SL Industries 10-Q 1 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 25, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'SLI	'
Entity Registrant Name	'SL INDUSTRIES INC	'
Entity Central Index Key	'0000089270	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Smaller Reporting Company	'
Entity Common Stock, Shares Outstanding	'	4,144,000

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
Current assets:	'	'
Cash and cash equivalents	$15,790,000	$7,163,000
Receivables, net	34,876,000	30,765,000
Inventories, net	23,076,000	22,963,000
Other current assets	1,988,000	7,168,000
Deferred income taxes, net	3,033,000	2,804,000
Total current assets	78,763,000	70,863,000
Property, plant and equipment, net	10,772,000	10,790,000
Deferred income taxes, net	9,367,000	10,239,000
Goodwill	17,670,000	17,666,000
Other intangible assets, net	2,298,000	2,346,000
Other assets and deferred charges, net	1,390,000	1,430,000
Total assets	120,260,000	113,334,000
Current liabilities:	'	'
Short-term borrowings and current portion of long-term debt	48,000	1,048,000
Accounts payable	19,996,000	17,112,000
Accrued income taxes	1,100,000	20,000
Accrued liabilities:	'	'
Payroll and related costs	4,457,000	5,373,000
Other	14,034,000	10,259,000
Total current liabilities	39,635,000	33,812,000
Long-term debt, less current maturities	164,000	187,000
Deferred compensation and supplemental retirement benefits	1,591,000	1,695,000
Other long-term liabilities	12,339,000	18,465,000
Total liabilities	53,729,000	54,159,000
Commitments and contingencies	'	'
SHAREHOLDERS' EQUITY	'	'
Preferred stock, no par value; authorized, 6,000,000 shares; none issued	'	'
Common stock, $.20 par value; authorized, 25,000,000 shares; issued, 6,656,000 and 6,656,000 shares, respectively	1,331,000	1,331,000
Capital in excess of par value	22,313,000	22,153,000
Retained earnings	68,575,000	60,520,000
Accumulated other comprehensive (loss) income, net of tax	-154,000	822,000
Treasury stock at cost, 2,512,000 and 2,530,000 shares, respectively	-25,534,000	-25,651,000
Total shareholders' equity	66,531,000	59,175,000
Total liabilities and shareholders' equity	$120,260,000	$113,334,000

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]	'	'
Preferred stock, par value	'	'
Preferred stock, shares authorized	6,000,000	6,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.20	$0.20
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	6,656,000	6,656,000
Treasury stock, shares	2,512,000	2,530,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]	'	'	'	'
Net sales	$56,749,000	$49,786,000	$109,334,000	$98,881,000
Cost and expenses:	'	'	'	'
Cost of products sold	36,686,000	32,764,000	71,863,000	64,963,000
Engineering and product development	3,097,000	3,672,000	6,395,000	7,175,000
Selling, general and administrative	9,555,000	9,104,000	18,179,000	17,911,000
Depreciation and amortization	636,000	615,000	1,250,000	1,215,000
Restructuring charges	'	'	463,000	'
Total cost and expenses	49,974,000	46,155,000	98,150,000	91,264,000
Income from operations	6,775,000	3,631,000	11,184,000	7,617,000
Other income (expense):	'	'	'	'
Amortization of deferred financing costs	-22,000	-20,000	-43,000	-39,000
Interest income	1,000	2,000	3,000	3,000
Interest expense	-8,000	-15,000	-43,000	-50,000
Other gain (loss), net	1,729,000	-301,000	1,479,000	-327,000
Income from continuing operations before income taxes	8,475,000	3,297,000	12,580,000	7,204,000
Income tax provision	2,820,000	1,045,000	4,260,000	1,968,000
Income from continuing operations	5,655,000	2,252,000	8,320,000	5,236,000
(Loss) from discontinued operations, net of tax	-127,000	-237,000	-265,000	-455,000
Net income	$5,528,000	$2,015,000	$8,055,000	$4,781,000
Basic net income (loss) per common share	'	'	'	'
Income from continuing operations	$1.37	$0.54	$2.01	$1.26
(Loss) from discontinued operations, net of tax	($0.03)	($0.06)	($0.06)	($0.11)
Net income	$1.34	$0.48	$1.95	$1.15
Diluted net income (loss) per common share	'	'	'	'
Income from continuing operations	$1.36	$0.54	$2	$1.25
(Loss) from discontinued operations, net of tax	($0.03)	($0.06)	($0.07)	($0.11)
Net income	$1.33	$0.48	$1.93	$1.14
Shares used in computing basic net income (loss) per common share	4,138,000	4,157,000	4,133,000	4,148,000
Shares used in computing diluted net income (loss) per common share	4,168,000	4,204,000	4,163,000	4,189,000

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net income	$5,528,000	$2,015,000	$8,055,000	$4,781,000
Other comprehensive income, net of tax:	'	'	'	'
Foreign currency translation	152,000	17,000	118,000	93,000
Net unrealized gain on available-for-sale securities	130,000	'	'	'
Net unrealized gain reclassified into income on sale of available-for-sale securities	-1,028,000	'	-1,094,000	'
Comprehensive income	$4,782,000	$2,032,000	$7,079,000	$4,874,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES:	'	'
Net income	$8,055,000	$4,781,000
Adjustment for losses from discontinued operations	265,000	455,000
Income from continuing operations	8,320,000	5,236,000
Adjustments to reconcile income from continuing operations to net cash provided by (used in) operating activities:	'	'
Depreciation	930,000	918,000
Amortization	320,000	297,000
Amortization of deferred financing costs	43,000	39,000
Stock-based compensation	334,000	332,000
Excess tax benefit on stock compensation	'	-35,000
Loss on foreign exchange contracts	221,000	327,000
(Recoveries of) provisions for losses on accounts receivable	-141,000	34,000
Deferred compensation and supplemental retirement benefits	151,000	132,000
Deferred compensation and supplemental retirement benefit payments	-249,000	-260,000
Deferred income taxes	643,000	70,000
(Gain) on sale of available-for-sale securities	-1,691,000	'
Changes in operating assets and liabilities:	'	'
Accounts receivable	-3,949,000	-1,820,000
Inventories	-136,000	-2,507,000
Other assets	1,716,000	-1,049,000
Accounts payable	2,912,000	-1,045,000
Other accrued liabilities	-967,000	335,000
Accrued income taxes	1,305,000	-383,000
Net cash provided by operating activities from continuing operations	9,762,000	621,000
Net cash (used in) operating activities from discontinued operations	-2,833,000	-2,934,000
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	6,929,000	-2,313,000
INVESTING ACTIVITIES:	'	'
Purchases of property, plant and equipment	-940,000	-1,801,000
Proceeds from sale of available-for-sale securities	4,054,000	'
Purchases of other assets	-264,000	-62,000
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	2,850,000	-1,863,000
FINANCING ACTIVITIES:	'	'
Proceeds from Senior Revolving Credit Facility	'	13,550,000
Payments of Senior Revolving Credit Facility	-1,000,000	-11,060,000
Payments of Capital Leases	-24,000	'
Payments of deferred financing costs	'	-30,000
Treasury stock purchases	-106,000	-792,000
Proceeds from stock options exercised	'	227,000
Excess tax benefit on stock compensation	'	35,000
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	-1,130,000	1,930,000
Effect of exchange rate changes on cash	-22,000	24,000
NET CHANGE IN CASH AND CASH EQUIVALENTS	8,627,000	-2,222,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	7,163,000	3,196,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD	15,790,000	974,000
Cash paid during the period for:	'	'
Interest	44,000	49,000
Income taxes	$1,754,000	$2,445,000

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	1. Basis Of Presentation
	The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X promulgated under the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, the accompanying financial statements contain all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation. Operating results for interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. These financial statements should be read in conjunction with the Company’s audited financial statements and notes thereon included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. Unless the context requires otherwise, the terms the “Company,” “SL Industries,” “we,” “us” and “our” mean SL Industries, Inc., a Delaware corporation, and its consolidated subsidiaries.

Receivables

Receivables	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Receivables	'
	2. Receivables
	Receivables consist of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	Trade receivables	$	34,482		$	30,766
	Less: allowance for doubtful accounts		(379	)		(581	)
	Trade receivables, net		34,103			30,185
	Recoverable income taxes		273			344
	Other		500			236
	Receivables, net	$	34,876		$	30,765

Inventories

Inventories	6 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	3. Inventories
	Inventories consist of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	Raw materials	$	16,988		$	16,198
	Work in process		4,669			4,842
	Finished goods		4,013			4,124
	Gross inventory		25,670			25,164
	Less: allowances		(2,594	)		(2,201	)
	Inventories, net	$	23,076		$	22,963

Income_Per_Share

Income Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Income Per Share	'
	4. Income Per Share
	The Company has presented net income (loss) per common share pursuant to Accounting Standards Codification (“ASC”) 260 “Earnings Per Share.” Basic net income (loss) per common share is computed by dividing reported net income (loss) available to common shareholders by the weighted-average number of shares outstanding for the period.
	Diluted net income (loss) per common share is computed by dividing reported net income (loss) available to common shareholders by the weighted-average shares outstanding for the period, adjusted for the dilutive effect of common stock equivalents, which consist of stock options, using the treasury stock method. For the three and six months ended June 30, 2014, 13,000 and 11,000 stock options were excluded from the dilutive computation, respectively, as the impact of their inclusion would have been anti-dilutive. There were no anti-dilutive options for the three and six months ended June 30, 2013.
	The table below sets forth the computation of basic and diluted net income (loss) per share:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(in thousands, except per share amounts)
	Basic net income available to common shareholders:
	Net income available to common shareholders from continuing operations	$	5,655		$	2,252		$	8,320		$	5,236
	Diluted net income available to common shareholders from continuing operations	$	5,655		$	2,252		$	8,320		$	5,236
	Shares:
	Basic weighted average number of common shares outstanding		4,138			4,157			4,133			4,148
	Common shares assumed upon exercise of stock options		30			47			30			41
	Diluted weighted average number of common shares outstanding		4,168			4,204			4,163			4,189
	Basic net income (loss) per common share:
	Income from continuing operations	$	1.37		$	0.54		$	2.01		$	1.26
	(Loss) from discontinued operations (net of tax)		(0.03	)		(0.06	)		(0.06	)		(0.11	)
	Net income	$	1.34		$	0.48		$	1.95		$	1.15
	Diluted net income (loss) per common share:
	Income from continuing operations	$	1.36		$	0.54		$	2		$	1.25
	(Loss) from discontinued operations (net of tax)		(0.03	)		(0.06	)		(0.07	)		(0.11	)
	Net income	$	1.33		$	0.48		$	1.93		$	1.14

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation	'
	5. Stock-Based Compensation
	At June 30, 2014, the Company had stock-based employee compensation plans as described below. For the three and six months ended June 30, 2014, the total compensation expense (included in selling, general and administrative expense) related to these plans was $225,000 and $334,000 ($150,000 and $221,000 net of tax), respectively. For the three and six months ended June 30, 2013, the total compensation expense was $210,000 and $332,000 ($148,000 and $241,000, net of tax), respectively.
	During the first quarter of 2014, the Company implemented a Long-Term Incentive Plan (the “2014 LTIP”) pursuant to the 2008 Incentive Stock Plan (the “2008 Plan”) which awarded restricted stock units (“RSUs”) to eligible executives. Under the terms of the 2014 LTIP, the number of RSUs that may vest, if any, will be based on, among other things, the Company achieving certain sales and return on invested capital (“ROIC”), as defined, targets during the January 2014 to December 2016 performance period. Earned RSUs, if any, cliff vest at the end of fiscal 2016 (100% of earned RSUs vest at December 31, 2016). The final value of these RSUs will be determined by the number of shares earned. The value of these RSUs is charged to compensation expense on a straight-line basis over the three year vesting period with periodic adjustments to account for changes in anticipated award amounts. The weighted-average price for these RSUs was $26.24 per share based on the grant date of March 3, 2014. During the three and six months ended June 30, 2014, $31,000 and $48,000 was charged to compensation expense. As of June 30, 2014, total unamortized compensation expense for this grant was $369,000. As of June 30, 2014, the maximum number of achievable RSUs under the 2014 LTIP was 22,000 RSUs.
	During the first quarter of 2014, the Company granted 91,000 stock options to two officers of the Company under the 2008 Incentive Stock Plan (the “2008 Plan”). The options issued vest in two equal installments each on the second and third anniversary of the grant date. The options granted are exercisable no later than 5 years after the grant date. Compensation expense is recognized straight-line over the vesting period of the options.
	During the first quarter of 2014, the Company granted 10,000 stock options to a key executive under the 2008 Plan. The options issued vest in three equal installments each on the first, second and third anniversary of the grant date. The options granted are exercisable no later than 10 years after the grant date. Compensation expense is recognized straight-line over the vesting period of the options.
	On May 9, 2013, the Company granted each Director 3,000 restricted shares pursuant to the 2008 Plan. The shares vest upon the first anniversary of the grant date. All shares vested and were granted under this award on May 9, 2014.
	On May 12, 2014, the Company granted each Director 3,000 restricted shares pursuant to the 2008 Plan. The shares vest upon the first anniversary of the grant date. Based on the terms of the awards the value of these restricted shares is charged to compensation expense on a straight-line basis over the one year vesting period. As a result, the Company recognized $54,000 of stock compensation expense during the second quarter of 2014. As of June 30, 2014, total unamortized compensation expense for this grant was $348,000. The weighted-average price of these restricted stock grants was $26.79 per share based on the grant date of May 12, 2014. As of June 30, 2014, no shares were granted under this award.
	On May 12, 2014, the shareholders of the Company approved an amendment to the 2008 Plan to increase number of shares of Common Stock subject to the 2008 Plan from 450,000 shares to 500,000 shares. As of June 30, 2014, there were 184,000 options outstanding under the 2008 Plan. As of June 30, 2014, there were 79,000 shares available for grant under the 2008 Plan.
	The Company uses the Black-Scholes option pricing model to value all stock options. Volatility is determined using changes in historical stock prices. The weighted average expected life computation is based on historical exercise patterns and post-vesting termination behavior. The interest rate for periods within the expected life of the award is based on the U.S. Treasury yield curve in effect at the time of grant.
	The fair value of all option grants was estimated using the Black-Scholes option pricing model with the following assumptions and weighted average fair values as follows:
		Six Months Ended
		June 30, 2014
	Weighted average fair value of grants	$	9
	Valuation assumptions:
	Expected dividend yield		0	%
	Expected volatility		47.62	%
	Expected life (in years)		3.35
	Risk-free interest rate		0.83	%
	No stock options were granted during the six months ended June 30, 2013.
	Stock Options
	Option activity under the principal option plans as of June 30, 2014 and changes during the six months ended June 30, 2014 were as follows:
		Outstanding			Weighted Average		Weighted Average		Aggregate Intrinsic
		Options			Exercise Price		Remaining Life		Value
		(in thousands)					(in years)		(in thousands)
	Outstanding as of December 31, 2013		83		$	11.99		3.28	$	1,247
	Granted		101			26.02
	Exercised		—			—
	Forfeited		—			—
	Expired		—			—
	Outstanding as of June 30, 2014		184		$	19.71		4.1	$	1,616
	Exercisable as of June 30, 2014		83		$	11.99		2.79	$	1,364
	The aggregate intrinsic value in the table above represents the total pretax intrinsic value (the difference between the Company’s closing stock price on the last trading day of the second quarter of fiscal 2014 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on June 30, 2014. This amount changes based on the fair market value of the Company’s stock. No options were exercised during the six months ended June 30, 2014. The total intrinsic value of options exercised for the six months ended June 30, 2013 was $185,000.
	As of June 30, 2014, $809,000 of total unrecognized compensation cost related to stock options is expected to be recognized over a weighted-average period of 2.7 years.
	Tax benefits resulting from tax deductions in excess of the compensation cost recognized for those options are classified as financing cash flows. No options were exercised during the six months ended June 30, 2014. Cash received from option exercises for the six months ended June 30, 2013 was $227,000. The actual tax benefit realized for the tax deduction from option exercises of share-based payment arrangements totaled $70,000 for the six months ended June 30, 2013. The Company has applied the “Short-cut” method in calculating the historical windfall tax benefits. All tax shortfalls will be applied against this windfall before being charged to earnings.

