10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2014

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     

Commission File Number 0-18277

VICOR CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	04-2742817
(State of Incorporation)	(I.R.S. Employer Identification No.)

25 Frontage Road, Andover, Massachusetts 01810

(Address of Principal Executive Office)

(978) 470-2900

(Registrant’s telephone number)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on it corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files.)    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	¨	Accelerated filer	x
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The number of shares outstanding of each of the issuer’s classes of Common Stock as of June 30, 2014 was:

Common Stock, $.01 par value	26,785,123
Class B Common Stock, $.01 par value	11,758,218

VICOR CORPORATION

INDEX TO FORM 10-Q

	Page
Part I — Financial Information:
Item 1 - Financial Statements (Unaudited)
Condensed Consolidated Balance Sheets at June 30, 2014 and December 31, 2013		1
Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2014 and 2013		2
Condensed Consolidated Statements of Comprehensive Income (Loss) for the three and six months ended June  30, 2014 and 2013		3
Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2014 and 2013		4
Notes to Condensed Consolidated Financial Statements		5
Item 2 - Management’s Discussion and Analysis of Financial Condition and Results of Operations		17
Item 3 - Quantitative and Qualitative Disclosures About Market Risk		27
Item 4 - Controls and Procedures		27
Part II — Other Information:
Item 1 - Legal Proceedings		29
Item 1A – Risk Factors		29
Item 2 - Unregistered Sales of Equity Securities and Use of Proceeds		29
Item 6 – Exhibits		29
Signature(s)		30
EX-31.1 SECTION 302 CERTIFICATION OF CEO
EX-31.2 SECTION 302 CERTIFICATION OF CFO
EX-32.1 SECTION 906 CERTIFICATION OF CEO
EX-32.2 SECTION 906 CERTIFICATION OF CFO

VICOR CORPORATION

Condensed Consolidated Balance Sheets

(In thousands)

(Unaudited)

Item 1. Financial Statements

	June 30, 2014			December 31, 2013
Assets
Current assets:
Cash and cash equivalents	$	50,805		$	56,339
Short-term investments		642			463
Accounts receivable, less allowance of $190 in 2014 and $198 in 2013		27,069			27,683
Inventories, net		29,228			29,696
Deferred tax assets		131			131
Other current assets		4,948			4,212
Total current assets		112,823			118,524
Long-term investments, net		4,995			5,188
Property, plant and equipment, net		38,670			40,092
Other assets		1,786			1,836
Total assets	$	158,274		$	165,640
Liabilities and Equity
Current liabilities:
Accounts payable	$	9,221		$	8,677
Accrued compensation and benefits		8,780			8,104
Accrued expenses		3,586			2,841
Income taxes payable		5			15
Deferred revenue		1,259			1,018
Total current liabilities		22,851			20,655
Long-term deferred revenue		768			974
Long-term income taxes payable		1,346			1,339
Deferred income taxes payable		335			335
Total liabilities		25,300			23,303
Commitments and contingencies (Note 10)
Equity:
Vicor Corporation stockholders’ equity:
Class B Common Stock		118			118
Common Stock		392			392
Additional paid-in capital		170,265			169,474
Retained earnings		98,432			108,645
Accumulated other comprehensive loss		(332	)		(526	)
Treasury stock, at cost		(138,927	)		(138,927	)
Total Vicor Corporation stockholders’ equity		129,948			139,176
Noncontrolling interest		3,026			3,161
Total equity		132,974			142,337
Total liabilities and equity	$	158,274		$	165,640

See accompanying notes.

-1-

VICOR CORPORATION

Condensed Consolidated Statements of Operations

(In thousands, except per share amounts)

(Unaudited)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Net revenues	$	53,361		$	46,865		$	106,594		$	88,811
Cost of revenues		30,699			28,404			61,140			53,743
Gross margin		22,662			18,461			45,454			35,068
Operating expenses:
Selling, general and administrative		17,033			15,455			35,013			29,342
Research and development		10,643			9,988			20,894			19,843
Severance charges		—			—			—			1,361
Total operating expenses		27,676			25,443			55,907			50,546
Loss from operations		(5,014	)		(6,982	)		(10,453	)		(15,478	)
Other income, net:
Total unrealized gains (losses) on available-for-sale securities, net		40			(14	)		79			38
Portion of gains recognized in other comprehensive income (loss)		(20	)		(66	)		(59	)		(117	)
Net credit gains (losses) recognized in earnings		20			(80	)		20			(79	)
Other income, net		62			26			92			40
Total other income, net		82			(54	)		112			(39	)
Loss before income taxes		(4,932	)		(7,036	)		(10,341	)		(15,517	)
Provision (benefit) for income taxes		—			(2,436	)		17			(5,931	)
Consolidated net loss		(4,932	)		(4,600	)		(10,358	)		(9,586	)
Less: Net income (loss) attributable to noncontrolling interest		(97	)		16			(145	)		20
Net loss attributable to Vicor Corporation	$	(4,835	)	$	(4,616	)	$	(10,213	)	$	(9,606	)
Net loss per common share attributable to Vicor Corporation:
Basic	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)
Diluted	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)
Shares used to compute net loss per share attributable to Vicor Corporation:
Basic		38,542			38,538			38,541			39,852
Diluted		38,542			38,538			38,541			39,852

See accompanying notes.

-2-

VICOR CORPORATION

Condensed Consolidated Statements of Comprehensive Income (Loss)

(In thousands)

(Unaudited)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Consolidated net loss	$	(4,932	)	$	(4,600	)	$	(10,358	)	$	(9,586	)
Foreign currency translation gains (losses), net of tax provision (benefit) (1)		71			(135	)		148			(403	)
Unrealized gains on available-for-sale securities, net of tax (2)		19			64			56			115
Other comprehensive income (loss)		90			(71	)		204			(288	)
Consolidated comprehensive loss		(4,842	)		(4,671	)		(10,154	)		(9,874	)
Less: Comprehensive loss attributable to noncontrolling interest		(92	)		(1	)		(135	)		(25	)
Comprehensive loss attributable to Vicor Corporation	$	(4,750	)	$	(4,670	)	$	(10,019	)	$	(9,849	)

(1) Net of tax benefit of $0 and $76 for the three months ended June 30, 2014 and 2013, respectively. Net of tax benefit of $0 and $217 for the six months ended June 30, 2014 and 2013, respectively.

(2) The deferred tax assets associated with the unrealized gains on available-for-sale securities are completely offset by a tax valuation allowance as of June 30, 2014 and 2013. Therefore, there is no net income tax provision (benefit) recognized for the three and six months ended June 30, 2014 and 2013.

See accompanying notes.

-3-

VICOR CORPORATION

Condensed Consolidated Statements of Cash Flows

(In thousands)

(Unaudited)

	Six Months Ended
	June 30,
	2014			2013
Operating activities:
Consolidated net loss	$	(10,358	)	$	(9,586	)
Adjustments to reconcile consolidated net loss to net cash provided by (used for) operating activities:
Depreciation and amortization		4,854			5,028
Stock-based compensation expense		771			1,402
Provision for doubtful accounts		11			190
Decrease in long-term deferred revenue		(69	)		(71	)
Deferred income taxes		—			(4,307	)
Severance charges		—			1,361
Excess tax benefit of stock-based compensation		—			(53	)
Gain on disposal of equipment		(6	)		(3	)
Credit (gain) loss on available-for-sale securities		(20	)		79
Increase in long-term income taxes payable		7			21
Change in current assets and liabilities, net		2,589			1,723
Net cash used for operating activities		(2,221	)		(4,216	)
Investing activities:
Additions to property, plant and equipment		(3,481	)		(2,543	)
Sales and maturities of investments		90			334
Proceeds from sale of equipment		6			3
(Increase) decrease in other assets		(32	)		57
Net cash used for investing activities		(3,417	)		(2,149	)
Financing activities:
Proceeds from issuance of Common Stock		20			55
Purchases of Common Stock		—			(17,100	)
Excess tax benefit of stock-based compensation		—			53
Net cash provided by (used for) financing activities		20			(16,992	)
Effect of foreign exchange rates on cash		84			(419	)
Net decrease in cash and cash equivalents		(5,534	)		(23,776	)
Cash and cash equivalents at beginning of period		56,339			84,554
Cash and cash equivalents at end of period	$	50,805		$	60,778

See accompanying notes.

-4-

VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

1. Basis of Presentation

The accompanying unaudited condensed consolidated financial statements of Vicor Corporation (the “Company”) have been prepared in accordance with generally accepted accounting principles for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, these interim financial statements do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.

