		12,461,000	7,216,000
Level 1 [Member] | U.S. Small Cap [Member] | Common Stock [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		7,659,000
Level 1 [Member] | Equity Holdings [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		82,221,000	90,786,000
Level 1 [Member] | Limited Partnership Holdings [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		$0	$0
Subsequent Event [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Required Retention Percentage					10.00%
Subsequent Event [Member] | Equity Holdings [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations					59.00%
Subsequent Event [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations					42.00%
Subsequent Event [Member] | Limited Partnership Holdings [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations					1.00%

Employee_Benefit_Plans_Net_Per

Employee Benefit Plans (Net Periodic Pension Expense) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Net Periodic Benefit Cost [Abstract]
Interest cost	$8,766	$7,854	$8,655
Expected return on plan assets	-12,435	-10,246	-9,741
Recognized net actuarial losses	44,018	8,757	8,022
Total net pension expense	$40,349	$6,365	$6,936

Employee_Benefit_Plans_Pension

Employee Benefit Plans (Pension Plan Benefit Obligations, Plans Assets, and Funded Status) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Change in Benefit Obligation:
Interest cost	$8,766	$7,854	$8,655
Settlements	-37,100
Benefits paid	-46,900
Change in Plan Assets:
Benefits paid	-46,900
Pension benefit obligations, net	-27,360	-48,461
Pension Plan [Member]
Change in Benefit Obligation:
Benefit obligation at beginning of period	209,064	230,257
Interest cost	8,766	7,854
Actuarial loss (gain)	12,006	-17,762
Settlements	-47,830	0
Benefits paid	-12,337	-11,285
Benefit obligation at end of period	169,669	209,064
Change in Plan Assets:
Fair value balance, beginning of period	160,603	127,917
Actual return on plan assets	14,563	19,115
Employer contributions	26,428	24,856
Settlements	-46,948	0
Benefits paid	-12,337	-11,285
Fair value balance, end of period	142,309	160,603
Funded status	-27,360	-48,461
Unrecognized net actuarial loss	134,048	169,070
Prepaid benefit cost	106,688	120,609
Pension benefit obligations, net	-27,360	-48,461
Accumulatd other comprehensive loss	134,048	169,070
Net amount recognized	$106,688	$120,609

Employee_Benefit_Plans_Weighte

Employee Benefit Plans (Weighted Average Assumptions Used) (Details)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate used to determine benefit obligation	4.90%
Expected return on plan assets	7.75%
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate used to determine benefit obligation	3.55%	4.45%	3.50%
Discount rate used to determine benefit cost	4.45%	3.50%	4.05%
Expected return on plan assets	7.75%	7.75%	8.25%
Measurement date for pension benefit obligations	28-Dec-14	29-Dec-13	30-Dec-12

Employee_Benefit_Plans_Asset_T

Employee Benefit Plans (Asset Target Allocations) (Details) (Pension Plan [Member])	12 Months Ended
	Dec. 28, 2014
Equity [Member]
Asset Class, Target Allocations [Abstract]
Target plan asset allocations, minimum	40.00%
Target plan asset allocations, maximum	70.00%
Fixed income [Member]
Asset Class, Target Allocations [Abstract]
Target plan asset allocations, minimum	15.00%
Target plan asset allocations, maximum	50.00%
Alternative investments [Member]
Asset Class, Target Allocations [Abstract]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	10.00%
Cash [Member]
Asset Class, Target Allocations [Abstract]
Target plan asset allocations, minimum	0.00%
Target plan asset allocations, maximum	10.00%