Income_Tax

Income Tax	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Tax	'
	6. Income Tax
	The Company calculates its interim tax provision in accordance with the provisions of ASC 740-270 “Income Taxes – Interim Reporting.” For each interim period the Company estimates its annual effective income tax rate and applies the estimated rate to its year-to-date income or loss before income taxes. The Company also computes the tax provision or benefit related to items separately reported, such as discontinued operations, and recognizes the items net of their related tax effect in the interim periods in which they occur. The Company also recognizes the effect of changes in enacted tax laws or rates in the interim periods in which the changes occur.
	For the six months ended June 30, 2014 and June 30, 2013, the estimated income tax rate from continuing operations was 34% and 27%, respectively. The increase in the effective tax rate was primarily due to the expiration of the federal research and development tax credits in 2014 as compared to 2013. In the first quarter of 2013, the Company recorded a research and development tax benefit for the quarter, plus the retroactive reinstatement of the federal research and development tax credits from the enactment of the American Tax Relief Act of 2012.
	During the three and six months ended June 30, 2014, the Company recorded additional benefits from state research and development tax credits of $61,000 and $122,000, respectively. During the three months ended June 30, 2013, the Company recorded additional benefits from federal and state research and development tax credits of $196,000 and $65,000, respectively. During the six months ended June 30, 2013, the Company recorded additional benefits from federal and state research and development tax credits of $496,000 and $98,000, respectively.
	As of June 30, 2014, the Company’s gross research and development tax credit carryforwards totaled approximately $1,165,000. Of these credits, approximately $493,000 can be carried forward for 15 years and will expire between 2015 and 2029, and approximately $672,000 of state credits can be carried forward indefinitely.
	The Company has recorded gross unrecognized tax benefits, excluding interest and penalties, as of June 30, 2014 and December 31, 2013 of $859,000 and $834,000, respectively. Tax benefits are recorded pursuant to the provisions of ASC 740 “Income Taxes.” If such unrecognized tax benefits are ultimately recorded in any period, the Company’s effective tax rate would be reduced accordingly for such period.
	The Company has adopted FASB Accounting Standard Update (“ASU”) 2013-11 effective during the first quarter of 2014. The pronouncement requires the Company to offset its uncertain tax positions against certain deferred tax assets in the same jurisdiction. During the six months ended June 30, 2014, the Company has reclassified $347,000 of its uncertain tax positions against its related deferred tax assets.
	The Company has been examined by the Internal Revenue Service (the “IRS”) through the calendar year 2010. State income tax statutes are generally open for periods back to and including the calendar year 2009.
	It is reasonably possible that the Company’s gross unrecognized tax benefits, including interest, may change within the next twelve months due to the expiration of the statutes of limitation of the federal government and various state governments by a range of zero to $327,000. The Company records such unrecognized tax benefits upon the expiration of the applicable statute of limitations or the settlement with tax authorities. As of June 30, 2014, the Company has a liability for unrecognized benefits of $512,000 and $347,000 for federal and state taxes, respectively. Such benefits relate primarily to expenses incurred in those jurisdictions.
	The Company classifies interest and penalties related to unrecognized tax benefits as income tax expense. At June 30, 2014, and December 31, 2013, the Company has accrued approximately $126,000 and $100,000 for the payment of interest and penalties, respectively.

Recently_Adopted_and_Issued_Ac

Recently Adopted and Issued Accounting Pronouncements	6 Months Ended
	Jun. 30, 2014
Accounting Changes And Error Corrections [Abstract]	'
Recently Adopted and Issued Accounting Pronouncements	'
	7. Recently Adopted and Issued Accounting Pronouncements
	In July 2013, the FASB issued ASU No. 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force),” which provides guidance on financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. ASU 2013-11 is effective for fiscal periods beginning after December 15, 2013. The implementation of this guidance did not have a material impact on the Company’s consolidated financial statements.
	In March 2014, the FASB issued ASU No. 2014-06, “Technical Corrections and Improvements Related to Glossary Terms,” which amends the FASB Accounting Standards Codification Master Glossary to clarify the Master Glossary of the Codification, consolidate multiple instances of the same term into a single definition, and makes minor improvements to the Master Glossary. The amendments are not expected to result in substantive changes to the application of existing guidance. ASU 2014-06 is effective upon issuance. The implementation of this guidance did not have a material impact on the Company’s consolidated financial statements.
	In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of an Entity,” which amends the guidance for reporting discontinued operations and disposals of components of an entity. The amended guidance requires that a disposal representing a strategic shift that has (or will have) a major effect on an entity’s financial results or a business activity classified as held for sale should be reported as discontinued operations. The amendments also expand the disclosure requirements for discontinued operations and add new disclosures for individually significant dispositions that do not qualify as discontinued operations. ASU 2014-08 is effective prospectively for fiscal periods beginning after December 15, 2014 (early adoption is permitted only for disposals that have not been previously reported). The implementation of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which provides guidance that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 is effective for fiscal periods beginning after December 15, 2016. Early application is not permitted. The Company is currently evaluating the impact of the implementation of this guidance on the Company’s consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-12, “Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (a consensus of the FASB Emerging Issues Task Force),” which requires a reporting entity to treat a performance target that affects vesting and that could be achieved after the requisite service period as a performance condition. ASU 2014-12 is effective for fiscal periods beginning after December 15, 2015. Earlier application is permitted. The implementation of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	8. Goodwill And Intangible Assets
	Acquisition in Fiscal 2012
	On February 27, 2012, the Company purchased certain assets of Pro-Dex Astromec, Inc. (“Astromec”), a subsidiary of Pro-Dex Inc. (“Pro-Dex”), for approximately $1,050,000, which includes the assumption of liabilities for an estimated earn-out of $294,000. The total liability for the earn-out as of June 30, 2014 and December 31, 2013 was $56,000 and $116,000, respectively. During the six month periods ended June 30, 2014, and June 30, 2013, $74,000 and $88,000 were paid related to the earn-out, respectively. The results from the acquisition date through June 30, 2014 are included in the SL Montevideo Technology, Inc. (“SL-MTI”) segment.
	Goodwill And Intangible Assets
	Intangible assets consist of the following:
					June 30, 2014												December 31, 2013
			Amortizable		Gross Value				Accumulated				Net Value				Gross Value				Accumulated				Net Value
			Life (years)						Amortization												Amortization
					(in thousands)
	Finite-lived intangible assets:
	Customer relationships		5 to 8		$	3,868			$	3,616			$	252			$	3,868			$	3,436			$	432
	Patents (1)		5 to 20			1,475				1,216				259				1,302				1,212				90
	Developed technology		5 to 6			1,700				1,700				—				1,700				1,700				—
	Licensing fees		5 to 10			550				435				115				550				398				152
	Total amortized finite-lived intangible assets					7,593				6,967				626				7,420				6,746				674
	Indefinite-lived intangible assets:
	Trademarks					1,672				—				1,672				1,672				—				1,672
	Other intangible assets, net				$	9,265			$	6,967			$	2,298			$	9,092			$	6,746			$	2,346
	-1	During 2014, the Company’s MTE division purchased a patent from a third party. The value of the asset is $160,000 and the estimated useful life of the asset is 14 years. During 2014. The Company’s MTE division also capitalized legal fees related to a new patent application. The estimated useful life of the asset is 20 years.
	In accordance with ASC 350 “Intangibles – Goodwill and Other,” goodwill and other indefinite-lived intangible assets are not amortized, but are tested for impairment. Such impairment testing is undertaken annually, or more frequently upon the occurrence of some indication that an impairment has taken place. The Company conducted an annual impairment test as of December 31, 2013.
	A two-step process is utilized to determine if goodwill has been impaired. In the first step, the fair value of each reporting unit is compared to the net asset value recorded for such unit. If the fair value exceeds the net asset value, the goodwill of the reporting unit is not adjusted. However, if the recorded net asset value exceeds the fair value, the Company performs a second step to measure the amount of impairment loss, if any. In the second step, the implied fair value of the reporting unit’s goodwill is compared with the goodwill recorded for such unit. If the recorded amount of goodwill exceeds the implied fair value, an impairment loss is recognized in the amount of the excess.
	Going forward there can be no assurance that economic conditions or other events may not have a negative material impact on the long-term business prospects of any of the Company’s reporting units. In such case, the Company may need to record an impairment loss, as stated above. The next annual impairment test will be conducted as of December 31, 2014, unless management identifies a triggering event in the interim.
	Management has not identified any triggering events, as defined by ASC 350, during the six months ended June 30, 2014. Accordingly, no interim impairment test has been performed.
	Estimated future amortization expense for intangible assets subject to amortization in each of the next five fiscal years is as follows:
			Amortization
			Expense
			(in thousands)
	2014		$	425
	2015		$	91
	2016		$	72
	2017		$	43
	2018		$	38
	Total amortization expense, excluding the amortization of deferred financing costs, consists of amortization expense related to intangible assets and software. Amortization expense related to intangible assets for the three months ended June 30, 2014 and June 30, 2013 was $111,000 and $113,000 respectively. Amortization expense related to intangible assets for the six months ended June 30, 2014 and June 30, 2013 was $220,000 and $224,000, respectively. Amortization expense related to software for the three months ended June 30, 2014 and June 30, 2013 was $51,000 and $37,000, respectively. Amortization expense related to software for the six months ended June 30, 2014 and June 30, 2013 was $100,000 and $73,000, respectively.
	The following table reflects the components of goodwill as of June 30, 2014, and December 31, 2013:
			June 30, 2014												December 31, 2013
			Gross				Accumulated				Goodwill,				Gross				Accumulated				Goodwill,
			Amount				Impairment				Net				Amount				Impairment				Net
							Losses												Losses
			(in thousands)
	SL Power Electronics Corp.		$	4,232				—			$	4,232			$	4,228				—			$	4,228
	High Power Group:
	MTE Corporation			8,189				—				8,189				8,189				—				8,189
	TEAL Electronics Corp.			5,055				5,055				—				5,055				5,055				—
	RFL Electronics Inc.			5,249				—				5,249				5,249				—				5,249
	Goodwill		$	22,725			$	5,055			$	17,670			$	22,721			$	5,055			$	17,666

Investments

Investments

6 Months Ended

Jun. 30, 2014

Investments Debt And Equity Securities [Abstract]

'

Investments

'

9. Investments

Investments in publicly traded equity securities (which include equity interests of less than 20%) are classified as available-for-sale securities. These investments are carried at fair value using quoted market prices and are included in other current assets in the Company’s Consolidated Balance Sheets. Unrealized gains and losses, net of tax, are included in the determination of comprehensive income and reported in shareholders’ equity.