In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for any other interim period or the year ending December 31, 2014. The balance sheet at December 31, 2013 presented herein has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. For further information, refer to the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 (File No. 0-18277) filed by the Company with the Securities and Exchange Commission.

2. Short-Term and Long-Term Investments

As of June 30, 2014, the Company held auction rate securities that had experienced failed auctions totaling $6,000,000 at par value, all of which had been purchased through and are held by a broker-dealer affiliate of Bank of America, N.A. (the “Failed Auction Securities”). The Failed Auction Securities held by the Company are Aaa/AA+/A3/BBB rated by major credit rating agencies, collateralized by student loans, and guaranteed by the U.S. Department of Education under the Federal Family Education Loan Program. Management is not aware of any reason to believe any of the issuers of the Failed Auction Securities are presently at risk of default. Through June 30, 2014, the Company has continued to receive interest payments on the Failed Auction Securities in accordance with the terms of their respective indentures. Management believes the Company ultimately should be able to liquidate all of the Failed Auction Securities without significant loss primarily due to the overall quality of the issues held and the collateral securing the substantial majority of the underlying obligations. However, current conditions in the auction rate securities market have led management to conclude the recovery period for the Failed Auction Securities exceeds 12 months. As a result, the Company continued to classify the Failed Auction Securities as long-term as of June 30, 2014.

The following is a summary of available-for-sale securities (in thousands):

			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
June 30, 2014	Cost		Gains		Losses		Value
Failed Auction Securities	$	6,000	$	—	$	1,096	$	4,904
Brokered certificates of deposit		730		3		—		733
	$	6,730	$	3	$	1,096	$	5,637
			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
December 31, 2013	Cost		Gains		Losses		Value
Failed Auction Securities	$	6,000	$	—	$	1,175	$	4,825
Brokered certificates of deposit		820		6		—		826
	$	6,820	$	6	$	1,175	$	5,651

All of the Failed Auction Securities as of June 30, 2014 have been in an unrealized loss position for greater than 12 months.

-5-

VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

The amortized cost and estimated fair value of available-for-sale securities on June 30, 2014, by contractual maturities, are shown below (in thousands):

			Estimated
	Cost		Fair Value
Due in one year or less	$	640	$	642
Due in two to ten years		90		91
Due in ten to twenty years		—		—
Due in twenty to forty years		6,000		4,904
	$	6,730	$	5,637

Based on the fair value measurements described in Note 3, the fair value of the Failed Auction Securities on June 30, 2014, with a par value of $6,000,000, was estimated by the Company to be approximately $4,904,000, an increase in fair value of $79,000 from December 31, 2013. The gross unrealized loss of $1,096,000 on the Failed Auction Securities consists of two types of estimated loss: an aggregate credit loss of $375,000 and an aggregate temporary impairment of $721,000. In determining the amount of credit loss, the Company compared the present value of cash flows expected to be collected to the amortized cost basis of the securities, considering credit default risk probabilities and changes in credit ratings as significant inputs, among other factors (See Note 3).

The following table represents a rollforward of the activity related to the credit (gain) loss recognized in earnings on available-for-sale auction rate securities held by the Company for the six months ended June 30 (in thousands):

	2014			2013
Balance at the beginning of the period	$	395		$	317
Changes in the amount related to credit (gain) loss for which other-than- temporary impairment was not previously recognized		(20	)		86
Reduction for security sold during the period		—			(7	)
Balance at the end of the period	$	375		$	396

At this time, the Company has no intent to sell any of the impaired Failed Auction Securities and does not believe it is more likely than not the Company will be required to sell any of these securities. If current market conditions deteriorate further, the Company may be required to record additional unrealized losses. If the credit rating of the security deteriorates, the Company may be required to adjust the carrying value of these investments through impairment charges recorded in the Condensed Consolidated Statement of Operations, and any such impairment adjustments may be material.

Based on the Company’s ability to access cash and cash equivalents and its expected operating cash flows, management does not anticipate the current lack of liquidity associated with the Failed Auction Securities held will affect the Company’s ability to execute its current operating plan.

-6-

VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

3. Fair Value Measurements

The Company accounts for certain financial assets at fair value, defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions market participants would use in pricing an asset or liability. A three-level hierarchy is used to show the extent and level of judgment used to estimate fair value measurements.

Assets measured at fair value on a recurring basis include the following as of June 30, 2014 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of June 30, 2014
Cash Equivalents:
Money market funds	$	12,041	$	—	$	—	$	12,041
Short-term investments:
Brokered certificates of deposit		—		642		—		642
Long-term investments:
Failed Auction Securities		—		—		4,904		4,904
Brokered certificates of deposit		—		91		—		91

Assets measured at fair value on a recurring basis include the following as of December 31, 2013 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of December 31, 2013
Cash Equivalents:
Money market funds	$	12,407	$	—	$	—	$	12,407
Short-term investments:
Brokered certificates of deposit		—		463		—		463
Long-term investments:
Failed Auction Securities		—		—		4,825		4,825
Brokered certificates of deposit		—		363		—		363

The Company has brokered certificates of deposit classified as Level 2 because the fair value for these investments has been determined utilizing observable inputs from non-active markets. The fair values fluctuate with changes in market interest rates obtained from information available in publicly quoted markets. Management tested the reported fair values by comparing them to net present value calculations utilizing a discount rate based on U.S. Treasury bill and bond yields for similar maturities.

-7-

VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

As of June 30, 2014, there was insufficient observable auction rate security market information available to determine the fair value of the Failed Auction Securities using Level 1 or Level 2 inputs. As such, the Company’s investments in Failed Auction Securities were deemed to require valuation using Level 3 inputs. Management, after consulting with advisors, valued the Failed Auction Securities using analyses and pricing models similar to those used by market participants (i.e., buyers, sellers, and the broker-dealers responsible for execution of the Dutch auction pricing mechanism by which each issue’s interest rate was set). Management utilized a probability weighted discounted cash flow (“DCF”) model to determine the estimated fair value of these securities as of June 30, 2014. The major assumptions used in preparing the DCF model included: estimates for the amount and timing of future interest and principal payments based on default probability assumptions used to measure the credit loss of 6.3%; the rate of return required by investors to own these securities in the current environment, which management estimates to be 5.0% above the risk free rate of return; and an estimated timeframe of three to five years for successful auctions for these securities to occur. In making these assumptions, management considered relevant factors including: the formula applicable to each security defining the interest rate paid to investors in the event of a failed auction (the “Penalty Rate”); forward projections of the interest rate benchmarks specified in such formulas; the likely timing of principal repayments; the probability of full repayment considering the guarantees by the U.S. Department of Education of the underlying student loans, guarantees by other third parties, and additional credit enhancements provided through other means; and publicly available pricing data for recently issued student loan asset-backed securities not subject to auctions. In developing its estimate of the rate of return required by investors to own these securities, management compared the Penalty Rates of the Failed Auction Securities with yields of actively traded long-term bonds with similar characteristics and, reflecting the limited liquidity for auction rate securities and the discounts to par value seen in recent tender offers by issuers and arms’ length market transactions between informed buyers and sellers, estimated the implied yield (i.e., the discount to par value) necessary to complete a sale of the Failed Auction Securities. Management has calculated an increase or decrease in the liquidity risk premium of 5.0% referenced above of 1.0% (i.e., 100 basis points) as used in the model, would decrease or increase, respectively, the fair value of the Failed Auction Securities by approximately $400,000.

For purposes of the valuation process for the Failed Auction Securities, “management” consists of senior members of the Company’s finance department. The fair value measurements for the Failed Auction Securities are reviewed and updated on a quarterly basis. The calculations are prepared by the Company’s Corporate Controller, in conjunction with information provided by its valuation advisors, and include the development and substantiation of the unobservable inputs. The methodology, assumptions, and calculations are reviewed and approved by the Company’s Chief Financial Officer and Chief Accounting Officer.

The significant unobservable inputs used in the fair value measurement of the Company’s Failed Auction Securities are the cumulative probability of earning the maximum rate until maturity, the cumulative probability of principal return prior to maturity, the cumulative probability of default, the liquidity risk premium, and the recovery rate in default. Significant increases (decreases) in any of those inputs in isolation would result in changes in fair value measurement. Significant increases (decreases) in the cumulative probability of earning the maximum rate until maturity, the cumulative probability of principal return prior to maturity, and the recovery rate in default would result in a higher (lower) fair value measurement, while increases (decreases) in the cumulative probability of default and the liquidity risk premium would result in a lower (higher) fair value measurement.