Employee_Benefit_Plans_Fair_Va

Employee Benefit Plans (Fair Value of Pension Plans) (Details) (Pension Plan [Member], USD $)	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$142,309	$160,603	$127,917
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	82,608	90,789
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	59,701	69,814
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	387	3
Cash and Cash Equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	387	3
Cash and Cash Equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Cash and Cash Equivalents [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Equity Holdings [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	82,221	90,786
Equity Holdings [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	82,221	90,786
Equity Holdings [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Equity Holdings [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	19,210	21,273
U.S. Large Cap [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	19,210	21,273
U.S. Large Cap [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. Large Cap [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. Small Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	12,461	7,216
U.S. Small Cap [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	12,461	7,216
U.S. Small Cap [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. Small Cap [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. Blended Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	22,946	27,794
U.S. Blended Cap [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	22,946	27,794
U.S. Blended Cap [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
U.S. Blended Cap [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
International Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	27,604	34,503
International Equity [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	27,604	34,503
International Equity [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
International Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Fixed Income Holdings [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	38,807	33,845
Fixed Income Holdings [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Fixed Income Holdings [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	38,807	33,845
Fixed Income Holdings [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Core Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	26,851	13,654
Core Fixed Income [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Core Fixed Income [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	26,851	13,654
Core Fixed Income [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Diversified short term debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	3,535	9,732
Diversified short term debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Diversified short term debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	3,535	9,732
Diversified short term debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Emerging Market Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4,795	7,942
Emerging Market Debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Emerging Market Debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4,795	7,942
Emerging Market Debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
High yield debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	3,626	2,517
High yield debt [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
High yield debt [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	3,626	2,517
High yield debt [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Multi asset class holdings [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4,521	15,032
Multi asset class holdings [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Multi asset class holdings [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4,521	15,032
Multi asset class holdings [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Limited Partnership Holdings [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	16,373	20,937
Limited Partnership Holdings [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	0	0
Limited Partnership Holdings [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	16,373	20,937
Limited Partnership Holdings [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$0	$0

Employee_Benefit_Plans_Reconci

Employee Benefit Plans (Reconciliation to Fair Value of Pension Plans) (Details) (Pension Plan [Member], USD $)	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
In Thousands, unless otherwise specified
Change in Fair Value of Plan Assets
Fair value balance, beginning of period	$142,309	$160,603	$127,917
Fair value balance, end of period	142,309	160,603	127,917
Level 3 [Member]
Change in Fair Value of Plan Assets
Fair value balance, beginning of period	0	0
Fair value balance, end of period	$0	$0

Employee_Benefit_Plans_Expecte

Employee Benefit Plans (Expected Future Benefit Payments) (Details) (USD $)	Dec. 28, 2014
In Thousands, unless otherwise specified
Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2015	$12,557
2016	12,372
2017	12,237
2018	12,001
2019	11,817
2020-2024	$55,101

Employee_Benefit_Plans_Defined1

Employee Benefit Plans (Defined Contribution Plan) (Details) (401K [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
401K [Member]
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer contributions	$453	$444	$449

Warranties_Details

Warranties (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013
Product Warranties Disclosures [Abstract]
Warranty term, minimum	1 year
Warranty term, maximum	2 years
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$379	$370
Amounts charged to earnings, net	377	603
Use of reserve for warranty obligations	-401	-594
Balance at end of period	$355	$379

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Supplemental Cash Flow Elements [Abstract]
(Increase) decrease in accounts receivable	($1,875)	$733	$906
(Increase) decrease in inventories	-304	1,546	-1,163
(Increase) decrease in prepaid expenses and other current assets	13	-104	222
(Increase) decrease in other assets	310	747	226
Increase (decrease) in accounts payable	-28	-1,559	-1,339
Increase (decrease) in accrued liabilities	1,897	-915	-317
Increase (decrease) in operating assets and liabilities	13	448	-1,465
Cash paid (refunded) for interest	0	0	0
Cash paid (refunded) for income taxes	$18	$57	$210

Accrued_Liabilities_Details

Accrued Liabilities (Details) (USD $)	Dec. 28, 2014	Dec. 29, 2013
In Thousands, unless otherwise specified
Payables and Accruals [Abstract]
Salaries, wages, and incentive compensation	$2,679	$598
Commissions	771	612
Customer deposits	725	758
Environmental	706	708
Warranty	355	379
All other	1,467	1,778
Accrued liabilities	$6,703	$4,833

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
In Millions, unless otherwise specified
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Defined Benefit Pension and Other Postretirement Plans, Tax	$17	$17	$17