Available-for-sale securities consist of the following as of June 30, 2014 and December 31, 2013:

June 30, 2014

December 31, 2013

(in thousands)

(in thousands)

Cost

Gains in

Estimated Fair

Cost

Gains in

Estimated Fair

Accumulated

Value

Accumulated

Value

Other

Other

Comprehensive

Comprehensive

Income

Income

Common stock

$

—

$

—

$

—

$

2,362

$

1,739

$

4,101

During the six months ended June 30, 2014, the Company sold all of its available-for-sale securities for total proceeds of $4,054,000. The gross realized gains on these sales totaled $1,585,000 ($997,000 net of tax), and $1,691,000 ($1,063,000 net of tax), for the three and six months ended June 30, 2014. For the purpose of determining gross realized gains, the cost of securities sold was based on the first in, first out (FIFO) method.

The Company had no available-for-sale securities during the six months ended June 30, 2013.

Debt

Debt	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	10. Debt
	Debt as of June 30, 2014 and December 31, 2013 consisted of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	2012 Credit Facility:
	$40 million variable interest rate senior revolving credit facility maturing in 2016	$	—		$	1,000
	Other capital leases with maturities through 2018		212			235
	Total debt		212			1,235
	Less current portion		(48	)		(1,048	)
	Total long-term portion	$	164		$	187
	On August 9, 2012, the Company entered into a Credit Agreement with PNC Bank, National Association, as administrative agent and lender (“PNC Bank”), and the lenders from time to time party thereto, as amended (the “2012 Credit Facility). The 2012 Credit Facility was amended on March 11, 2013 and June 20, 2013.
	The 2012 Credit Facility provides for borrowings up to $40,000,000 and under certain conditions maximum borrowings up to $70,000,000. The 2012 Credit Facility includes a sublimit for letters of credit and provides for a separate $10,700,000 letter of credit which expires one year from the date of closing, with annual extensions. The sublimit for letters of credit equals the lesser of (i) an amount equal to $5,000,000 plus the aggregate amount of Designated Usage LC issued and outstanding under the Designated Usage LC sublimit or (ii) $25,000,000. The 2012 Credit Facility expires on August 9, 2016.
	Borrowings under the 2012 Credit Facility bear interest, at the Company’s option, at the London interbank offering rate (“LIBOR”) plus a margin rate ranging from 1.25% to 2.0%, or the higher of a Base Rate plus a margin rate ranging from 0.25% to 1.0%. The Base Rate is equal to the highest of (i) the Federal Funds Open Rate plus 0.5% and (ii) the Prime Rate and (iii) the Daily Libor Rate plus 1%. The margin rates are based on certain leverage ratios, as defined. The Company is subject to compliance with certain financial covenants set forth in the 2012 Credit Facility, including, but not limited to, indebtedness to EBITDA, as defined, minimum levels of fixed charges and limitations on capital expenditures, as defined. Availability under the 2012 Credit Facility is based upon the Company’s trailing twelve month EBITDA, as defined.
	The Company’s obligations under the 2012 Credit Facility are secured by the grant of security interests in substantially all of its assets.
	On May 28, 2013, a letter of credit in the amount of $8,564,000 was issued in favor of the Environmental Protection Agency (“EPA”) to provide financial assurance related to the Company’s environmental payments in accordance with the terms of the Consent Decree reached with the United States Department of Justice (“DOJ”) and EPA related to its liability under the terms of the Consent Decree (see Note 13 for additional information). The letter of credit requires an annual commitment fee of 0.125% and standby commission of 1%, and does not reduce amounts available under the 2012 Credit Facility.
	On May 20, 2014, the Company made the second payment related to its obligation under the Consent Decree in the amount of $2,141,000, excluding interest. As of June 30, 2014, the total liability under the letter of credit equaled $6,423,000. The letter of credit expires on May 28, 2015, and is renewed annually.
	As of June 30, 2014, the Company had no outstanding balance under the 2012 Credit Facility. As of December 31, 2013, the Company had an outstanding balance of $1,000,000 under the 2012 Credit Facility. At June 30, 2014, and December 31, 2013, the Company had total availability under the 2012 Credit Facility of $39,527,000 and $38,526,000, respectively.
	The aggregate maturities on all long-term debt (including current portion) are:
		Capital
		Leases
		(in thousands)
	2014	$	24
	2015		48
	2016		48
	2017		48
	2018		44
	Total	$	212

Accrued_Liabilities_Other

Accrued Liabilities - Other	6 Months Ended
	Jun. 30, 2014
Text Block [Abstract]	'
Accrued Liabilities - Other	'
	11. Accrued Liabilities – Other
	Accrued liabilities – other consist of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	Taxes (other than income) and insurance	$	571		$	769
	Commissions		610			645
	Litigation and legal fees		187			121
	Other professional fees		403			624
	Environmental		8,166			4,589
	Warranty		1,281			1,145
	Deferred revenue		118			54
	Acquisition earn-out, current		56			107
	Other		2,642			2,205
	Accrued liabilities – other	$	14,034		$	10,259
	Included in the environmental accrual are estimates for all known costs believed to be probable and reasonably estimable for sites that the Company currently operates or operated at one time (see Note 13 for additional information).
	A liability is established for estimated future warranty and service claims that relate to current and prior period sales. The Company estimates warranty costs based on historical claim experience and other factors including evaluating specific product warranty issues.
	The following is a summary of activity in accrued warranty and service liabilities:
		June 30, 2014
		(in thousands)
	Liability, beginning of year	$	1,145
	Expense for new warranties issued		516
	Warranty claims paid		(380	)
	Liability, end of period	$	1,281

Other_LongTerm_Liabilities

Other Long-Term Liabilities	6 Months Ended
	Jun. 30, 2014
Other Liabilities Disclosure [Abstract]	'
Other Long-Term Liabilities	'
	12. Other Long-Term Liabilities
	Other long-term liabilities consist of the following:
		June 30,		December 31,
		2014		2013
		(in thousands)
	Environmental	$	11,247	$	17,200
	Unrecognized tax benefits, interest and penalties		638		934
	Long-term incentive plan		454		322
	Acquisition earn-out, long-term		—		9
	Other long-term liabilities	$	12,339	$	18,465

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	13. Commitments and Contingencies
	The Company is involved in certain legal and regulatory actions. Management believes that the ultimate resolution of such matters is unlikely to have a material adverse effect on the Company’s financial condition or results of operations, except as described below.
	Litigation: The Company has been and is the subject of administrative actions that arise from its ownership of SL Surface Technologies, Inc. (“SurfTech”), a wholly-owned subsidiary, the assets of which were sold in November 2003. SurfTech formerly operated chrome-plating facilities in Pennsauken Township, New Jersey (the “Pennsauken Site”) and Camden, New Jersey (the “Camden Site”).
	In 2006 the United States Environmental Protection Agency (the “EPA”) named the Company as a potential responsible party (a “PRP”) in connection with the remediation of the Puchack Well Field, which has been designated as a Superfund Site. The EPA is remediating the Puchack Well Field Superfund Site in two separate operable units. The first operable unit (“OU-1”) consists of an area of chromium groundwater contamination in three aquifers that exceeds the selected cleanup standard. The second operable unit (“OU-2”) pertains to sites that are allegedly the sources of contamination for the first operable unit.
	The Company has reached an agreement with both the United States Department of Justice (“DOJ”) and EPA effective April 30, 2013 related to its liability for both OU-1 and OU-2 pursuant to the terms of a Consent Decree which governs the agreement. Specifically, the Company has agreed to perform the remediation for OU-2 and pay a fixed sum for the EPA’s past cost for OU-2 and a portion of the EPA’s past cost for OU-1. The payments are to be made in five equal payments of $2,141,000, for a total $10,705,000, plus interest. The Company has also agreed to pay the EPA’s costs for oversight of the OU-2 remediation. The United States District Court judge signed the Consent Decree effective April 30, 2013, thereby triggering the Company’s obligation under the Consent Decree. On May 10, 2013, the Company made the first payment related to its obligation under the Consent Decree in the amount of $2,185,000, which included interest. On May 20, 2014, the Company made the second payment related to its obligation under the Consent Decree in the amount of $2,211,000, which included interest. The next three payments will be made on the anniversary of the prior year’s payment plus ten days in the same amount of $2,141,000, plus interest. In 2013, the Company had obtained financial assurances for the OU-2 remediation and the fixed payments as required by the terms of the Consent Decree. The financial instruments did not affect the Company’s availability under its Credit facility (see Note 10 Debt).
	The Company is currently in the final stages of the design phase of the remediation activities for OU-2. The “90% Pre-Final Remediation Design” (the “Pre-Final Design”) is expected to be submitted during the first week of August as required by the Scope of Work to complete the Company’s obligation under the Consent Decree. The Company expects the EPA to respond to this submission by the end of August. The Pre-Final Design, once approved by the EPA, will essentially set the scope of work for the Company’s remediation responsibility related to OU-2 under the terms of the Consent Decree. The Company expects to incur significant remediation costs, which have been accrued, to commence in the fall of 2014 and continue into early 2016.
	On December 3, 2012, the Company received a demand letter from the State of New Jersey. The demand is for $1,300,000 for past and future cleanup costs and $500,000 for natural resource damages (“NRD”) for a total of $1,800,000 (the “New Jersey Claim”). Although the Company and its counsel believe that it has meritorious defenses to any claim for reimbursement, on February 13, 2013 the Company offered to pay $250,000 to fully resolve the claim presented by the State of New Jersey for past costs, future costs and NRD at the Puchack Well Field Superfund site. The State of New Jersey has not responded to the Company’s counter-offer.
	Other
	In the ordinary course of its business the Company is and may be subject to other loss contingencies pursuant to foreign and domestic federal, state and local governmental laws and regulations and may be party to certain legal actions, frequently involving complaints by terminated employees and disputes with customers, suppliers and others. In the opinion of management, any such other loss contingencies are not expected to have a material adverse effect on the financial condition or results of operations of the Company.
	Environmental Matters: Loss contingencies include potential obligations to investigate and eliminate or mitigate the effects on the environment of the disposal or release of certain chemical substances at various sites, such as Superfund sites and other facilities, whether or not they are currently in operation. The Company is currently participating in environmental assessments and cleanups at a number of sites and in the future may be involved in additional environmental assessments and cleanups. Based upon investigations completed to date by the Company and its independent engineering-consulting firms, management has provided an estimated accrual for all known costs believed to be probable and costs that can be reasonably estimated in the amount of $19,413,000, of which $11,247,000 is included as other long-term liabilities, with the remainder recorded as other short-term accrued liabilities, as of June 30, 2014. However, it is the nature of environmental contingencies that other circumstances might arise, the costs of which are indeterminable at this time due to such factors as changing government regulations and stricter standards, the unknown magnitude of cleanup costs, and the unknown timing and extent of the remedial actions that may be required. These other circumstances could result in additional expenses or judgments, or offsets thereto. The adverse resolution of any one or more of these other circumstances could have a material adverse effect on the business, operating results, financial condition or cash flows of the Company. The Company’s environmental costs primarily relate to discontinued operations and such costs have been recorded in discontinued operations, net of tax.
	There are three sites on which the Company may incur material environmental costs in the future as a result of past activities of its former subsidiary, SurfTech. There are two Company owned sites related to its former subsidiary, SurfTech. These sites are located in Pennsauken, New Jersey (the “Pennsauken Site”) and in Camden, New Jersey (the “Camden Site”). There is also a third site, which is not owned by the Company, referred to as the “Puchack Well Field Site.” The Puchack Well Field Site and the Pennsauken Site are part of the Puchack Well Field Superfund Site.
	With respect to the Camden Site, the Company has reported soil contamination and a groundwater contamination plume emanating from the site. The New Jersey Department of Environmental Protection (“NJDEP”) approved, and the Company implemented in 2010, an interim remedial action pilot study to inject neutralizing chemicals into the unsaturated soil. Based on an assessment of post-injection data, our consultants believe the pilot study can be implemented as a full scale soil remedy to treat unsaturated contaminated soil. A Remedial Action Workplan for soils (“RAWP”) is being developed. The RAWP will select the injection remedy as the site wide remedy for unsaturated soils, along with demolition and proper disposal of the former concrete building slab and targeted excavation and disposal of impacted soil immediately underlying the slab. Additionally, the RAWP will address a small area of impacted soil off the property. The RAWP for soils will be submitted to the NJDEP in the third quarter of 2014, by the Licensed Site Remediation Professional (“LSRP”) for the site. The RAWP is scheduled to be implemented in the fourth quarter of 2014, so that the injections do not impact the bio-barrier pilot tests mentioned below. The Company’s environmental consultants finalized an interim remedial action pilot study to treat on-site contaminated groundwater, consisting of injecting food-grade product, into the groundwater at the down gradient property boundary, to create a “bio-barrier.” The pilot study includes post-injection monitoring to assess the bio-barrier’s ability to treat contaminated groundwater. Implementation of the groundwater pilot study is currently underway with post-injection effectiveness monitoring expected to continue through the third quarter of 2015.
	As previously reported, the Company is currently participating in environmental assessments and cleanups at a number of sites. One of these sites is a commercial facility, located in Wayne, New Jersey. Contaminated soil and groundwater has undergone remediation with NJDEP and LSRP oversight, but contaminants of concern (“COCs”) in groundwater and surface water, which extend off-site, still remain above applicable NJDEP remediation standards. A soil remedial action plan has been developed to remove the new soil source contamination that continues to impact groundwater. Our LSRP filed a RAWP and permit application with the NJDEP to implement a supplemental groundwater remedial action that will likely consist of additional in-situ injections of food grade product into on-site groundwater. The NJDEP has issued a permit authorizing the remedial action to proceed which is scheduled to occur in the fourth quarter of 2014. Estimates have been developed by the Company’s consultants, which includes costs to enhance the existing vapor intrusion system, remedial injections, soil excavation and additional tests and remedial activities. Costs related to this site are recorded as part of discontinued operations, net of tax. The “Remedial Investigation” deadline for this site has been extended to May 7, 2016.
	The Company has reported soil and groundwater contamination at the facility of SL-MTI located on its property in Montevideo, Minnesota. An analysis of the contamination has been completed and a remediation plan has been implemented at the site pursuant to the remedial action plan approved by the Minnesota Pollution Control Agency. A soil vapor extraction system has been operating at the site since October 2008. In 2013 the regulatory and screening levels for soil vapor and groundwater were lowered for some of the contaminants at the site. In response to this regulatory change, SL-MTI’s consultants are conducting additional testing to delineate site impacts and update the site conceptual model. Costs related to this site are recorded as a component of continuing operations.
	As of June 30, 2014 and December 31, 2013, environmental accruals of $19,413,000 and $21,789,000, respectively, have been recorded by the Company in accrued liabilities – other and in other long-term liabilities, as appropriate (see Notes 11 and 12 for additional information).