Generally, the interrelationships are such that a change in the assumption used for the cumulative probability of principal return prior to maturity is accompanied by a directionally similar change in the assumption used for the cumulative probability of earning the maximum rate until maturity and a directionally opposite change in the assumptions used for the cumulative probability of default and the liquidity risk premium. The recovery rate in default is somewhat independent and based upon the securities’ specific underlying assets and published recovery rate indices.

-8-

VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

Quantitative information about Level 3 fair value measurements as of June 30, 2014 are as follows (dollars in thousands):

				Range
		Valuation	Unobservable	(Weighted
	Fair Value	Technique	Input	Average)
Failed Auction Securities	$4,904	Discounted cash flow	Cumulative probability of earning the maximum rate until maturity	0.01% - 0.07% (0.04%)
			Cumulative probability of principal return prior to maturity	72.02% - 94.82% (83.42%)
			Cumulative probability of default	5.17% - 27.92% (16.55%)
			Liquidity risk premium	5.00% - 5.00% (5.00%)
			Recovery rate in default	40.00% - 40.00% (40.00%)

The following table summarizes the change in the estimated fair values calculated for those assets valued on a recurring basis utilizing Level 3 inputs (i.e., the Failed Auction Securities) for the six months ended June 30, 2014 (in thousands):

Balance at the beginning of the period	$	4,825
Credit gain on available-for-securities included in Other income, net		20
Unrealized gain included in Other comprehensive income (loss)		59
Balance at the end of the period	$	4,904

There were no transfers between Level 1 and Level 2 of the fair value hierarchy during the six months ended June 30, 2014.

4. Stock-Based Compensation

The Company uses the Black-Scholes option pricing model to calculate the fair value of stock option awards as of their grant date. Stock-based compensation expense for the three and six months ended June 30 was as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Cost of revenues	$	64	$	40	$	100	$	44
Selling, general and administrative		373		998		564		1,181
Research and development		100		101		107		177
Total stock-based compensation	$	537	$	1,139	$	771	$	1,402

Stock-based compensation was lower during the three and six months ended June 30, 2014, compared to the same periods in 2013, due to the completion of an exchange of outstanding employee stock options in the second quarter of 2013.

On December 31, 2010, the Company granted 2,984,250 non-qualified stock options under the VI Chip 2007 Stock Option and Incentive Plan with performance-based vesting provisions tied to achievement of certain margin targets by the VI Chip subsidiary.

-9-

VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

As of December 31, 2010, the Company determined it was probable the margin targets could be achieved and, accordingly, began recording stock-based compensation expense relating to these options beginning January 1, 2011. This determination remains the same as of June 30, 2014 and, accordingly, expense has been recorded through that date. The unrecognized compensation expense for these performance-based options was approximately $683,000 as of June 30, 2014.

5. Net Loss per Share

The following table sets forth the computation of basic and diluted loss per share for the three and six months ended June 30 (in thousands, except per share amounts):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Numerator:
Net loss attributable to Vicor Corporation	$	(4,835	)	$	(4,616	)	$	(10,213	)	$	(9,606	)
Denominator:
Denominator for basic loss per share-weighted average shares (1)		38,542			38,538			38,541			39,852
Effect of dilutive securities:
Employee stock options (2)		—			—			—			—
Denominator for diluted loss per share – adjusted weighted-average shares and assumed conversions		38,542			38,538			38,541			39,852
Basic loss per share	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)
Diluted loss per share	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)

(1) Denominator represents weighted average number of shares of Common Stock and Class B Common Stock outstanding.

(2) Options to purchase 2,038,599 shares of Common Stock for the three and six months ended June 30, 2014 were not included in the calculation of net loss per share as the effect would have been antidilutive. Options to purchase 861,958 and 733,120 shares of Common Stock for the three and six months ended June 30, 2013, respectively, were not included in the calculation of net loss per share as the effect would have been antidilutive.

6. Inventories

Inventories are valued at the lower of cost (determined using the first-in, first-out method) or net realizable value. Fixed production overhead is allocated to the inventory cost per unit based on the normal capacity of the production facilities. Abnormal production costs, including fixed cost variances from normal production capacity, if any, are charged to cost of revenues in the period incurred. All shipping and handling costs incurred in connection with the sale of products are included in cost of revenues.

The Company provides reserves for inventories estimated to be excess, obsolete or unmarketable. The Company’s estimation process for assessing net realizable value is based upon its known backlog, projected future demand and expected market conditions, and historical usage. If the Company’s estimated demand and/or market expectation were to change or if product sales were to decline, the Company’s estimation process may cause larger inventory reserves to be recorded, resulting in larger charges to cost of revenues.

-10-

VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

Inventories were as follows (in thousands):

	June 30, 2014		December 31, 2013
Raw materials	$	19,789	$	19,744
Work-in-process		3,881		3,979
Finished goods		5,558		5,973
Net balance	$	29,228	$	29,696

7. Other Investments

The Company’s gross investment in non-voting convertible preferred stock of Great Wall Semiconductor Corporation (“GWS”) totaled $5,000,000 as of June 30, 2014 and December 31, 2013, giving the Company an approximately 27% ownership interest in GWS. GWS and its subsidiary design and sell semiconductors, conduct research and development activities, develop and license patents, and litigate against those who infringe upon its patented technologies. A director of the Company is the founder, Chairman of the Board, President and Chief Executive Officer (“CEO”), as well as the majority voting shareholder, of GWS. The Company and GWS are parties to an intellectual property cross-licensing agreement, a license agreement and two supply agreements under which the Company purchases certain components from GWS. Purchases from GWS totaled approximately $1,496,000 and $433,000 for the six months ended June 30, 2014, and 2013, respectively. The Company owed GWS approximately $166,000 and $152,000 as of June 30, 2014 and December 31, 2013, respectively.

The Company accounts for its investment in GWS under the equity method of accounting. The Company has determined that, while GWS is a variable interest entity, the Company is not the primary beneficiary. The key factors in the Company’s assessment were that the CEO of GWS has: (i) the power to direct the activities of GWS that most significantly impact its economic performance, and (ii) has an obligation to absorb losses or the right to receive benefits from GWS, respectively, that could potentially be significant to GWS.

The balance in the Company’s net investment in GWS was zero as of June 30, 2014, and December 31, 2013.

8. Product Warranties

The Company generally offers a two-year warranty for all of its products. The Company provides for the estimated cost of product warranties at the time product revenue is recognized. Factors that affect the Company’s warranty reserves include the number of units sold, historical and anticipated rates of warranty returns, and the cost per return. The Company assesses the adequacy of the warranty reserves and adjusts the amounts as necessary. Warranty obligations are included in “Accrued expenses” in the accompanying Condensed Consolidated Balance Sheets.

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VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

Product warranty activity for the three and six months ended June 30, was as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Balance at the beginning of the period	$	249		$	324		$	283		$	364
Accruals for warranties for products sold in the period		60			72			84			101
Fulfillment of warranty obligations		(77	)		(63	)		(132	)		(110	)
Revisions of estimated obligations		(7	)		(4	)		(10	)		(26	)
Balance at the end of the period	$	225		$	329		$	225		$	329

9. Income Taxes

The tax provision is based on the estimated annual effective tax rate for the year, which includes estimated federal, state and foreign income taxes (benefit) on the Company’s projected annual pre-tax income (loss) and estimated federal and state income taxes for certain noncontrolling interest subsidiaries that are not part of the Company’s consolidated income tax returns.

The provision (benefit) for income taxes and the effective income tax rate for the three and six months ended June 30, were as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Provision (benefit) for income taxes	$	—		$	(2,436	)	$	17		$	(5,931	)
Effective income tax rate		0.0	%		(34.6	%)		0.2	%		(38.2	%)

For the three and six months ended June 30, 2014, no tax benefit could be recognized for the majority of the Company’s losses due to a full valuation allowance against all domestic deferred tax assets. The provision for the six months ended June 30, 2014 is primarily due to state taxes. For the three and six months ended June 30, 2013, a net income tax benefit was recorded primarily due to an increase in net federal deferred tax assets not covered by a valuation allowance at that time, a potential net operating loss carryback for federal income tax purposes and the recognition of a benefit from the federal research tax credit for 2012 of $549,000, as a discrete item in the first quarter of 2013. The federal research tax credit for 2012 and 2013 was extended on January 2, 2013 pursuant to the American Taxpayer Relief Act of 2012.