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Loss) (Changes In Components) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Balance, beginning of period	($151,483)	($186,588)	($177,853)
Income (loss) before reclassifications	-9,417	26,348	-16,757
Amounts reclassified to net income	44,018	8,757	8,022
Other Comprehensive Income (Loss), Net of Tax	34,601	35,105	-8,735
Balance, end of period	-116,882	-151,483	-186,588
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Balance, beginning of period	587	871	739
Income (loss) before reclassifications	-421	-284	132
Amounts reclassified to net income	0	0	0
Other Comprehensive Income (Loss), Net of Tax	-421	-284	132
Balance, end of period	166	587	871
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Balance, beginning of period	-152,070	-187,459	-178,592
Income (loss) before reclassifications	-8,996	26,632	-16,889
Amounts reclassified to net income	44,018	8,757	8,022
Other Comprehensive Income (Loss), Net of Tax	35,022	35,389	-8,867
Balance, end of period	($117,048)	($152,070)	($187,459)

Business_Segment_and_Geographi2

Business Segment and Geographic Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Segment Reporting Information [Line Items]
Income from operations	($33,258)	$3,340	$2,750	$1,438	$951	$1,545	$1,473	$806	($25,730)	$4,775	$8,022
Identifiable assets	78,700				81,969				78,700	81,969
Export sales from the United States									5,279	4,625	6,698
Foreign Subsidiary [Member]
Segment Reporting Information [Line Items]
Sales									6,490	6,694	7,164
Income from operations									205	368	447
Identifiable assets	6,455				7,882				6,455	7,882	6,553
Capital expenditures									20	36	0
Depreciation and amortization									$19	$31	$26
Total Revenue [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage									10.00%	10.00%	10.00%

Quarterly_Results_Details

Quarterly Results (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Quarterly Financial Information Disclosure [Abstract]
Net sales	$29,015	$29,576	$27,009	$24,113	$25,240	$26,011	$27,006	$25,059	$109,713	$103,316	$114,274
Gross profit	11,157	10,927	9,715	8,152	8,665	9,175	9,343	8,142	39,951	35,325	39,844
Income from operations	-33,258	3,340	2,750	1,438	951	1,545	1,473	806	-25,730	4,775	8,022
Income (loss) from continuing operations before income taxes	-33,258	3,340	2,750	1,438	951	1,545	1,473	806
Provision for income taxes	104	131	240	240	213	262	280	261	715	1,016	1,096
Income (loss) from continuing operations	-33,362	3,209	2,510	1,198	738	1,283	1,193	545	-26,445	3,759	6,926
Income (loss) from discontinued operations	-461	0	-213	-144	-365	-161	-28	-73	-818	-627	5,697
Net income (loss)	($33,823)	$3,209	$2,297	$1,054	$373	$1,122	$1,165	$472	($27,263)	$3,132	$12,623
Earnings (loss) per common share - basic
Income (loss) from continuing operations (USD per share)	($9.44)	$0.96	$0.77	$0.37	$0.23	$0.40	$0.37	$0.17	($7.89)	$1.16	$2.18
Income (loss) from discontinued operations (USD per share)	($0.13)	$0	($0.07)	($0.05)	($0.11)	($0.05)	($0.01)	($0.02)	($0.24)	($0.19)	$1.79
Net income (loss) (USD per share)	($9.57)	$0.96	$0.70	$0.32	$0.12	$0.35	$0.36	$0.15	($8.13)	$0.97	$3.97
Earnings (loss) per common share - diluted
Income (loss) from continuing operations (USD per share)	($9.44)	$0.88	$0.74	$0.35	$0.22	$0.38	$0.36	$0.16	($7.89)	$1.13	$2.14
Income (loss) from discontinued operations (USD per share)	($0.13)	$0	($0.06)	($0.04)	($0.11)	($0.04)	($0.01)	($0.02)	($0.24)	($0.19)	$1.76
Net income (loss) (USD per share)	($9.57)	$0.88	$0.68	$0.31	$0.11	$0.34	$0.35	$0.14	($8.13)	$0.94	$3.90

Valuation_and_Qualifying_Accou1

Valuation and Qualifying Accounts (Details) (Allowance for doubtful accounts [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$215	$219	$206
Additions charged (recoveries added) to earnings	39	13	13
Deductions from allowance	-48	-16	0
Other	0	-1	0
Balance at end of year	$206	$215	$219