Segment_Information

Segment Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	14. Segment Information
	The Company currently operates under four business segments: SL Power Electronics Corp. (“SLPE”), the High Power Group, SL-MTI and RFL Electronics Inc. (“RFL”). TEAL Electronics Corp (“TEAL”) and MTE Corporation (“MTE”) are combined into one business segment, which is reported as the High Power Group. The Company aggregates operating business subsidiaries into a single segment for financial reporting purposes if aggregation is consistent with the objectives of ASC 280 “Segment Reporting.” Business units are also combined if they have similar characteristics in each of the following areas:
		•		nature of products and services
		•		nature of production process
		•		type or class of customer
		•		methods of distribution
	SLPE designs, manufactures and markets high-reliability power conversion products in internal and external footprints. The Company’s power supplies provide a reliable and safe power source for the customer’s specific equipment needs. SLPE, which sells products under three brand names (SL Power Electronics, Condor and Ault), is a major supplier to the original equipment manufacturers (“OEMs”) of medical, industrial/instrumentation, military and information technology equipment. The High Power Group sells products under two brand names (TEAL and MTE). TEAL designs and manufactures custom power conditioning and distribution units for OEMs of medical imaging, medical treatment, military aerospace, semiconductor, solar and advanced simulation systems. MTE designs and manufactures power quality products used to protect equipment from power surges, bring harmonics into compliance and improve the efficiency of variable speed motor drive systems. SL-MTI designs and manufactures high power density precision motors that are used in numerous applications, including military and commercial aerospace, oil and gas, and medical and industrial products. RFL designs and manufactures communication and power protection products/systems that are used to protect electric utility transmission lines and apparatus by isolating faulty transmission lines from a transmission grid. The Unallocated Corporate Expenses segment includes corporate related items, financing activities and other costs not allocated to reportable segments, which includes but is not limited to certain treasury, risk management, legal, litigation and public reporting charges and certain legacy costs. The accounting policies for the business units are the same as those described in the summary of significant accounting policies. For additional information, see Note 1 of the Notes to the Consolidated Financial Statements included in Part IV of the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	Business segment operations are conducted through domestic subsidiaries. For all periods presented, sales between business segments were not material. Each of the segments has certain major customers, the loss of any of which would have a material adverse effect on such segment.
	The unaudited comparative results for the three and six month periods ended June 30, 2014 and June 30, 2013 are as follows:
			Three Months Ended						Six Months Ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in thousands)						(in thousands)
	Net sales
	SLPE		$	19,099		$	18,386		$	36,683		$	35,980
	High Power Group			22,452			17,607			42,762			34,700
	SL-MTI			10,118			9,060			20,970			18,154
	RFL			5,080			4,733			8,919			10,047
	Net sales		$	56,749		$	49,786		$	109,334		$	98,881
			Three Months Ended						Six Months Ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in thousands)						(in thousands)
	Income from operations
	SLPE		$	2,293		$	1,131		$	3,232		$	2,181
	High Power Group			3,921			2,038			6,838			4,152
	SL-MTI			1,808			1,569			3,903			2,882
	RFL			479			393			440			1,329
	Unallocated Corporate Expenses (1)			(1,726	)		(1,500	)		(3,229	)		(2,927	)
	Income from operations		$	6,775		$	3,631		$	11,184		$	7,617
	-1	Unallocated Corporate Expenses includes corporate related items, financing activities and other costs not allocated to reportable segments, which includes but is not limited to certain legal, litigation and public reporting charges and certain legacy costs.
	Total assets as of June 30, 2014 and December 31, 2013 are as follows:
			June 30,			December 31,
			2014			2013
			(in thousands)
	Total assets
	SLPE		$	34,112		$	36,835
	High Power Group			32,997			29,506
	SL-MTI			15,423			14,601
	RFL			14,182			13,503
	Unallocated Corporate Assets			23,546			18,889
	Total assets		$	120,260		$	113,334
	Goodwill and other intangible assets, net, as of June 30, 2014 and December 31, 2013 are as follows:
			June 30,			December 31,
			2014			2013
			(in thousands)
	Goodwill and other intangible assets, net
	SLPE		$	4,532		$	4,528
	High Power Group			9,982			9,976
	SL-MTI			90			106
	RFL			5,364			5,402
	Goodwill and other intangible assets, net		$	19,968		$	20,012

Retirement_Plans_and_Deferred_

Retirement Plans and Deferred Compensation	6 Months Ended
	Jun. 30, 2014
Compensation And Retirement Disclosure [Abstract]	'
Retirement Plans and Deferred Compensation	'
	15. Retirement Plans and Deferred Compensation
	During the six months ended June 30, 2014 and June 30, 2013, the Company maintained a defined contribution pension plan covering all full-time, U.S. employees of SLPE, the High Power Group, including TEAL and MTE, SL-MTI, RFL, and the corporate office. The Company’s contributions to this plan are based on a percentage of employee contributions and/or plan year gross wages, as defined. Costs incurred under these plans amounted to $153,000 and $382,000 during the three and six months ended June 30, 2014 compared to $150,000 and $337,000 during the three and six months ended June 30, 2013.
	The Company has agreements with certain retired directors, officers and key employees providing for supplemental retirement benefits. The liability for supplemental retirement benefits is based on the most recent mortality tables available and discount rates ranging from 6% to 12%. The amount charged to expense in connection with these agreements amounted to $87,000 and $151,000 for the three month and six month periods ended June 30, 2014 compared to $90,000 and $132,000 for the three month and six month periods ended June 30, 2013.

Discontinued_Operations

Discontinued Operations	6 Months Ended
	Jun. 30, 2014
Discontinued Operations And Disposal Groups [Abstract]	'
Discontinued Operations	'
	16. Discontinued Operations
	For the three and six months ended June 30, 2014, total loss from discontinued operations before income taxes was $210,000 and $436,000 ($127,000 and $265,000, net of tax). For the three and six months ended June 30, 2013, total loss from discontinued operations before income taxes was $390,000 and $748,000 ($237,000 and $455,000, net of tax), respectively. The loss from discontinued operations in 2014 and 2013 relates to environmental remediation costs, consulting fees, and legal expenses associated with the past operations of the Company’s five environmental sites (See Note 13 – Commitments and Contingencies for further information concerning the environmental sites).

Fair_Value_Measurement_and_Fin

Fair Value Measurement and Financial Instruments	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurement and Financial Instruments	'
	17. Fair Value Measurement and Financial Instruments
	ASC 820 defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. ASC 820 applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements; accordingly, the standard does not require any new fair value measurements of reported balances.
	ASC 820 emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).
	Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
	Currently, the Company uses foreign currency forward contracts to hedge its foreign currency risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including spot rates and market forward points. The fair value of the foreign currency forward contracts is based on interest differentials between the currencies being traded, spot rates and market forward points.
	To comply with the provisions of ASC 820, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees, where applicable.
	Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of June 30, 2014, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.
	In conjunction with its implementation of updates to the fair value measurements guidance, the Company made an accounting policy election to measure derivative financial instruments subject to master netting agreements on a net basis.
	During the third quarter of 2013, the Company purchased publicly traded equity securities which had been classified as available-for-sale securities. Fair values for these investments were based on closing stock prices from active markets for identical assets and therefore were classified within Level 1 of the fair value hierarchy. The fair value of available-for-sale securities was included in other current assets in the Company’s Consolidated Balance Sheets at December 31, 2013 (see Note 9 for additional information). During the six months ended June 30, 2014, the Company sold all of its available-for-sale securities.
	The following table presents the Company’s assets and liabilities measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013, aggregated by the level in the fair value hierarchy within which those measurements fall:
		Quoted Prices in Active		Significant Other		Significant Unobservable		Balance at
		Markets for Identical Assets		Observable		Inputs (Level 3)		June 30, 2014
		and Liabilities (Level 1)		Inputs (Level 2)
		(in thousands)
	Liabilities
	Derivative financial instruments	$	—	$	69	$	—	$	69
		Quoted Prices in Active		Significant Other		Significant Unobservable		Balance at
		Markets for Identical Assets		Observable		Inputs (Level 3)		December 31, 2013
		and Liabilities (Level 1)		Inputs (Level 2)
		(in thousands)
	Assets
	Available-for-sale securities	$	4,101	$	—	$	—	$	4,101
	Derivative financial instruments		—		152		—		152
	Total Assets	$	4,101	$	152	$	—	$	4,253
	The Company believes that the fair values of its current assets and current liabilities (cash and cash equivalents, receivables, net, short-term borrowings and current portion of long-term debt, accounts payable, and accrued liabilities) and the fair value of its long-term debt, less current maturities, approximate their reported carrying amounts.
	The Company does not have any fair value measurements using significant unobservable inputs (Level 3) as of June 30, 2014.
	Credit Risk Contingent Features
	The Company has agreements with its derivative counterparties that contain a provision where if the Company defaults or is capable of being declared in default on any of its indebtedness, then the Company could also be declared in default on its derivative obligations.

Derivative_Instruments_and_Hed

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities	'
	18. Derivative Instruments and Hedging Activities
	ASC Topic 815, as amended and interpreted, establishes accounting and reporting standards for derivative instruments, including certain derivative instruments embedded in other contracts, and for hedging activities. As required by ASC Topic 815, the Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to variability in expected future cash flows related to forecasted foreign exchange-based risk are considered economic hedges of the Company’s forecasted cash flows.
	Risk Management Objective of Using Derivatives
	The Company is a U.S. dollars (USD) functional currency entity that manufactures products in the USA, Mexico and China. The Company’s sales are priced in USD and its costs and expenses are priced in USD, Mexican pesos (MXN) and Chinese Yuan (CNH). As a result, the Company has exposure to changes in exchange rates between the time when expenses in the non-functional currencies are initially incurred and the time when the expenses are ultimately paid. The Company’s objective in using derivatives is to add stability and to manage its exposure to foreign exchange risks. To accomplish this objective, the Company uses foreign currency forward contracts to manage its exposure to fluctuations in the exchange rates. Foreign currency forward contracts involve fixing the USD-MXN and USD-CNH exchange rates for delivery of a specified amount of foreign currency on a specified date.
	During 2013 and 2014, the Company entered into a series of foreign currency forward contracts to hedge its exposure to foreign exchange rate movements in its forecasted expenses in China and Mexico. The foreign currency forwards are not speculative and are being used to manage the Company’s exposure to foreign exchange rate movements. Foreign currency forward contracts involve fixing the USD-MXN and USD-CNH exchange rates for delivery of a specified amount of foreign currency on a specified date. The Company has elected not to apply hedge accounting to these derivatives and they are marked to market through earnings. Therefore, gains and losses resulting from changes in the fair value of these contracts are recognized at the end of each reporting period directly in earnings. The gains and losses associated with the foreign currency forward contracts are included in other gain (loss), net on the Consolidated Statements of Income. As of June 30, 2014, the fair value of the foreign currency forward contracts was recorded as a $69,000 liability in other current liabilities on the Consolidated Balance Sheets. As of December 31, 2013, the fair value of the foreign currency forward contracts was recorded as a $152,000 asset in other current assets on the Consolidated Balance Sheets.
	Non-designated Hedges of Foreign Exchange Risk
	The notional amounts are used to measure the volume of foreign currency forward contracts and do not represent exposure to foreign currency losses. The following table summarizes the notional values of the Company’s derivative financial instruments as of June 30, 2014.
	Product	Number of Instruments		Notional
				(in thousands)
	Mexican Peso (MXN) Forward Contracts		17	MXN	86,632
	Chinese Yuan (CNH) Forward Contracts		18	CNH	93,019
	The following table details the location in the financial statements of the gain or loss recognized on foreign currency forward contracts that are marked to market for the three and six months ended June 30, 2014 and June 30, 2013:
				Three Months Ended					Three Months Ended
				June 30, 2014					June 30, 2013
	Derivatives Not Designated as Hedging	Location of Income (Loss)		Amount of Income			Location of Income (Loss)		Amount of Income
	Instruments	Recognized in Income on		(Loss) Recognized in			Recognized in Income on		(Loss) Recognized in
		Derivative		Income on Derivative			Derivative		Income on
									Derivative
				(in thousands)					(in thousands)
	Foreign Exchange Contracts		Other gain (loss), net	$	142			Other gain (loss), net	$	(301	)
				Six Months Ended					Six Months Ended
				30-Jun-14					30-Jun-13
	Derivatives Not Designated as Hedging	Location of Income (Loss)		Amount of Income			Location of Income (Loss)		Amount of Income
	Instruments	Recognized in Income on		(Loss) Recognized in			Recognized in Income on		(Loss) Recognized in
		Derivative		Income on Derivative			Derivative		Income on
									Derivative
				(in thousands)					(in thousands)
	Foreign Exchange Contracts		Other gain (loss), net	$	(221	)		Other gain (loss), net	$	(327	)

Other_Gain_Loss_net

Other Gain (Loss), net	6 Months Ended
	Jun. 30, 2014
Other Income And Expenses [Abstract]	'
Other Gain (Loss), net	'
	19. Other Gain (Loss), net
	Other gain (loss), net for the six months ended June 30, 2014 includes a $1,691,000 gain recognized from the sale of available-for-sale securities (see Note 9 – Investments for further information) and $9,000 of dividend income received from investments in available-for-sale securities, which were partially offset by a $221,000 unrealized loss on foreign currency forward contracts. Other gain (loss), net for the six months ended June 30, 2013 includes a $327,000 unrealized loss on foreign currency forward contracts.