As of June 30, 2014, the Company has a valuation allowance of approximately $20,194,000 primarily against all domestic net deferred tax assets, for which realization cannot be considered more likely than not at this time. Management assesses the need for the valuation allowance on a quarterly basis. In assessing the need for a valuation allowance, the Company considers all positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies, and past financial performance. In 2013, the Company recorded an increase to the valuation allowance of approximately $10,241,000 for all remaining domestic net deferred tax assets not previously covered by a valuation allowance due to the following factors: (1) the Company’s forecast of future taxable income, of the appropriate nature, based on its quarterly assessment was not sufficient to support the recoverability of the remaining domestic deferred tax assets; (2) recent cumulative losses and the Company’s projection of continued losses into 2014; (3) while the Company has the ability to carryback federal net operating losses or credits to utilize against federal taxable income, it will generate only $1,600,000 in cash refunds; and (4) the lack of prudent and feasible tax planning strategies. These assessment factors remain unchanged, as does management’s conclusion concerning the need for a full valuation allowance against all domestic net deferred tax assets, as of June 30, 2014. The valuation

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VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

allowance against these deferred tax assets may require adjustment in the future based on changes in the mix of temporary differences, changes in tax laws, and operating performance. If and when management determines the valuation allowance should be released, the adjustment would result in a tax benefit in the Condensed Consolidated Statements of Operations and may include a portion to be accounted for through “Additional paid-in capital”, a component of Stockholders’ Equity. The amount of the tax benefit to be recorded in a particular quarter could be material.

In August 2013, the Company received notice from the Internal Revenue Service that its federal corporate tax returns for the tax years 2010 and 2011 had been selected for examination. The examination fieldwork has been completed and the Company received the examination report in early July 2014. Based on the report, the results of the examination will not have a material impact on the Company’s financial statements. The Company expects the report will be finalized and examination officially closed in the third quarter of 2014.

The Company’s subsidiary in Italy, Vicor Italy S.r.l. (“Vicor Italy”), recently underwent a tax inspection for tax years 2009 – 2013, covering corporation, regional and value added taxes. Vicor Italy received a preliminary tax audit report dated June 30, 2014. The Company is in the process of evaluating the report and, while management believes it is too early to determine the likelihood or amount of potential liability at this time, it does not believe the ultimate impact of this matter will be material to the Company’s financial statements.

There are no other income tax examinations or audits currently in process.

10. Commitments and Contingencies

At June 30, 2014, the Company had approximately $909,000 of capital expenditure commitments.

On January 28, 2011, SynQor, Inc. (“SynQor”) filed a complaint for patent infringement against Ericsson, Inc. (“Ericsson”), Cisco Systems, Inc. (“Cisco”) and the Company in U.S. District Court for the Eastern District of Texas (“the Texas Action”). This immediately followed a complaint filed by the Company on January 26, 2011, in U.S. District Court for the District of Massachusetts, in which the Company sought a declaratory judgment that its bus converter products do not infringe any valid claim of certain of SynQor’s U.S. patents, and that the claims of those patents are invalid. SynQor and Ericsson subsequently entered into a definitive settlement agreement in May 2011 in which they, among other terms and conditions, agreed to mutual releases and a dismissal with prejudice of all claims asserted against each other in the litigation. With respect to the Company, SynQor’s complaint alleges the Company’s products, including, but not limited to, unregulated bus converters used in intermediate bus architecture power supply systems, infringe certain SynQor patents. SynQor seeks, among other items, an injunction against further infringement and an award of unspecified compensatory and enhanced damages, interest, costs and attorney fees. On February 8, 2011, SynQor filed a motion for preliminary injunction seeking an order enjoining the Company from manufacturing, using, selling, and offering for sale in the United States and/or importing into the United States certain identified unregulated bus converters, as well as any other bus converters not significantly different from those products. On February 17, 2011, the Company withdrew its Massachusetts action without prejudice to allow the litigation to proceed in Texas. On May 16, 2011, SynQor announced it was withdrawing its motion for preliminary injunction against the Company. On September 16, 2011, the U.S. District Court for the Eastern District of Texas issued an order setting a trial date of July 7, 2014. On September 20, 2011, SynQor filed an amended complaint in the Texas Action. The amended complaint repeated the allegations of patent infringement against the Company contained in SynQor’s original complaint, and included additional patent infringement allegations with respect to U.S. Patent No. 8,023,290 (“290 patent”), which was issued on that day. As with SynQor’s original complaint, the amended complaint alleged that the Company’s products, including but not limited to the Company’s unregulated bus converters used in intermediate bus architecture power supply systems, infringed the asserted patents. On October 4, 2011, the Company filed an answer and counterclaims to SynQor’s amended complaint, in which the Company alleges the 290 patent is unenforceable because it was procured through inequitable conduct before the U.S. Patent and Trademark Office and seeks damages against SynQor for SynQor’s unfair and deceptive trade practices and tortious interference with prospective economic advantage in connection with SynQor’s allegations of patent infringement against the Company. On January 2, 2014, the court issued its claim construction order following a claim construction hearing held on December 17, 2013. On January 16, 2014, the Company filed a motion seeking reconsideration of certain aspects of the court’s claim construction ruling. On March 31, 2014, the court issued an order

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VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

severing the case against the Company and Cisco into two separate matters, with separate trials to be held with respect to SynQor’s claims against Cisco and SynQor’s claims against the Company. The court also has indicated that any trial will be held after September 2014. The Company continues to believe that none of its products, including its unregulated bus converters, infringe any valid claim of the asserted SynQor patents, either alone or when used in an intermediate bus architecture implementation. The Company believes SynQor’s claims lack merit and, therefore, continues to vigorously defend itself against SynQor’s patent infringement allegations. The Company does not believe a loss is probable for this matter. If a loss were to be incurred, though, the Company cannot estimate the amount of possible loss or range of possible loss at this time.

In addition, the Company is involved in certain other litigation and claims incidental to the conduct of its business. While the outcome of lawsuits and claims against the Company cannot be predicted with certainty, management does not expect any current litigation or claims to have a material adverse impact on the Company’s financial position or results of operations.

11. Segment Information

The Company has organized its business segments according to its key product lines. The Brick Business Unit segment (“BBU”) designs, develops, manufactures and markets the Company’s modular power converters and configurable products, and also includes the operations of the Company’s Westcor division, the six entities comprising Vicor Custom Power, and the BBU operations of Vicor Japan Company, Ltd. (“VJCL”). The VI Chip segment includes VI Chip Corporation, which designs, develops, manufactures and markets the Company’s factorized power architecture (“FPA”) products. The VI Chip segment also includes the VI Chip business conducted through VJCL. The Picor segment includes Picor Corporation, which designs, develops, manufactures and markets integrated circuits and related products for use in a variety of power management and power system applications. Picor develops these products to be sold as part of the Company’s products or to third parties for separate applications.

The Company’s chief operating decision maker evaluates performance and allocates resources based on segment revenues and segment operating income (loss). The operating income (loss) for each segment includes selling, general and administrative and research and development expenses directly attributable to the segment. Certain of the Company’s indirect overhead costs, which include corporate selling, general and administrative expenses, are allocated among the segments based upon an estimate of costs associated with each segment. Assets allocated to each segment are based upon specific identification of such assets, which include accounts receivable, inventories, fixed assets and certain other assets. The Corporate segment consists of those operations and assets shared by all segments. The costs of certain centralized executive and administrative functions are recorded in this segment, as are certain shared assets, most notably cash and cash equivalents, deferred tax assets, long-term investments, the Company’s facilities in Massachusetts, real estate and other assets. The Company’s accounting policies and method of presentation for segments are consistent with that used throughout the Condensed Consolidated Financial Statements.