Foreign_Operations

Foreign Operations	6 Months Ended
	Jun. 30, 2014
Text Block [Abstract]	'
Foreign Operations	'
	20. Foreign Operations
	As a result of a work stoppage at the Company’s Xianghe manufacturing facilities from March 7, 2013 through March 20, 2013, revenues for the quarter ended March 31, 2013 were adversely impacted by approximately $900,000. The Company realized those sales during the second quarter of 2013. Additionally, certain incremental costs were incurred during the six months ended June 30, 2013 related to the work stoppage, including employee, travel, consulting and legal costs of $535,000. No incremental costs were incurred during the six months ended June 30, 2014.

Shareholders_Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Shareholders' Equity	'
	21. Shareholders’ Equity
	On November 16, 2010, the Board of Directors authorized a plan that allows for the repurchase up to an aggregate of 470,000 shares of the Company’s outstanding common stock (the “2010 Repurchase Plan”). Any repurchases pursuant to the 2010 Repurchase Plan would be made in the open market or in negotiated transactions. During the first six months of 2014, the Company purchased approximately 4,000 shares of Company stock at an average price of $24.68 a share. As a result, as of June 30, 2014, approximately 239,000 shares remained available for purchase under the 2010 Repurchase Plan.

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	22. Related Party Transactions
	On May 1, 2014, the Company renewed the Management Services Agreement (“Management Services Agreement”) with SP Corporate Services LLC (“SP Corporate”). SP Corporate is an affiliate of SPH Group Holdings LLC (“SPHG”). A member of the Company’s Board of Directors, Warren G. Lichtenstein, is affiliated with SPHG. Also, the Company’s Chairman of the Board, Glen M. Kassan is affiliated with SPHG. Pursuant to the Management Services Agreement, SP Corporate agreed to provide, at the direction of the Company’s Chief Executive Officer, non-exclusive services to support the Company’s growth strategy, business development, planning, execution assistance and related support services. The monthly fee for these services is $10,400 paid in advance. The Management Services Agreement has a term of one year and has been approved by the Audit Committee of the Board of Directors and a majority of the disinterested directors of the Company.

Restructuring_Costs

Restructuring Costs	6 Months Ended
	Jun. 30, 2014
Restructuring And Related Activities [Abstract]	'
Restructuring Costs	'
	23. Restructuring Costs
	Restructuring activity for the period ended June 30, 2014 was as follows:
		Accrual at		Charged to		Cash		Accrual at
		Beginning of		Earnings		Payments		June 30, 2014
		the Year
		(in thousands)
	2014 Plan
	Severance and other employee-related charges	$	—	$	463	$	453	$	10
	No restructuring activity was recognized during 2013.
	2014 Restructuring Plan
	During the first quarter of 2014, the Company announced to its employees a restructuring plan (“2014 Plan”) to align its costs with current and projected sales activity. The costs reductions were primarily production, engineering, selling and administration employees at the High Power Group. As of June 30, 2014, there was a consolidated charge to earnings of $463,000, which was composed of severance and other employee related charges. The total number of employees affected by the restructuring plan was 11, all of which had been terminated during the first quarter of 2014.

Subsequent_Event

Subsequent Event	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Event	'
	24. Subsequent Event
	On July 25, 2014, the Company entered into an Asset Purchase Agreement (the “Agreement”) to purchase certain assets and assume certain liabilities of Dynetic Systems, Inc. (“Dynetic Systems”), for an initial purchase price of $4,000,000. The agreement provides for certain target working capital adjustments and an earn-out provision commencing on the closing date through December 31, 2017. Dynetic Systems designs, develops and manufactures precision quality, instrument grade motion control products. Dynetic Systems provides custom motor and motion control solutions to the aerospace, defense, medical, commercial and industrial markets. The financial results from the acquisition will be included in the SL-MTI segment.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis Of Presentation
	The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X promulgated under the Securities Exchange Act of 1934, as amended. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, the accompanying financial statements contain all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation. Operating results for interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. These financial statements should be read in conjunction with the Company’s audited financial statements and notes thereon included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. Unless the context requires otherwise, the terms the “Company,” “SL Industries,” “we,” “us” and “our” mean SL Industries, Inc., a Delaware corporation, and its consolidated subsidiaries.
Income Per Share	'
	Income Per Share
	The Company has presented net income (loss) per common share pursuant to Accounting Standards Codification (“ASC”) 260 “Earnings Per Share.” Basic net income (loss) per common share is computed by dividing reported net income (loss) available to common shareholders by the weighted-average number of shares outstanding for the period.
	Diluted net income (loss) per common share is computed by dividing reported net income (loss) available to common shareholders by the weighted-average shares outstanding for the period, adjusted for the dilutive effect of common stock equivalents, which consist of stock options, using the treasury stock method. For the three and six months ended June 30, 2014, 13,000 and 11,000 stock options were excluded from the dilutive computation, respectively, as the impact of their inclusion would have been anti-dilutive. There were no anti-dilutive options for the three and six months ended June 30, 2013.
Income Tax	'
	Income Tax
	The Company calculates its interim tax provision in accordance with the provisions of ASC 740-270 “Income Taxes – Interim Reporting.” For each interim period the Company estimates its annual effective income tax rate and applies the estimated rate to its year-to-date income or loss before income taxes. The Company also computes the tax provision or benefit related to items separately reported, such as discontinued operations, and recognizes the items net of their related tax effect in the interim periods in which they occur. The Company also recognizes the effect of changes in enacted tax laws or rates in the interim periods in which the changes occur.
Recently Adopted and Issued Accounting Pronouncements	'
	Recently Adopted and Issued Accounting Pronouncements
	In July 2013, the FASB issued ASU No. 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force),” which provides guidance on financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. ASU 2013-11 is effective for fiscal periods beginning after December 15, 2013. The implementation of this guidance did not have a material impact on the Company’s consolidated financial statements.
	In March 2014, the FASB issued ASU No. 2014-06, “Technical Corrections and Improvements Related to Glossary Terms,” which amends the FASB Accounting Standards Codification Master Glossary to clarify the Master Glossary of the Codification, consolidate multiple instances of the same term into a single definition, and makes minor improvements to the Master Glossary. The amendments are not expected to result in substantive changes to the application of existing guidance. ASU 2014-06 is effective upon issuance. The implementation of this guidance did not have a material impact on the Company’s consolidated financial statements.
	In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of an Entity,” which amends the guidance for reporting discontinued operations and disposals of components of an entity. The amended guidance requires that a disposal representing a strategic shift that has (or will have) a major effect on an entity’s financial results or a business activity classified as held for sale should be reported as discontinued operations. The amendments also expand the disclosure requirements for discontinued operations and add new disclosures for individually significant dispositions that do not qualify as discontinued operations. ASU 2014-08 is effective prospectively for fiscal periods beginning after December 15, 2014 (early adoption is permitted only for disposals that have not been previously reported). The implementation of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which provides guidance that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 is effective for fiscal periods beginning after December 15, 2016. Early application is not permitted. The Company is currently evaluating the impact of the implementation of this guidance on the Company’s consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-12, “Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (a consensus of the FASB Emerging Issues Task Force),” which requires a reporting entity to treat a performance target that affects vesting and that could be achieved after the requisite service period as a performance condition. ASU 2014-12 is effective for fiscal periods beginning after December 15, 2015. Earlier application is permitted. The implementation of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.
Goodwill and Intangible Assets	'
	In accordance with ASC 350 “Intangibles – Goodwill and Other,” goodwill and other indefinite-lived intangible assets are not amortized, but are tested for impairment. Such impairment testing is undertaken annually, or more frequently upon the occurrence of some indication that an impairment has taken place. The Company conducted an annual impairment test as of December 31, 2013.
	A two-step process is utilized to determine if goodwill has been impaired. In the first step, the fair value of each reporting unit is compared to the net asset value recorded for such unit. If the fair value exceeds the net asset value, the goodwill of the reporting unit is not adjusted. However, if the recorded net asset value exceeds the fair value, the Company performs a second step to measure the amount of impairment loss, if any. In the second step, the implied fair value of the reporting unit’s goodwill is compared with the goodwill recorded for such unit. If the recorded amount of goodwill exceeds the implied fair value, an impairment loss is recognized in the amount of the excess.
	Going forward there can be no assurance that economic conditions or other events may not have a negative material impact on the long-term business prospects of any of the Company’s reporting units. In such case, the Company may need to record an impairment loss, as stated above. The next annual impairment test will be conducted as of December 31, 2014, unless management identifies a triggering event in the interim.
	Management has not identified any triggering events, as defined by ASC 350, during the six months ended June 30, 2014. Accordingly, no interim impairment test has been performed.
Segment Information	'
	Segment Information
	The Company currently operates under four business segments: SL Power Electronics Corp. (“SLPE”), the High Power Group, SL-MTI and RFL Electronics Inc. (“RFL”). TEAL Electronics Corp (“TEAL”) and MTE Corporation (“MTE”) are combined into one business segment, which is reported as the High Power Group. The Company aggregates operating business subsidiaries into a single segment for financial reporting purposes if aggregation is consistent with the objectives of ASC 280 “Segment Reporting.” Business units are also combined if they have similar characteristics in each of the following areas:
		•	nature of products and services
		•	nature of production process
		•	type or class of customer
		•	methods of distribution
Fair Value Measurement and Financial Instruments	'
	Fair Value Measurement and Financial Instruments
	ASC 820 defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. ASC 820 applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements; accordingly, the standard does not require any new fair value measurements of reported balances.
	ASC 820 emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).
	Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
	Currently, the Company uses foreign currency forward contracts to hedge its foreign currency risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including spot rates and market forward points. The fair value of the foreign currency forward contracts is based on interest differentials between the currencies being traded, spot rates and market forward points.
	To comply with the provisions of ASC 820, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees, where applicable.
	Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of June 30, 2014, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.
	In conjunction with its implementation of updates to the fair value measurements guidance, the Company made an accounting policy election to measure derivative financial instruments subject to master netting agreements on a net basis.
Derivative Instruments and Hedging Activities	'
	Derivative Instruments and Hedging Activities
	ASC Topic 815, as amended and interpreted, establishes accounting and reporting standards for derivative instruments, including certain derivative instruments embedded in other contracts, and for hedging activities. As required by ASC Topic 815, the Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to variability in expected future cash flows related to forecasted foreign exchange-based risk are considered economic hedges of the Company’s forecasted cash flows.