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VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

The following table provides significant segment financial data for the three months ended June 30, (in thousands):

	BBU		VI Chip			Picor			Corporate			Eliminations (1)			Total
2014:
Net revenues	$	47,885	$	4,634		$	2,667		$	—		$	(1,825	)	$	53,361
Income (loss) from operations		5,349		(9,406	)		(785	)		(172	)		—			(5,014	)
Total assets		144,592		16,942			4,560			75,182			(83,002	)		158,274
Depreciation and amortization		1,158		788			105			360			—			2,411
2013:
Net revenues	$	40,211	$	6,639		$	2,808		$	—		$	(2,793	)	$	46,865
Income (loss) from operations		2,441		(8,349	)		(811	)		(263	)		—			(6,982	)
Total assets		112,117		17,667			4,790			96,795			(54,101	)		177,268
Depreciation and amortization		1,283		807			111			333			—			2,534

The following table provides significant segment financial data for the six months ended June 30, (in thousands):

	BBU		VI Chip			Picor			Corporate			Eliminations (1)			Total
2014:
Net revenues	$	91,574	$	13,975		$	5,617		$	—		$	(4,572	)	$	106,594
Income (loss) from operations		7,661		(16,253	)		(1,527	)		(334	)		—			(10,453	)
Total assets		144,592		16,942			4,560			75,182			(83,002	)		158,274
Depreciation and amortization		2,351		1,579			206			718			—			4,854
2013:
Net revenues	$	78,413	$	10,046		$	4,590		$	—		$	(4,238	)	$	88,811
Income (loss) from operations		4,590		(17,587	)		(2,015	)		(466	)		—			(15,478	)
Total assets		112,117		17,667			4,790			96,795			(54,101	)		177,268
Depreciation and amortization		2,477		1,708			219			624			—			5,028

(1) The elimination for net revenues is principally related to inter-segment revenues of Picor to BBU and VI Chip and for inter-segment revenues of VI Chip to BBU. The elimination for total assets is principally related to inter-segment accounts receivable due to BBU for the funding of VI Chip and Picor operations.

12. Risks and Uncertainties

On July 16, 2014, the U.S. Department of the Treasury imposed new economic sanctions against Russian entities, targeting major banks and energy companies and a significant portion of the Russian defense industry, along with certain other parties. Although the Company sells its products in Russia through three independent distributors, against which the sanctions are not applicable, certain end-customers of these independent distributors have been identified as sanctioned entities. As of June 30, 2014, while backlog indirectly associated with these sanctioned entities was negligible, outstanding accounts receivable due from an independent distributor associated with sales to a sanctioned end-customer totaled approximately $906,000. The Company has no reason to believe it will not collect this amount from its independent distributor, although, given the current circumstances, management will carefully monitor the collectability of the outstanding amount, as well as the compliance of its distribution partners in the Russian market with U.S. trade restrictions, including the recent sanctions.

13. Impact of Recently Issued Accounting Standards

In May 2014, the Financial Accounting Standards Board (“FASB”) issued new guidance for revenue recognition, which will require an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The new guidance will replace most existing revenue recognition guidance in U.S. Generally Accepted Accounting Principles when it becomes effective which, for the Company, will be on January 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect the new guidance will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

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VICOR CORPORATION

Notes to Condensed Consolidated Financial Statements

June 30, 2014

(unaudited)

Effective January 1, 2014, the Company adopted new accounting guidance related to the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The guidance requires an unrecognized tax benefit to be presented as a decrease in a deferred tax asset where a net operating loss, a similar tax loss, or a tax credit carryforward exists and certain criteria are met. The adoption of this new guidance did not impact the Company’s financial position or results of operations.

-16-

VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

Item 2 — Management’s Discussion and Analysis of Financial Condition and Results of Operations

Except for historical information contained herein, some matters discussed in this report constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The words “believes,” “expects,” “anticipates,” “intend,” “estimate,” “plans,” “assumes,” “may,” “will,” “would,” “should,” “continue,” “prospective,” “project,” and other similar expressions identify forward-looking statements. Forward-looking statements also include statements regarding the transition of the Company’s business strategically and organizationally from serving a highly diversified customer base to serving an increasing number of large customers; the level of customer orders overall and, in particular, from large customers and the delivery lead times associated therewith; the financial and operational impact of customer changes to shipping schedules; the derivation of a portion of the Company’s sales in each quarter from orders booked in the same quarter; the Company’s ongoing development of power conversion architectures, switching topologies, packaging technologies, and products; the Company’s plans to invest in expanded manufacturing, capacity, and the timing thereof; the Company’s belief regarding currency risk being mitigated because of limited foreign exchange fluctuation exposure; the Company’s continued success depending in part on its ability to attract and retain qualified personnel; the Company’s belief that cash generated from operations and the total of its cash and cash equivalents will be sufficient to fund operations for the foreseeable future; the Company’s intentions regarding the declaration and payment of cash dividends; the Company’s intentions regarding protecting its rights under its patents; and the Company’s expectation that no current litigation or claims will have a material adverse impact on its financial position or results of operations. These statements are based upon the Company’s current expectations and estimates as to the prospective events and circumstances which may or may not be within the Company’s control and as to which there can be no assurance. Actual results could differ materially from those implied by forward-looking statements as a result of various factors, including the Company’s ability to: hire and retain key personnel; develop and market new products and technologies cost effectively, and on a timely basis leverage the Company’s new technologies in standard products to promote market acceptance of the Company’s new approach to power system architecture; leverage design wins into increased product sales; continue to meet requirements of key customers and prospects; enter into licensing agreements increasing the Company’s market opportunity and accelerating market penetration; realize significant royalties under such licensing agreements; achieve sustainable bookings rates for the Company’s products across both markets and geographies; improve manufacturing and operating efficiencies; successfully enforce the Company’s intellectual property rights; successfully defend outstanding litigation; and maintain an effective system of internal controls over financial reporting, including the Company’s ability to obtain required financial information for investments on a timely basis, the Company’s ability to assess the value of assets, including illiquid investments, and the accounting therefor. These and other factors that may influence actual results are described in the risk factors set forth in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013, under Part I, Item I — “Business,” under Part I, Item 1A — “Risk Factors,” under Part I, Item 3 — “Legal Proceedings,” and under Part II, Item 7 — “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” The risk factors contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 may not be exhaustive. Therefore, the information contained therein should be read together with other reports and documents that the Company files with the Securities and Exchange Commission from time to time, including Forms 10-Q, 8-K and 10-K, which may supplement, modify, supersede or update those risk factors. The Company does not undertake any obligation to update any forward-looking statements as a result of future events or developments.

Overview

We design, develop, manufacture and market modular power components and complete power systems. We sell our products primarily to customers in the higher-performance, higher-power segments of the power systems market, including aerospace and defense electronics, enterprise and high performance computing, industrial equipment and automation, telecommunications and network infrastructure, and vehicles and transportation.

We have organized our business segments according to our key product lines. The Brick Business Unit segment (“BBU”) designs, develops, manufactures and markets our modular power converters and configurable products, and also includes the operations of our Westcor division, the six entities comprising Vicor Custom Power, and the BBU operations of Vicor Japan Company, Ltd. (“VJCL”). The VI Chip segment includes VI Chip Corporation, which designs, develops, manufactures and markets our factorized power architecture (“FPA”) products. The VI Chip segment also includes the VI Chip business conducted through VJCL. Picor Corporation designs, develops, manufactures and markets integrated circuits and related products for use in a variety of power management and power system applications. Picor develops these products to be sold as part of our products or to third parties for separate applications.

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VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

Our bookings, revenues, and operating results to date in 2014 continue to be negatively influenced by macroeconomic conditions across markets and geographies, the consequences of customer concentration, and slower than anticipated customer adoption of our new products. Additionally, our operating results have been negatively impacted recently by the high cost of litigation. Certain markets in which we have historically focused remain weak, notably defense electronics. Geographically, European demand remains weak due to economic uncertainty across much of the region. Because we are shifting our strategy toward serving fewer, higher volume customers with our innovative new products, we currently are vulnerable to swings in demand from a relatively small number of early adopting customers, although our objective is to diversify our customer base, given the breadth of applications of these new products. However, until customer adoption of these new products accelerates, we may not achieve such customer diversification.

On July 16, 2014, the U.S. Department of the Treasury imposed new economic sanctions against Russian entities, targeting major banks and energy companies and a significant portion of the Russian defense industry, along with certain other parties. Although we sell our products in Russia through three independent distributors, against which the sanctions are not applicable, certain end-customers of these independent distributors have been identified as sanctioned entities. As of June 30, 2014, while backlog indirectly associated with these sanctioned entities was negligible, outstanding accounts receivable due from an independent distributor associated with sales to a sanctioned end-customer totaled approximately $906,000. We have no reason to believe we will not collect this amount from our independent distributor, although, given the current circumstances, we will carefully monitor the collectability of the outstanding amount, as well as the compliance of our distribution partners in the Russian market with U.S. trade restrictions, including the recent sanctions.