Receivables_Tables

Receivables (Tables)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Receivables	'
	Receivables consist of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	Trade receivables	$	34,482		$	30,766
	Less: allowance for doubtful accounts		(379	)		(581	)
	Trade receivables, net		34,103			30,185
	Recoverable income taxes		273			344
	Other		500			236
	Receivables, net	$	34,876		$	30,765

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories consist of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	Raw materials	$	16,988		$	16,198
	Work in process		4,669			4,842
	Finished goods		4,013			4,124
	Gross inventory		25,670			25,164
	Less: allowances		(2,594	)		(2,201	)
	Inventories, net	$	23,076		$	22,963

Income_Per_Share_Tables

Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Net Income (Loss) Per Share	'
	The table below sets forth the computation of basic and diluted net income (loss) per share:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
		(in thousands, except per share amounts)
	Basic net income available to common shareholders:
	Net income available to common shareholders from continuing operations	$	5,655		$	2,252		$	8,320		$	5,236
	Diluted net income available to common shareholders from continuing operations	$	5,655		$	2,252		$	8,320		$	5,236
	Shares:
	Basic weighted average number of common shares outstanding		4,138			4,157			4,133			4,148
	Common shares assumed upon exercise of stock options		30			47			30			41
	Diluted weighted average number of common shares outstanding		4,168			4,204			4,163			4,189
	Basic net income (loss) per common share:
	Income from continuing operations	$	1.37		$	0.54		$	2.01		$	1.26
	(Loss) from discontinued operations (net of tax)		(0.03	)		(0.06	)		(0.06	)		(0.11	)
	Net income	$	1.34		$	0.48		$	1.95		$	1.15
	Diluted net income (loss) per common share:
	Income from continuing operations	$	1.36		$	0.54		$	2		$	1.25
	(Loss) from discontinued operations (net of tax)		(0.03	)		(0.06	)		(0.07	)		(0.11	)
	Net income	$	1.33		$	0.48		$	1.93		$	1.14

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Assumptions and Weighted Average Fair Values	'
	The fair value of all option grants was estimated using the Black-Scholes option pricing model with the following assumptions and weighted average fair values as follows:
		Six Months Ended
		June 30, 2014
	Weighted average fair value of grants	$	9
	Valuation assumptions:
	Expected dividend yield		0	%
	Expected volatility		47.62	%
	Expected life (in years)		3.35
	Risk-free interest rate		0.83	%
Option Activity under Principal Option Plans	'
	Option activity under the principal option plans as of June 30, 2014 and changes during the six months ended June 30, 2014 were as follows:
		Outstanding			Weighted Average		Weighted Average		Aggregate Intrinsic
		Options			Exercise Price		Remaining Life		Value
		(in thousands)					(in years)		(in thousands)
	Outstanding as of December 31, 2013		83		$	11.99		3.28	$	1,247
	Granted		101			26.02
	Exercised		—			—
	Forfeited		—			—
	Expired		—			—
	Outstanding as of June 30, 2014		184		$	19.71		4.1	$	1,616
	Exercisable as of June 30, 2014		83		$	11.99		2.79	$	1,364

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Schedule of Intangible Assets	'
	Intangible assets consist of the following:
					June 30, 2014												December 31, 2013
			Amortizable		Gross Value				Accumulated				Net Value				Gross Value				Accumulated				Net Value
			Life (years)						Amortization												Amortization
					(in thousands)
	Finite-lived intangible assets:
	Customer relationships		5 to 8		$	3,868			$	3,616			$	252			$	3,868			$	3,436			$	432
	Patents (1)		5 to 20			1,475				1,216				259				1,302				1,212				90
	Developed technology		5 to 6			1,700				1,700				—				1,700				1,700				—
	Licensing fees		5 to 10			550				435				115				550				398				152
	Total amortized finite-lived intangible assets					7,593				6,967				626				7,420				6,746				674
	Indefinite-lived intangible assets:
	Trademarks					1,672				—				1,672				1,672				—				1,672
	Other intangible assets, net				$	9,265			$	6,967			$	2,298			$	9,092			$	6,746			$	2,346
	-1	During 2014, the Company’s MTE division purchased a patent from a third party. The value of the asset is $160,000 and the estimated useful life of the asset is 14 years. During 2014. The Company’s MTE division also capitalized legal fees related to a new patent application. The estimated useful life of the asset is 20 years.
Estimated Future Amortization Expense for Intangible Assets Subject to Amortization	'
	Estimated future amortization expense for intangible assets subject to amortization in each of the next five fiscal years is as follows:
			Amortization
			Expense
			(in thousands)
	2014		$	425
	2015		$	91
	2016		$	72
	2017		$	43
	2018		$	38
Components of Goodwill	'
	The following table reflects the components of goodwill as of June 30, 2014, and December 31, 2013:
			June 30, 2014												December 31, 2013
			Gross				Accumulated				Goodwill,				Gross				Accumulated				Goodwill,
			Amount				Impairment				Net				Amount				Impairment				Net
							Losses												Losses
			(in thousands)
	SL Power Electronics Corp.		$	4,232				—			$	4,232			$	4,228				—			$	4,228
	High Power Group:
	MTE Corporation			8,189				—				8,189				8,189				—				8,189
	TEAL Electronics Corp.			5,055				5,055				—				5,055				5,055				—
	RFL Electronics Inc.			5,249				—				5,249				5,249				—				5,249
	Goodwill		$	22,725			$	5,055			$	17,670			$	22,721			$	5,055			$	17,666

Investments_Tables

Investments (Tables)

6 Months Ended

Jun. 30, 2014

Investments Debt And Equity Securities [Abstract]

'

Schedule of Available-for-Sale Securities

'

Available-for-sale securities consist of the following as of June 30, 2014 and December 31, 2013:

June 30, 2014

December 31, 2013

(in thousands)

(in thousands)

Cost

Gains in

Estimated Fair

Cost

Gains in

Estimated Fair

Accumulated

Value

Accumulated

Value

Other

Other

Comprehensive

Comprehensive

Income

Income

Common stock

$

—

$

—

$

—

$

2,362

$

1,739

$

4,101

Debt_Tables

Debt (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Debt	'
	Debt as of June 30, 2014 and December 31, 2013 consisted of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	2012 Credit Facility:
	$40 million variable interest rate senior revolving credit facility maturing in 2016	$	—		$	1,000
	Other capital leases with maturities through 2018		212			235
	Total debt		212			1,235
	Less current portion		(48	)		(1,048	)
	Total long-term portion	$	164		$	187
Summary of Aggregate Maturities on All Long-Term Debt	'
	The aggregate maturities on all long-term debt (including current portion) are:
		Capital
		Leases
		(in thousands)
	2014	$	24
	2015		48
	2016		48
	2017		48
	2018		44
	Total	$	212

Accrued_Liabilities_Other_Tabl

Accrued Liabilities - Other (Tables)	6 Months Ended
	Jun. 30, 2014
Text Block [Abstract]	'
Accrued Liabilities - Other	'
	Accrued liabilities – other consist of the following:
		June 30,			December 31,
		2014			2013
		(in thousands)
	Taxes (other than income) and insurance	$	571		$	769
	Commissions		610			645
	Litigation and legal fees		187			121
	Other professional fees		403			624
	Environmental		8,166			4,589
	Warranty		1,281			1,145
	Deferred revenue		118			54
	Acquisition earn-out, current		56			107
	Other		2,642			2,205
	Accrued liabilities – other	$	14,034		$	10,259
Summary of Activity in Accrued Warranty and Service Liabilities	'
	The following is a summary of activity in accrued warranty and service liabilities:
		June 30, 2014
		(in thousands)
	Liability, beginning of year	$	1,145
	Expense for new warranties issued		516
	Warranty claims paid		(380	)
	Liability, end of period	$	1,281

Other_LongTerm_Liabilities_Tab

Other Long-Term Liabilities (Tables)	6 Months Ended
	Jun. 30, 2014
Other Liabilities Disclosure [Abstract]	'
Other Long-Term Liabilities	'
	Other long-term liabilities consist of the following:
		June 30,		December 31,
		2014		2013
		(in thousands)
	Environmental	$	11,247	$	17,200
	Unrecognized tax benefits, interest and penalties		638		934
	Long-term incentive plan		454		322
	Acquisition earn-out, long-term		—		9
	Other long-term liabilities	$	12,339	$	18,465

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Comparative Results of Segment Information	'
	The unaudited comparative results for the three and six month periods ended June 30, 2014 and June 30, 2013 are as follows:
			Three Months Ended						Six Months Ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in thousands)						(in thousands)
	Net sales
	SLPE		$	19,099		$	18,386		$	36,683		$	35,980
	High Power Group			22,452			17,607			42,762			34,700
	SL-MTI			10,118			9,060			20,970			18,154
	RFL			5,080			4,733			8,919			10,047
	Net sales		$	56,749		$	49,786		$	109,334		$	98,881
			Three Months Ended						Six Months Ended
			June 30,						June 30,
			2014			2013			2014			2013
			(in thousands)						(in thousands)
	Income from operations
	SLPE		$	2,293		$	1,131		$	3,232		$	2,181
	High Power Group			3,921			2,038			6,838			4,152
	SL-MTI			1,808			1,569			3,903			2,882
	RFL			479			393			440			1,329
	Unallocated Corporate Expenses (1)			(1,726	)		(1,500	)		(3,229	)		(2,927	)
	Income from operations		$	6,775		$	3,631		$	11,184		$	7,617
	-1	Unallocated Corporate Expenses includes corporate related items, financing activities and other costs not allocated to reportable segments, which includes but is not limited to certain legal, litigation and public reporting charges and certain legacy costs.
Total Assets by Segment	'
	Total assets as of June 30, 2014 and December 31, 2013 are as follows:
			June 30,			December 31,
			2014			2013
			(in thousands)
	Total assets
	SLPE		$	34,112		$	36,835
	High Power Group			32,997			29,506
	SL-MTI			15,423			14,601
	RFL			14,182			13,503
	Unallocated Corporate Assets			23,546			18,889
	Total assets		$	120,260		$	113,334
Goodwill and Other Intangible Assets, Net by Segment	'
	Goodwill and other intangible assets, net, as of June 30, 2014 and December 31, 2013 are as follows:
			June 30,			December 31,
			2014			2013
			(in thousands)
	Goodwill and other intangible assets, net
	SLPE		$	4,532		$	4,528
	High Power Group			9,982			9,976
	SL-MTI			90			106
	RFL			5,364			5,402
	Goodwill and other intangible assets, net		$	19,968		$	20,012

Fair_Value_Measurement_and_Fin1

Fair Value Measurement and Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	The following table presents the Company’s assets and liabilities measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013, aggregated by the level in the fair value hierarchy within which those measurements fall:
		Quoted Prices in Active		Significant Other		Significant Unobservable		Balance at
		Markets for Identical Assets		Observable		Inputs (Level 3)		June 30, 2014
		and Liabilities (Level 1)		Inputs (Level 2)
		(in thousands)
	Liabilities
	Derivative financial instruments	$	—	$	69	$	—	$	69
		Quoted Prices in Active		Significant Other		Significant Unobservable		Balance at
		Markets for Identical Assets		Observable		Inputs (Level 3)		December 31, 2013
		and Liabilities (Level 1)		Inputs (Level 2)
		(in thousands)
	Assets
	Available-for-sale securities	$	4,101	$	—	$	—	$	4,101
	Derivative financial instruments		—		152		—		152
	Total Assets	$	4,101	$	152	$	—	$	4,253

Derivative_Instruments_and_Hed1

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'
Notional Values of Company's Derivative Financial Instruments	'
	The notional amounts are used to measure the volume of foreign currency forward contracts and do not represent exposure to foreign currency losses. The following table summarizes the notional values of the Company’s derivative financial instruments as of June 30, 2014.
	Product	Number of Instruments		Notional
				(in thousands)
	Mexican Peso (MXN) Forward Contracts		17	MXN	86,632
	Chinese Yuan (CNH) Forward Contracts		18	CNH	93,019
Gain or Loss Recognized on Foreign Currency Forward Contracts	'
	The following table details the location in the financial statements of the gain or loss recognized on foreign currency forward contracts that are marked to market for the three and six months ended June 30, 2014 and June 30, 2013:
				Three Months Ended					Three Months Ended
				June 30, 2014					June 30, 2013
	Derivatives Not Designated as Hedging	Location of Income (Loss)		Amount of Income			Location of Income (Loss)		Amount of Income
	Instruments	Recognized in Income on		(Loss) Recognized in			Recognized in Income on		(Loss) Recognized in
		Derivative		Income on Derivative			Derivative		Income on
									Derivative
				(in thousands)					(in thousands)
	Foreign Exchange Contracts		Other gain (loss), net	$	142			Other gain (loss), net	$	(301	)
				Six Months Ended					Six Months Ended
				30-Jun-14					30-Jun-13
	Derivatives Not Designated as Hedging	Location of Income (Loss)		Amount of Income			Location of Income (Loss)		Amount of Income
	Instruments	Recognized in Income on		(Loss) Recognized in			Recognized in Income on		(Loss) Recognized in
		Derivative		Income on Derivative			Derivative		Income on
									Derivative
				(in thousands)					(in thousands)
	Foreign Exchange Contracts		Other gain (loss), net	$	(221	)		Other gain (loss), net	$	(327	)

Restructuring_Costs_Tables

Restructuring Costs (Tables)	6 Months Ended
	Jun. 30, 2014
Restructuring And Related Activities [Abstract]	'
Schedule of Restructuring Costs	'
	Restructuring activity for the period ended June 30, 2014 was as follows:
		Accrual at		Charged to		Cash		Accrual at
		Beginning of		Earnings		Payments		June 30, 2014
		the Year
		(in thousands)
	2014 Plan
	Severance and other employee-related charges	$	—	$	463	$	453	$	10

Receivables_Receivables_Detail

Receivables - Receivables (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Receivables [Abstract]	'	'
Trade receivables	$34,482,000	$30,766,000
Less: allowance for doubtful accounts	-379,000	-581,000
Trade receivables, net	34,103,000	30,185,000
Recoverable income taxes	273,000	344,000
Other	500,000	236,000
Receivables, net	$34,876,000	$30,765,000

Inventories_Inventories_Detail

Inventories - Inventories (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]	'	'
Raw materials	$16,988,000	$16,198,000
Work in process	4,669,000	4,842,000
Finished goods	4,013,000	4,124,000
Gross inventory	25,670,000	25,164,000
Less: allowances	-2,594,000	-2,201,000
Inventories, net	$23,076,000	$22,963,000

Income_Per_Share_Additional_In

Income Per Share - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Anti-dilutive common share equivalents	13,000	0	11,000	0

Income_Per_Share_Computation_o

Income Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Basic net income available to common shareholders:	'	'	'	'
Net income available to common shareholders from continuing operations	$5,655,000	$2,252,000	$8,320,000	$5,236,000
Diluted net income available to common shareholders from continuing operations	$5,655,000	$2,252,000	$8,320,000	$5,236,000
Shares:	'	'	'	'
Basic weighted average number of common shares outstanding	4,138,000	4,157,000	4,133,000	4,148,000
Common shares assumed upon exercise of stock options	30,000	47,000	30,000	41,000
Diluted weighted average number of common shares outstanding	4,168,000	4,204,000	4,163,000	4,189,000
Basic net income (loss) per common share:	'	'	'	'
Income from continuing operations	$1.37	$0.54	$2.01	$1.26
(Loss) from discontinued operations (net of tax)	($0.03)	($0.06)	($0.06)	($0.11)
Net income	$1.34	$0.48	$1.95	$1.15
Diluted net income (loss) per common share:	'	'	'	'
Income from continuing operations	$1.36	$0.54	$2	$1.25
(Loss) from discontinued operations (net of tax)	($0.03)	($0.06)	($0.07)	($0.11)
Net income	$1.33	$0.48	$1.93	$1.14

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Mar. 31, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

12-May-14

Mar. 31, 2014

Mar. 31, 2014

12-May-14

Jun. 30, 2014

Jun. 30, 2014

9-May-13

Jun. 30, 2014

2014 Long Term Incentive Plan [Member]

2014 Long Term Incentive Plan [Member]

2014 Long Term Incentive Plan [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Incentive Stock Plan (2008 Plan) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Executive Officers [Member]

Key Executive [Member]

May 12, 2014 Director Restricted Stock [Member]

May 12, 2014 Director Restricted Stock [Member]

May 12, 2014 Director Restricted Stock [Member]

May 9, 2013 Director Restricted Stock [Member]

May 9, 2013 Director Restricted Stock [Member]

Officers

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock-based compensation

$225,000

$210,000

$334,000

$332,000

'

$31,000

'

$48,000

'

'

'

'

'

'

$54,000

'

'

'

Stock-based compensation cost, net of tax

150,000

148,000

221,000

241,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share based award vesting period

'

'

'

'

'

'

'3 years

'

'

'

'

'3 years

'3 years

'1 year

'

'

'

'

Grant date of award

'

'

'

'

'

'

3-Mar-14

'

'

'

'

'

'

'

'

12-May-14

'

'

Weighted average price of restricted stock

'

'

'

'

'

'

$26.24

'

'

'

'

'

'

$26.79

'

'

'

'

Maximum number of achievable RSUs

'

'

'

'

'

22,000

'

22,000

'

'

'

'

'

'

'

'

'

'

Total unrecognized compensation cost related to restricted stock units

'

'

'

'

'

369,000

'

369,000

'

'

'

'

'

'

348,000

348,000

'

'

Stock options granted

'

'

101,000

0

'

'

'

'

0

'

'

91,000

10,000

'

'

'

'

'

Number of officers entitled for granting of stock options

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

Options granted contractual term

'

'

'

'

'

'

'

'

'

'

'

'5 years

'10 years

'

'

'

'

'

Number of restricted shares awarded to each Director

'

'

'

'

'

'

'

'

'

'

'

'

'

3,000

'

'

3,000

'

Grant date of fully vested shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9-May-14

Shares granted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

Common stock shares authorized in Plan

'

'

'

'

'

'

'

'

'

'

500,000

'

'

'

'

'

'

'

Options outstanding

184,000

'

184,000

'

83,000

'

'

'

'

184,000

'

'

'

'

'

'

'

'

Shares available for grant

'

'

'

'

'

'

'

'

'

79,000

'

'

'

'

'

'

'

'

Option exercised

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total intrinsic value of options exercised

'

'

'

185,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total unrecognized compensation cost related to stock options

809,000

'

809,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-average period of total unrecognized compensation cost related to stock options

'

'

'2 years 8 months 12 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash received from option exercises

'

'

'

227,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax benefit realized for tax deduction from option exercises of the share-based payment

'

'

'

$70,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

StockBased_Compensation_Assump

Stock-Based Compensation - Assumptions and Weighted Average Fair Values (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Weighted average fair value of grants	$9
Valuation assumptions:	'
Expected dividend yield	0.00%
Expected volatility	47.62%
Expected life (in years)	'3 years 4 months 6 days
Risk-free interest rate	0.83%

StockBased_Compensation_Option

Stock-Based Compensation - Option Activity under Principal Option Plans (Detail) (USD $)	6 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'	'
Shares, Beginning Balance	83,000	'	'
Shares, Granted	101,000	0	'
Shares, Ending Balance	184,000	'	83,000
Shares, Exercisable	83,000	'	'
Weighted-Average Exercise Price, Beginning Balance	$11.99	'	'
Weighted-Average Exercise Price, Granted	$26.02	'	'
Weighted-Average Exercise Price, Ending Balance	$19.71	'	$11.99
Weighted-Average Exercise Price, Exercisable	$11.99	'	'
Weighted-Average Remaining Contractual Term, Outstanding	'4 years 1 month 6 days	'	'3 years 3 months 11 days
Weighted-Average Remaining Contractual Term, Exercisable	'2 years 9 months 15 days	'	'
Aggregate Intrinsic Value, Beginning Balance	$1,247	'	'
Aggregate Intrinsic Value, Ending Balance	1,616	'	1,247
Aggregate Intrinsic Value, Exercisable	$1,364	'	'

Income_Tax_Additional_Informat

Income Tax - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Taxes [Line Items]	'	'	'	'	'
Effective income tax rate from continuing operations	'	'	34.00%	27.00%	'
Additional benefits from state research and development	$61,000	$65,000	$122,000	$98,000	'
Additional benefits from federal research and development	'	196,000	'	496,000	'
Company's gross research and development tax credit carry forwards	1,165,000	'	1,165,000	'	'
Gross research and development tax credit indefinite carry forward	672,000	'	672,000	'	'
Gross unrecognized tax benefits, excluding interest and penalties	859,000	'	859,000	'	834,000
Uncertain tax positions reclassified against related deferred tax assets	347,000	'	347,000	'	'
Examination by IRS	'	'	'The Company has been examined by the Internal Revenue Service (the "IRS") through the calendar year 2010. State income tax statutes are generally open for periods back to and including the calendar year 2009	'	'
Gross unrecognized tax benefits balance, Minimum	0	'	0	'	'
Gross unrecognized tax benefits balance, Maximum	327,000	'	327,000	'	'
Liability for interest and penalties related to unrecognized tax benefits	126,000	'	126,000	'	100,000
Federal Tax [Member]	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'
Gross unrecognized tax benefits, excluding interest and penalties	512,000	'	512,000	'	'
State Tax [Member]	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'
Gross unrecognized tax benefits, excluding interest and penalties	347,000	'	347,000	'	'
Research Definite Carry Forward [Member]	'	'	'	'	'
Income Taxes [Line Items]	'	'	'	'	'
Company's research and development tax credit carry forwards	$493,000	'	$493,000	'	'
Period of company's gross research and development tax credit carry forward	'	'	'15 years	'	'
Expiration of company's gross research and development tax credit carry forward, Minimum	'	'	'2015	'	'
Expiration of company's gross research and development tax credit carry forward, Maximum	'	'	'2029	'	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Feb. 27, 2012
Goodwill And Intangible Assets Disclosure [Abstract]	'	'	'	'	'	'
Purchase price for assets purchased	'	'	'	'	'	$1,050,000
Amount of earn-out liabilities	'	'	'	'	'	294,000
Earn-out liability	56,000	'	56,000	'	116,000	'
Payments related to earn-out	'	'	74,000	88,000	'	'
Amortization expense for intangible assets	111,000	113,000	220,000	224,000	'	'
Amortization expense for software	$51,000	$37,000	$100,000	$73,000	'	'

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Other Intangibles [Line Items]	'	'
Finite-lived intangible assets, Gross Value	$7,593,000	$7,420,000
Finite-lived intangible assets, Accumulated Amortization	6,967,000	6,746,000
Finite-lived intangible assets, Net Value	626,000	674,000
Other intangible assets, Gross	9,265,000	9,092,000
Other intangible assets, net	2,298,000	2,346,000
Patents [Member]	'	'
Other Intangibles [Line Items]	'	'
Finite-lived intangible assets, Gross Value	1,475,000	1,302,000
Finite-lived intangible assets, Accumulated Amortization	1,216,000	1,212,000
Finite-lived intangible assets, Net Value	259,000	90,000
Amortizable Life (Years)	'14 years	'
Patents [Member] | Maximum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'20 years	'
Patents [Member] | Minimum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'5 years	'
Customer Relationships [Member]	'	'
Other Intangibles [Line Items]	'	'
Finite-lived intangible assets, Gross Value	3,868,000	3,868,000
Finite-lived intangible assets, Accumulated Amortization	3,616,000	3,436,000
Finite-lived intangible assets, Net Value	252,000	432,000
Customer Relationships [Member] | Maximum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'8 years	'
Customer Relationships [Member] | Minimum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'5 years	'
Developed Technology [Member]	'	'
Other Intangibles [Line Items]	'	'
Finite-lived intangible assets, Gross Value	1,700,000	1,700,000
Finite-lived intangible assets, Accumulated Amortization	1,700,000	1,700,000
Finite-lived intangible assets, Net Value	0	0
Developed Technology [Member] | Maximum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'6 years	'
Developed Technology [Member] | Minimum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'5 years	'
Licensing Fees [Member]	'	'
Other Intangibles [Line Items]	'	'
Finite-lived intangible assets, Gross Value	550,000	550,000
Finite-lived intangible assets, Accumulated Amortization	435,000	398,000
Finite-lived intangible assets, Net Value	115,000	152,000
Licensing Fees [Member] | Maximum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'10 years	'
Licensing Fees [Member] | Minimum [Member]	'	'
Other Intangibles [Line Items]	'	'
Amortizable Life (Years)	'5 years	'
Trademarks [Member]	'	'
Other Intangibles [Line Items]	'	'
Indefinite-lived intangible assets, Net Value	$1,672,000	$1,672,000

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Schedule of Intangible Assets (Parenthetical) (Detail) (Patents [Member], USD $)	6 Months Ended
	Jun. 30, 2014
Other Intangibles [Line Items]	'
Intangible assets purchased	$160,000
Intangible assets, useful life	'14 years
Maximum [Member]	'
Other Intangibles [Line Items]	'
Intangible assets, useful life	'20 years

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Estimated Future Amortization Expense for Intangible Assets Subject to Amortization (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'
2014	$425
2015	91
2016	72
2017	43
2018	$38

Goodwill_and_Intangible_Assets6

Goodwill and Intangible Assets - Components of Goodwill (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Goodwill [Line Items]	'	'
Goodwill, Gross Amount	$22,725,000	$22,721,000
Goodwill, Accumulated Impairment Losses	5,055,000	5,055,000
Goodwill, Net	17,670,000	17,666,000
SLPE [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Gross Amount	4,232,000	4,228,000
Goodwill, Accumulated Impairment Losses	0	0
Goodwill, Net	4,232,000	4,228,000
High Power Group [Member] | MTE Corporation [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Gross Amount	8,189,000	8,189,000
Goodwill, Accumulated Impairment Losses	0	0
Goodwill, Net	8,189,000	8,189,000
High Power Group [Member] | TEAL Electronics Corp. [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Gross Amount	5,055,000	5,055,000
Goodwill, Accumulated Impairment Losses	5,055,000	5,055,000
Goodwill, Net	0	0
RFL [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Gross Amount	5,249,000	5,249,000
Goodwill, Accumulated Impairment Losses	0	0
Goodwill, Net	$5,249,000	$5,249,000

Investments_Additional_Informa

Investments - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Investment [Line Items]	'	'	'	'
Proceeds from sale of available-for-sale securities	'	$4,054,000	'	'
Gross realized gains on available-for-sale securities	1,585,000	1,691,000	'	'
Net realized gains on available-for-sale securities	997,000	1,063,000	'	'
Available-for-sale securities	'	'	$4,101,000	$0
Maximum [Member]	'	'	'	'
Investment [Line Items]	'	'	'	'
Percentage of equity interests on investments in publicly traded equity securities	20.00%	20.00%	'	'

Investments_Schedule_of_Availa

Investments - Schedule of Available-for-Sale Securities (Detail) (USD $)	Dec. 31, 2013	Jun. 30, 2013	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified			Common Stock [Member]	Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'
Cost	'	'	$0	$2,362
Gains in Accumulated Other Comprehensive Income	'	'	0	1,739
Estimated Fair Value	$4,101	$0	$0	$4,101

Debt_Schedule_of_Debt_Detail

Debt - Schedule of Debt (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]	'	'
$40 million variable interest rate senior revolving credit facility maturing in 2016	$0	$1,000,000
Other capital leases with maturities through 2018	212,000	235,000
Total debt	212,000	1,235,000
Less current portion	-48,000	-1,048,000
Total long-term portion	164,000	187,000
Total debt	$212,000	$1,235,000

Debt_Schedule_of_Debt_Parenthe

Debt - Schedule of Debt (Parenthetical) (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Revolving credit facility, borrowing capacity	$40
Revolving credit facility, maturity date	9-Aug-16
Other capital leases, maturity period	'2018

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Aug. 09, 2012

Aug. 09, 2012

Jun. 30, 2014

20-May-14

28-May-13

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Aug. 09, 2012

Jun. 30, 2014

Jun. 30, 2014

2012 Credit Facility [Member]

2012 Credit Facility [Member]

2012 Credit Facility [Member]

2012 Credit Facility [Member]

2012 Credit Facility [Member]

2012 Credit Facility [Member]

2012 Credit Facility [Member]

2012 Credit Facility [Member]

2012 Credit Facility [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

PNC Bank, National Association (PNC Bank) [Member]

PNC Bank, National Association (PNC Bank) [Member]

PNC Bank, National Association (PNC Bank) [Member]

Standby Letters of Credit Due May 28, 2014 [Member]

Standby Letters of Credit Due May 28, 2014 [Member]

Standby Letters of Credit Due May 28, 2014 [Member]

Standby Letters of Credit Due May 28, 2015 [Member]