Revenues for the second quarter of 2014 increased by 13.9% to $53,361,000 from $46,865,000 for the corresponding period in 2013, and increased by 0.2% on a sequential basis from $53,233,000 for the first quarter of 2014. Export sales as a percentage of total revenues for the three months ended June 30, 2014 and 2013 were approximately 57% and 58%, respectively. Gross margin increased to $22,662,000 for the second quarter of 2014 from $18,461,000 in the second quarter of 2013, but decreased on a sequential basis from $22,792,000 for the first quarter of 2014. Gross margin as a percentage of revenue increased to 42.5% for the second quarter of 2014 compared to 39.4% for the second quarter of 2013, but decreased on a sequential basis from 42.8% for the first quarter of 2014.

Revenues for the six months ended June 30, 2014 increased by 20.0% to $106,594,000 from $88,811,000 for the corresponding period in 2013. Export sales as a percentage of total revenues for the six months ended June 30, 2014 and 2013 were approximately 59% and 56%, respectively. Gross margin increased to $45,454,000 for the six months ended June 30, 2014 from $35,068,000 for the corresponding period in 2013. Gross margin as a percentage of revenue increased to 42.6% for the six months ended June 30, 2014 compared to 39.5% for the corresponding period a year ago.

Backlog, representing the total of orders for products for which shipment is scheduled within the next 12 months, was $45,648,000 at the end of the second quarter of 2014, as compared to $41,562,000 at the end of the first quarter of 2014.

Operating expenses for the three months ended June 30, 2014 increased $2,233,000, or 8.8%, to $27,676,000 from $25,443,000 for the corresponding period in 2013, due to an increase in selling, general and administrative expenses of $1,578,000 and research and development expenses of $655,000. The primary elements of the increase in selling, general and administrative expenses were legal fees of $2,162,000, partially offset by decreases in bad debt expense of $245,000, training and professional development of $175,000, and stockholder reporting of $130,000. The increase in legal fees is due to the ongoing litigation with SynQor, Inc. The primary elements of the increase in research and development expenses were compensation expenses of $300,000, project and pre-production materials of $176,000, deferred costs of $97,000, and depreciation and amortization of $55,000.

Operating expenses for the six months ended June 30, 2014 increased $5,361,000, or 10.6%, to $55,907,000 from $50,546,000 for the corresponding period in 2013, primarily due to an increase in selling, general and administrative expenses of $5,671,000 and research and development expenses of $1,051,000. The primary elements of the increase in selling, general and administrative expenses were legal fees of $5,158,000, compensation expenses of $647,000, commissions expense of $222,000, and depreciation and amortization expenses of $115,000, partially offset by decreases in bad debt expense of $214,000, advertising expenses of $193,000,

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VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

training and development expenses of $168,000, stockholder reporting of $122,000, and outside services of $113,000. The increase in legal fees is due to the ongoing litigation with SynQor, Inc. The primary elements of the increase in research and development expenses were project and pre-production materials of $507,000, compensation expenses of $232,000, depreciation and amortization of $123,000, and deferred costs of $85,000.

During the first quarter of 2013, we recorded a pre-tax charge of $1,361,000 for severance and other employee-related costs for a workforce reduction initiated and completed in February 2013.

Net loss attributable to Vicor Corporation for the second quarter of 2014 was $(4,835,000), or $(0.13) per share, compared to net loss attributable to Vicor Corporation of $(4,616,000), or $(0.12) per share, for the second quarter of 2013, and net loss attributable to Vicor Corporation of $(5,378,000), or $(0.14) per share, for the first quarter of 2014.

Net loss attributable to Vicor Corporation for the six months ended June 30, 2014, was $(10,213,000), or $(0.26) per share, compared to net loss attributable to Vicor Corporation of $(9,606,000), or $(0.24) per share, for the corresponding period a year ago.

For the six months ended June 30, 2014, depreciation and amortization totaled $4,854,000 and capital additions totaled $3,481,000, compared to $5,028,000 and $2,543,000, respectively, for the first six months of 2013.

Inventories decreased by approximately $468,000 or 1.6% to $29,228,000, compared to $29,696,000 at December 31, 2013. This decrease was associated with a decrease in BBU inventories of $507,000, partially offset by an increase in VI Chip inventories of $45,000.

Critical Accounting Policies and Estimates

Please refer to the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 for a summary of the critical accounting policies and estimates.

Three months ended June 30, 2014, compared to three months ended June 30, 2013

Net revenues for the second quarter of 2014 were $53,361,000, an increase of $6,496,000 or 13.9% as compared to $46,865,000 for the same period a year ago, and an increase of 0.2% on a sequential basis from the first quarter of 2014.

The components of net revenues for the three months ended June 30, were as follows (dollars in thousands):

					Increase (decrease)
	2014		2013		$			%
BBU	$	47,885	$	40,211	$	7,674			19.1	%
VI Chip		4,198		6,044		(1,846	)		(30.5	)%
Picor		1,278		610		668			109.5	%
Total	$	53,361	$	46,865	$	6,496			13.9	%

The overall increase in net revenues during the second quarter of 2014 compared to 2013 was primarily due to increased BBU bookings in the first quarter of 2014 compared to the first quarter of 2013. The increase in BBU revenues is primarily attributed to increases in BBU component revenues of approximately $4,328,000, Vicor Custom Power revenues of approximately $2,736,000, and Vicor Japan revenues of approximately $555,000. The decline in VI Chip revenues was expected, as the segment’s major datacenter customer is transitioning to a new VI Chip product platform. Net revenues increased sequentially from the first quarter of 2014 by $128,000, or 0.2%. Overall bookings during the three months ended June 30, 2014 decreased by 5.9% compared to the same period in 2013, but increased sequentially from the first quarter of 2014 by 14.6%.

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VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

Gross margin for the second quarter of 2014 increased $4,201,000, or 22.8%, to $22,662,000 from $18,461,000 in the second quarter of 2013. Gross margin as a percentage of net revenues increased to 42.5% from 39.4%. The increase in gross margin and gross margin percentage was primarily due to the increase in net revenues and the shift to a larger proportion of higher margin BBU products.

Selling, general and administrative expenses were $17,033,000 for the quarter ended June 30, 2014, an increase of $1,578,000, or 10.2%, compared to $15,455,000 for the same period in 2013. Selling, general and administrative expenses as a percentage of net revenues decreased to 31.9% from 33.0% for the same period in 2013, due to the increase in net revenues.

The components of the $1,578,000 increase in selling, general and administrative expenses were as follows (in thousands):

	Increase (decrease)
Legal fees	$	2,162		426.2	%(1)
Facilities expenses		37		11.9	%
Supplies expense		24		25.1	%
Advertising expenses		(45	)	(6.8	)%
Employment recruiting		(56	)	(46.2	)%
Outside services		(67	)	(16.1	)%
Stockholder reporting		(130	)	(61.6	)%(2)
Training and professional development		(175	)	(91.0	)%(3)
Bad debt expense		(245	)	(122.8	)%(4)
Other, net		73		0.6	%
	$	1,578		10.2	%

(1) Increase attributed to legal expenses associated with the ongoing patent infringement claim filed against the Company during the first quarter of 2011 by SynQor, Inc. See Note 10 to the Condensed Consolidated Financial Statements.

(2) Decrease primarily attributed to additional expenses incurred in 2013 in connection with the tender offer for shares of our Common Stock and for an exchange of outstanding employee stock options completed in the second quarter of 2013.

(3) Decrease primarily attributed to lower corporate management and sales personnel training expenses relative to 2013.

(4) Decrease attributed to additional expense recognized in the second quarter of 2013 pertaining to one customer, without a comparable increase in 2014.

-20-

VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

Research and development expenses were $10,643,000 for the quarter ended June 30, 2014, an increase of $655,000, or 6.6%, compared to $9,988,000 for the same period in 2013. As a percentage of net revenues, research and development expenses decreased to 19.9% from 21.3% for the same period in 2013, due to the increase in net revenues.

The components of the $655,000 increase in research and development expenses were as follows (in thousands):

	Increase (decrease)
Compensation	$	300		4.3	%(1)
Project and pre-production materials		176		17.1	%(2)
Deferred costs		97		82.9	%(3)
Depreciation and amortization		55		10.5	%
Supplies expense		51		27.1	%
Computer expenses		(52	)	(36.7	)%
Outside services/subcontract labor		(56	)	(19.4	)%(4)
Other, net		84		8.9	%
	$	655		6.6	%

(1) Increase primarily attributed to annual compensation adjustments in May 2014.

(2) Increase primarily attributed to an increase in materials used in the development of VI Chip products.

(3) Increase primarily attributed to a decrease in deferred costs capitalized for certain non-recurring engineering projects for which the related revenues have been deferred.

(4) Decrease primarily attributed to decreased use of outside services and subcontract labor.

The significant changes in the components of the “Other income, net” were as follows (in thousands):

						Increase
	2014		2013			(decrease)
Interest income	$	23	$	27		$	(4	)
Foreign currency gains (losses)		21		(11	)		32
Credit gains (losses) on available-for-sale securities		20		(80	)		100
Gain on disposals of equipment		2		—			2
Other, net		16		10			6
	$	82	$	(54	)	$	136

Our exposure to market risk for fluctuations in foreign currency exchange rates relates primarily to the operations of VJCL, for which the functional currency is the Japanese yen. The functional currency of our subsidiaries in Europe and other subsidiaries in Asia is the U.S. dollar. The decrease in interest income for the period was due to lower average balances on our short-term and long-term investments as well as a general decrease in interest rates.

Loss before income taxes was $(4,932,000) for the second quarter of 2014, as compared to $(7,036,000) for the same period in 2013.

-21-

VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

The provision (benefit) for income taxes and the effective income tax rate were as follows (dollars in thousands):

	2014			2013
Provision (benefit) for income taxes	$	—		$	(2,436	)
Effective income tax rate		0.0	%		(34.6	%)

For the three months ended June 30, 2014, no tax benefit could be recognized for the majority of our losses due to a full valuation allowance against all domestic deferred tax assets. For the three months ended June 30, 2013, a net income tax benefit was recorded primarily due to an increase in net federal deferred tax assets not covered by a valuation allowance at that time, a potential net operating loss carryback for federal income tax purposes, and the recognition of a benefit from the federal research tax credit for 2013. The federal research tax credit for 2013 was extended on January 2, 2013 pursuant to the American Taxpayer Relief Act of 2012.

Net loss per share attributable to Vicor Corporation was $(0.13) for the second quarter of 2014, compared to net loss per share of $(0.12) for the second quarter of 2013.

Six months ended June 30, 2014 compared to six months ended June 30, 2013

Net revenues for the six months ended June 30, 2014 were $106,594,000, an increase of $17,783,000 or 20.0%, as compared to $88,811,000 for the same period a year ago.

The components of net revenues for the six months ended June 30, were as follows (dollars in thousands):

					Increase (decrease)
	2014		2013		$		%
BBU	$	91,574	$	78,413	$	13,161		16.8	%
VI Chip		12,782		9,142		3,640		39.8	%
Picor		2,238		1,256		982		78.2	%
Total	$	106,594	$	88,811	$	17,783		20.0	%

The overall increase in net revenues for the six months ended June 30, 2014 was primarily due to an approximately 10% increase in bookings in the fourth quarter of 2013 and the first quarter of 2014, compared to the fourth quarter of 2012 and the first quarter of 2013. The increase in BBU revenues is primarily attributed to increases in BBU component revenues of approximately $7,820,000, Vicor Custom Power revenues of approximately $4,318,000, Vicor Japan revenues of approximately $679,000, and Westcor revenues of approximately $321,000. The increase in VI Chip revenues, specifically in the first quarter of 2014, was due to increased bookings in the second half of 2013 compared to the second half of 2012, primarily from the segment’s major datacenter customer. This customer placed additional orders for the original product platform, prior to transitioning to a new VI Chip product platform in the second quarter of 2014.

Gross margin for the first six months of 2014 increased $10,386,000, or 29.6%, to $45,454,000 from $35,068,000 in the same period a year ago. Gross margin as a percentage of net revenues increased to 42.6% from 39.5%. The increase in gross margin and gross margin percentage was primarily due to the increase in net revenues and to the shift to a larger proportion of higher margin BBU products.

-22-

VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

Selling, general and administrative expenses were $35,013,000 for the six months ended June 30, 2014, an increase of $5,671,000, or 19.3%, compared to $29,342,000 for the same period in 2013. Selling, general and administrative expenses as a percentage of net revenues decreased to 32.8% from 33.0% for the same period in 2013, primarily due to the increase in net revenues.

The components of the $5,671,000 increase in selling, general and administrative expenses were as follows (in thousands):

	Increase (decrease)
Legal fees	$	5,158		542.3	%(1)
Compensation		647		3.7	%(2)
Commissions expense		222		10.1	%(3)
Depreciation and amortization		115		8.5	%(4)
Facilities expenses		101		16.5	%
Audit, tax, and accounting fees		88		9.5	%
Travel expenses		69		5.0	%
Outside services		(113	)	(13.1	)%(5)
Stockholder reporting		(122	)	(48.7	)%(6)
Training and professional development		(168	)	(82.1	)%(7)
Advertising expenses		(193	)	(14.4	)%(8)
Bad debt expense		(214	)	(97.4	)%(9)
Other, net		81		5.4	%
	$	5,671		19.3	%

(1) Increase attributed to legal expenses associated with the ongoing patent infringement claim filed against the Company during the first quarter of 2011 by SynQor, Inc. See Note 10 to the Condensed Consolidated Financial Statements.

(2) Increase primarily attributed to annual compensation adjustments in May 2014.

(3) Increase primarily attributed to the increase in net revenues subject to commissions.

(4) Increase primarily attributed to additions of corporate fixed assets over the past several quarters.

(5) Decrease attributed to a reduction in the use of outside consultants by the sales and marketing departments.

(6) Decrease primarily attributed to additional expenses incurred in 2013 in connection with the tender offers for shares of our Common Stock completed in the first and second quarters of 2013, and for an exchange of outstanding employee stock options completed in the second quarter of 2013.

(7) Decrease primarily attributed to lower corporate management and sales personnel training expenses relative to 2013.

(8) Decrease primarily attributed to decreases in sales support expenses, direct mailings, and advertising in trade publications.

(9) Decrease attributed to additional expense recognized in the second quarter of 2013 pertaining to one customer, without a comparable increase in 2014.

-23-

VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

Research and development expenses were $20,894,000 for the six months ended June 30, 2014, an increase of $1,051,000, or 5.3%, compared to $19,843,000 for the same period in 2013. As a percentage of net revenues, research and development expenses decreased to 19.6% from 22.3% for the same period in 2013, primarily due to the increase in net revenues.

The components of the $1,051,000 increase in research and development expenses were as follows (in thousands):

	Increase (decrease)
Project and pre-production materials	$	507	25.6	%(1)
Compensation		232	1.7	%(2)
Depreciation and amortization		123	11.9	%(3)
Deferred costs		85	69.1	%(4)
Facilities expenses		65	7.0	%
Other, net		39	1.8	%
	$	1,051	5.3	%

(1) Increase attributed to increases in spending by the BBU and VI Chip segments.

(2) Increase primarily attributed to annual compensation adjustments in May 2014.

(3) Increase primarily attributed to additions of engineering equipment over the past several quarters for BBU and Picor.

(4) Increase primarily attributed to a decrease in deferred costs capitalized for certain non-recurring engineering projects for which the related revenues have been deferred.

During the first quarter of 2013, we recorded a pre-tax charge of $1,361,000 for the cost of severance and other employee-related costs for a workforce reduction initiated and completed in February 2013.

The significant changes in the components of the “Other income, net” were as follows (in thousands):

						Increase
	2014		2013			(decrease)
Interest income	$	37	$	45		$	(8	)
Foreign currency gains (losses)		24		(38	)		62
Credit gains (losses) on available-for-sale securities		20		(79	)		99
Gain on disposals of equipment		6		3			3
Other, net		25		30			(5	)
	$	112	$	(39	)	$	151

Our exposure to market risk for fluctuations in foreign currency exchange rates relates primarily to the operations of VJCL, for which the functional currency is the Japanese yen. The functional currency of our subsidiaries in Europe and other subsidiaries in Asia is the U.S. dollar. The decrease in interest income for the period was due to lower average balances on our short-term and long-term investments as well as a general decrease in interest rates.

Loss before income taxes was $(10,341,000) for the first six months of 2014 compared to $(15,517,000) for the same period in 2013.

-24-

VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

The provision (benefit) for income taxes and the effective income tax rate were as follows (dollars in thousands):

	2014			2013
Provision (benefit) for income taxes	$	17		$	(5,931	)
Effective income tax rate		0.2	%		(38.2	%)

For the six months ended June 30, 2014, no tax benefit could be recognized for the majority of our losses due to a full valuation allowance against all domestic deferred tax assets. The provision for the period is primarily due to state taxes. For the six months ended June 30, 2013, a net income tax benefit was recorded primarily due to an increase in net federal deferred tax assets not covered by a valuation allowance at that time, a potential net operating loss carryback for federal income tax purposes, and the recognition of a benefit from the federal research tax credit for 2012 of $549,000, as a discrete item in the first quarter of 2013. The federal research tax credit for 2012 and 2013 was extended on January 2, 2013 pursuant to the American Taxpayer Relief Act of 2012.