London Interbank Offered Rate (LIBOR) [Member]

Base Rate [Member]

Federal Funds Open Rate [Member]

Daily Libor Rate [Member]

2012 Credit Facility [Member]

London Interbank Offered Rate (LIBOR) [Member]

Base Rate [Member]

Letter of Credit [Member]

PNC Bank, National Association (PNC Bank) [Member]

Line of Credit Facility [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowings

$40,000,000

'

'

'

'

$40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowings under certain conditions

'

'

'

'

'

70,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Standby and commercial letter of credit sublimit

'

'

'

'

'

5,000,000

10,700,000

'

'

'

'

'

'

'

'

25,000,000

'

'

Maturity date of expiration

9-Aug-16

'

'

'

9-Aug-16

'

'

'

'

'

28-May-15

'

'

'

'

'

'

'

Letter of credit, expiration period from the date of closing

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

Margin rate range

'

'

'

'

'

'

'

'

'

'

'

2.00%

1.00%

0.50%

1.00%

'

1.25%

0.25%

Balance of letter of credit under Credit Facility

'

'

'

'

'

'

'

6,423,000

'

8,564,000

'

'

'

'

'

'

'

'

Annual commitment fee

'

'

'

'

'

'

'

0.13%

'

'

'

'

'

'

'

'

'

'

Standby commission

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

'

Payment related to obligation

'

'

'

'

'

'

'

'

2,141,000

'

'

'

'

'

'

'

'

'

Credit availability under Credit Facility

'

'

39,527,000

38,526,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance under the Credit Facility

$0

$1,000,000

$0

$1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt_Summary_of_Aggregate_Matu

Debt - Summary of Aggregate Maturities on All Long-Term Debt (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Capital Leases, 2014	$24	'
Capital Leases, 2015	48	'
Capital Leases, 2016	48	'
Capital Leases, 2017	48	'
Capital Leases, 2018	44	'
Capital Leases, Total	$212	$235

Accrued_Liabilities_Other_Accr

Accrued Liabilities - Other - Accrued Liabilities - Other (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Payables And Accruals [Abstract]	'	'
Taxes (other than income) and insurance	$571,000	$769,000
Commissions	610,000	645,000
Litigation and legal fees	187,000	121,000
Other professional fees	403,000	624,000
Environmental	8,166,000	4,589,000
Warranty	1,281,000	1,145,000
Deferred revenue	118,000	54,000
Acquisition earn-out, current	56,000	107,000
Other	2,642,000	2,205,000
Accrued liabilities - other	$14,034,000	$10,259,000

Accrued_Liabilities_Other_Summ

Accrued Liabilities - Other - Summary of Activity in Accrued Warranty and Service Liabilities (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Payables And Accruals [Abstract]	'
Liability, beginning of year	$1,145
Expense for new warranties issued	516
Warranty claims paid	-380
Liability, end of period	$1,281

Other_LongTerm_Liabilities_Oth

Other Long-Term Liabilities - Other Long-Term Liabilities (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]	'	'
Environmental	$11,247,000	$17,200,000
Unrecognized tax benefits, interest and penalties	638,000	934,000
Long-term incentive plan	454,000	322,000
Acquisition earn-out, long-term	'	9,000
Other long-term liabilities	$12,339,000	$18,465,000

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	6 Months Ended		0 Months Ended	6 Months Ended			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Feb. 13, 2013	Jun. 30, 2014	20-May-14	10-May-13	Jun. 30, 2014
	Operable_Unit		Pennsauken Site (OU-1 and OU-2) [Member]	Pennsauken Site (OU-1 and OU-2) [Member]	Pennsauken Site (OU-1 and OU-2) [Member]	Pennsauken Site (OU-1 and OU-2) [Member]	SurfTech [Member]
							site
Contingencies And Commitments [Line Items]	'	'	'	'	'	'	'
Number of operable units	2	'	'	'	'	'	'
Payment for past cost as per agreement installment amount	'	'	'	$2,141,000	'	'	'
Payment for past cost as per agreement aggregate amount	'	'	'	10,705,000	'	'	'
Payment related to obligation	'	'	'	'	2,211,000	2,185,000	'
Description of payment period	'	'	'	'The next three payments will be made on the anniversary of the first payment plus ten days	'	'	'
State of NJ total claim for certain costs	'	'	'	1,800,000	'	'	'
State of NJ total claim for past and future cleanup costs	'	'	'	1,300,000	'	'	'
State of NJ total claim for natural resource damages	'	'	'	500,000	'	'	'
Company offer to resolve State of NJ claim	'	'	250,000	'	'	'	'
Total environmental accruals	19,413,000	21,789,000	'	'	'	'	'
Environmental accrual, long-term portion	$11,247,000	$17,200,000	'	'	'	'	'
Number of sites	'	'	'	'	'	'	3
Number of sites owned by the Company	'	'	'	'	'	'	2

Segment_Information_Additional

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
	Segment
Segment Reporting [Abstract]	'
Number of business segments	4

Segment_Information_Comparativ

Segment Information - Comparative Results of Segment Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net sales	'	'	'	'
Net sales	$56,749,000	$49,786,000	$109,334,000	$98,881,000
Income from operations	'	'	'	'
Income from operations	6,775,000	3,631,000	11,184,000	7,617,000
SLPE [Member]	'	'	'	'
Net sales	'	'	'	'
Net sales	19,099,000	18,386,000	36,683,000	35,980,000
High Power Group [Member]	'	'	'	'
Net sales	'	'	'	'
Net sales	22,452,000	17,607,000	42,762,000	34,700,000
SL-MTI [Member]	'	'	'	'
Net sales	'	'	'	'
Net sales	10,118,000	9,060,000	20,970,000	18,154,000
RFL [Member]	'	'	'	'
Net sales	'	'	'	'
Net sales	5,080,000	4,733,000	8,919,000	10,047,000
Operating Segments [Member] | SLPE [Member]	'	'	'	'
Income from operations	'	'	'	'
Income from operations	2,293,000	1,131,000	3,232,000	2,181,000
Operating Segments [Member] | High Power Group [Member]	'	'	'	'
Income from operations	'	'	'	'
Income from operations	3,921,000	2,038,000	6,838,000	4,152,000
Operating Segments [Member] | SL-MTI [Member]	'	'	'	'
Income from operations	'	'	'	'
Income from operations	1,808,000	1,569,000	3,903,000	2,882,000
Operating Segments [Member] | RFL [Member]	'	'	'	'
Income from operations	'	'	'	'
Income from operations	479,000	393,000	440,000	1,329,000
Unallocated Corporate [Member]	'	'	'	'
Income from operations	'	'	'	'
Income from operations	($1,726,000)	($1,500,000)	($3,229,000)	($2,927,000)

Segment_Information_Total_Asse

Segment Information - Total Assets by Segment (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Total assets	'	'
Total assets	$120,260,000	$113,334,000
Operating Segments [Member] | SLPE [Member]	'	'
Total assets	'	'
Total assets	34,112,000	36,835,000
Operating Segments [Member] | High Power Group [Member]	'	'
Total assets	'	'
Total assets	32,997,000	29,506,000
Operating Segments [Member] | SL-MTI [Member]	'	'
Total assets	'	'
Total assets	15,423,000	14,601,000
Operating Segments [Member] | RFL [Member]	'	'
Total assets	'	'
Total assets	14,182,000	13,503,000
Unallocated Corporate [Member]	'	'
Total assets	'	'
Total assets	$23,546,000	$18,889,000

Segment_Information_Goodwill_a

Segment Information - Goodwill and Other Intangible Assets, Net by Segment (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill and other intangible assets, net	'	'
Goodwill and other intangible assets, net	$19,968	$20,012
SLPE [Member]	'	'
Goodwill and other intangible assets, net	'	'
Goodwill and other intangible assets, net	4,532	4,528
High Power Group [Member]	'	'
Goodwill and other intangible assets, net	'	'
Goodwill and other intangible assets, net	9,982	9,976
SL-MTI [Member]	'	'
Goodwill and other intangible assets, net	'	'
Goodwill and other intangible assets, net	90	106
RFL [Member]	'	'
Goodwill and other intangible assets, net	'	'
Goodwill and other intangible assets, net	$5,364	$5,402

Retirement_Plans_and_Deferred_1

Retirement Plans and Deferred Compensation - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'	'
Costs incurred under defined contribution pension plan	$153,000	$150,000	$382,000	$337,000
Amount charged to expenses in connection with agreements for supplemental benefits plans	$87,000	$90,000	$151,000	$132,000
Minimum [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'	'
Discount rates for supplemental retirement benefits plans	'	'	6.00%	'
Maximum [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'	'
Discount rates for supplemental retirement benefits plans	'	'	12.00%	'

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
	site
Discontinued Operations And Disposal Groups [Abstract]	'	'	'	'
(Loss) income from discontinued operations before income taxes	$210,000	$390,000	$436,000	$748,000
(Loss) from discontinued operations, net of tax	($127,000)	($237,000)	($265,000)	($455,000)
Number of environmental sites	5	'	'	'

Fair_Value_Measurement_and_Fin2

Fair Value Measurement and Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
In Thousands, unless otherwise specified
Liabilities	'	'	'
Derivative financial instruments	$69	'	'
Assets	'	'	'
Available-for-sale securities	'	4,101	0
Derivative financial instruments	'	152	'
Total Assets	'	4,253	'
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member]	'	'	'
Assets	'	'	'
Available-for-sale securities	'	4,101	'
Total Assets	'	4,101	'
Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Liabilities	'	'	'
Derivative financial instruments	69	'	'
Assets	'	'	'
Derivative financial instruments	'	152	'
Total Assets	'	$152	'

Derivative_Instruments_and_Hed2

Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Derivative Instruments And Hedging Activities Disclosure [Abstract]	'	'
Fair value of the foreign currency forward contracts, (liability) assets	($69,000)	$152,000

Derivative_Instruments_and_Hed3

Derivative Instruments and Hedging Activities - Notional Values of Company's Derivative Financial Instruments (Detail) (Not Designated as Hedging Instrument [Member])	Jun. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified	Mexican Peso (MXN) Forward Contracts [Member]	Chinese Yuan (CNH) Forward Contracts [Member]
	MXN	CNY
	Instruments	Instruments
Derivative [Line Items]	'	'
Number of Foreign Currency Forward Contracts Held	17	18
Notional Amount of Foreign Currency Forward Contracts	86,632	93,019

Derivative_Instruments_and_Hed4

Derivative Instruments and Hedging Activities - Gain or Loss Recognized on Foreign Currency Forward Contracts (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Amount of Income (Loss) Recognized in Income on Derivative	'	'	($221,000)	($327,000)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Other Gain (Loss), Net [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Amount of Income (Loss) Recognized in Income on Derivative	$142,000	($301,000)	($221,000)	($327,000)

Other_Gain_Loss_Net_Additional

Other Gain (Loss), Net - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
Other Income And Expenses [Abstract]	'	'	'
Gross realized gains on available-for-sale securities	$1,585,000	$1,691,000	'
Dividend income from available-for-sale securities	'	9,000	'
Loss on foreign exchange contracts	'	$221,000	$327,000

Foreign_Operations_Additional_

Foreign Operations - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013
Foreign Operations [Abstract]	'	'	'
Initiation date of manufacturing work stoppage	7-Mar-13	'	'
End date of manufacturing work stoppage	20-Mar-13	'	'
Adverse impact of work stoppage on revenues	$900,000	'	'
Incremental costs of work stoppage	'	$0	$535,000

Shareholders_Equity_Additional

Shareholders' Equity - Additional Information (Detail) (2010 Repurchase Plan [Member], USD $)	6 Months Ended
	Jun. 30, 2014	Nov. 16, 2010
2010 Repurchase Plan [Member]	'	'
Equity, Class of Treasury Stock [Line Items]	'	'
Stock Repurchase Program, number of shares authorized to be repurchased	'	470,000
Repurchase of common stock number of shares purchased	4,000	'
Treasury stock acquired, average cost per share	$24.68	'
Stock Repurchase Program, remaining number of shares authorized to be repurchased	239,000	'

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Management Services Agreement, effective date	1-May-14
Management Services Agreement, monthly fee	10,400
Management Services Agreement, term	'1 year

Restructuring_Costs_Schedule_o

Restructuring Costs - Schedule of Restructuring Costs (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Restructuring Cost and Reserve [Line Items]	'
Charged to Earnings	$463,000
Restructuring Plan 2014 [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Accrual beginning balance	0
Charged to Earnings	463,000
Cash Payments	453,000
Accrual ending balance	$10,000

Restructuring_Costs_Additional

Restructuring Costs - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Mar. 31, 2014	Jun. 30, 2014
	Employees
Restructuring Cost and Reserve [Line Items]	'	'
Consolidated charge to earnings	'	$463,000
Restructuring Plan 2014 [Member]	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Consolidated charge to earnings	'	$463,000
Number of employees terminated by the restructuring plan	11	'
The total number of employees affected by the restructuring plan	11	'

Subsequent_Event_Additional_In

Subsequent Event - Additional Information (Detail) (USD $)	Feb. 27, 2012	Jun. 30, 2014	Jul. 25, 2014
		Subsequent Event [Member]	Subsequent Event [Member]
		Dynetic Systems [Member]	Dynetic Systems [Member]
Subsequent Event [Line Items]	'	'	'
Purchase price of assets acquired and liabilities assumed	$1,050,000	'	$4,000,000
Business acquisition, date of agreement	'	25-Jul-14	'
Earn-out provision closing date	'	31-Dec-17	'