Net loss per share attributable to Vicor Corporation was $(0.26) for the first six months of 2014, compared to net loss per share of $(0.24) for the first six months of 2013.

Liquidity and Capital Resources

At June 30, 2014, we had $50,805,000 in cash and cash equivalents. The ratio of current assets to current liabilities was 4.9:1 as of June 30, 2014 and 5.7:1 as of December 31, 2013. Working capital decreased $7,897,000 to $89,972,000 as of June 30, 2014 from $97,869,000 as of December 31, 2013.

The primary working capital changes were due to the following (in thousands):

	Increase (decrease)
Cash and cash equivalents	$	(5,534	)
Short-term investments		179
Accounts receivable		(614	)
Inventories, net		(468	)
Other current assets		736
Accounts payable		(544	)
Accrued compensation and benefits		(676	)
Deferred revenue		(241	)
Other current liabilities		(735	)
	$	(7,897	)

The primary uses of cash for the six months ended June 30, 2014 was for operating activities of $2,221,000 and the purchase of equipment of $3,481,000.

In November 2000, our Board of Directors authorized the repurchase of up to $30,000,000 of our Common Stock (the “November 2000 Plan”). The November 2000 Plan authorizes us to make such repurchases from time to time in the open market or through privately negotiated transactions. The timing and amounts of stock repurchases are at the discretion of management based on its view of economic and financial market conditions. We did not repurchase shares of Common Stock under the November 2000 Plan during the six months ended June 30, 2014. As of June 30, 2014, we had approximately $8,541,000 remaining under the November 2000 Plan.

-25-

VICOR CORPORATION

Management’s Discussion and Analysis of

Financial Condition and Results of Operation

June 30, 2014

Our primary liquidity needs are for making continuing investments in manufacturing equipment. We believe cash generated from operations and the total of our cash and cash equivalents will be sufficient to fund planned operations and capital equipment purchases for the foreseeable future. We had approximately $909,000 of capital expenditure commitments, principally for manufacturing equipment, as of June 30, 2014.

As of June 30, 2014, we held $6,000,000 of auction rate securities at par value classified as long-term investments. Please see Note 2 to the Condensed Consolidated Financial Statements for a discussion of the securities and our accounting treatment thereof.

Based on our ability to access cash and cash equivalents and our expected operating cash flows, we do not anticipate the current lack of liquidity of our auction rate securities will affect our ability to execute our current operating plan.

We do not consider the impact of inflation and changing prices on our business activities or fluctuations in the exchange rates for foreign currency transactions to have been significant during the last three fiscal years.

-26-

VICOR CORPORATION

June 30, 2014

Item 3 — Quantitative and Qualitative Disclosures About Market Risk

We are exposed to a variety of market risks, including changes in interest rates affecting the return on our cash and cash equivalents and long-term investments, and fluctuations in foreign currency exchange rates. As our cash and cash equivalents consist principally of cash accounts and money market securities, which are short-term in nature, we believe our exposure to market risk on interest rate fluctuations for these investments is not significant. Our short-term and long-term investments consist mainly of municipal and corporate debt securities, of which the Failed Auction Securities represent a significant portion. While the Failed Auction Securities are Aaa/AA+/A3/BBB rated by major credit rating agencies, collateralized by student loans and guaranteed by the U.S. Department of Education under the Federal Family Education Loan Program, continued failure to sell at their reset dates could negatively impact the carrying value of the investments, in turn leading to impairment charges in future periods. Changes in the fair value of the Failed Auction Securities attributable to credit loss are recorded through earnings, with the remainder of any change recorded in “Accumulated other comprehensive income (loss)”, a component of Stockholders’ Equity. Should a decline in the value of the Failed Auction Securities be other than temporary, the losses would be recorded in “Other income, net.” We do not believe there was an “other-than-temporary” decline in value in these securities as of June 30, 2014. (See Note 2 to the Condensed Consolidated Financial Statements for additional details).

Our exposure to market risk for fluctuations in foreign currency exchange rates relates primarily to the operations of VJCL and changes in the dollar/yen exchange rate, as the functional currency of our subsidiaries in Europe and other subsidiaries in Asia is the U.S. dollar. Therefore, we believe market risk is mitigated since these operations are not materially exposed to foreign exchange fluctuations.

Item 4 — Controls and Procedures

(a) Disclosure regarding controls and procedures.

As required by Rule 13a-15 under the Securities Exchange Act, management, with the participation of our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), conducted an evaluation of the effectiveness of our disclosure controls and procedures as of the end of the last fiscal quarter (i.e., June 30, 2014). The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of June 30, 2014, our CEO and CFO concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. Accordingly, management, including the CEO and CFO, recognizes our disclosure controls or our internal control over financial reporting may not prevent or detect all errors and all fraud. The design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Further, because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Controls can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Projections of any control’s effectiveness to future periods are subject to risks. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.

-27-

VICOR CORPORATION

June 30, 2014

(b) Changes in internal control over financial reporting.

There was no change in our internal control over financial reporting that occurred during the fiscal quarter ended June 30, 2014, that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

-28-

VICOR CORPORATION

Part II – Other Information

June 30, 2014

Item 1 — Legal Proceedings

See Note 10. Commitments and Contingencies in the Notes to Condensed Consolidated Financial Statements in Part I — Item 1 - Financial Statements.

Item 1A — Risk Factors

There have been no material changes in the risk factors described in Item 1A (“Risk Factors”) of the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

Item 2 — Unregistered Sales of Equity Securities and Use of Proceeds

	Issuer Purchases of Equity Securities
							Maximum Number
							(of Approximate
					Total Number of		Dollar Value) of
					Shares (or Units)		Shares (or Units)
	Total Number		Average Price		Purchased as Part		that May Yet Be
	of Shares		Paid		of Publicly		Purchased Under
	(or Units)		per Share		Announced Plans		the Plans or
Period	Purchased		(or Unit)		or Programs		Programs
April 1 - 30, 2014		—	$	—		—	$	8,541,000
May 1 - 31, 2014		—		—		—		8,541,000
June 1 - 30, 2014		—		—		—		8,541,000

In November 2000, our Board of Directors authorized the repurchase of up to $30,000,000 our Common Stock, of which $8,541,000 remains authorized for additional purchases.

Item 6 — Exhibits

Exhibit Number	Description
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101	The following material from the Company’s Quarterly Report on Form 10-Q, for the quarter ended June 30, 2014, formatted in XBRL (Extensible Business Reporting Language): (i) the Condensed Consolidated Balance Sheets; (ii) the Condensed Consolidated Statements of Operations; (iii) the Condensed Consolidated Statements of Comprehensive Income (Loss) (iv) the Condensed Consolidated Statements of Cash Flows; and (v) the Notes to Condensed Consolidated Financial Statements.

-29-

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	VICOR CORPORATION
Date: July 25, 2014	By:	/s/ Patrizio Vinciarelli
		Patrizio Vinciarelli Chairman of the Board, President and Chief Executive Officer (Principal Executive Officer)
Date: July 25, 2014	By:	/s/ James A. Simms
		James A. Simms Vice President, Chief Financial Officer (Principal Financial Officer)

-30-

EX-31.1

Exhibit 31.1

CHIEF EXECUTIVE OFFICER CERTIFICATION

I, Patrizio Vinciarelli, certify:

1. I have reviewed this quarterly report on Form 10-Q of Vicor Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: July 25, 2014

/s/ Patrizio Vinciarelli

Patrizio Vinciarelli

Chief Executive Officer

EX-31.2

Exhibit 31.2

CHIEF FINANCIAL OFFICER CERTIFICATION

I, James A. Simms, certify:

1. I have reviewed this quarterly report on Form 10-Q of Vicor Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: July 25, 2014

/s/ James A. Simms

James A. Simms

Vice President, Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Vicor Corporation (the “Company”) on Form 10-Q for the period ending June 30, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Patrizio Vinciarelli, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Patrizio Vinciarelli

Patrizio Vinciarelli

President, Chairman of the Board and

Chief Executive Officer

July 25, 2014

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Vicor Corporation (the “Company”) on Form 10-Q for the period ending June 30, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James A. Simms, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ James A. Simms

James A. Simms

Vice President, Chief Financial Officer

July 25, 2014

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

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Net Loss per Share - Computation of Basic and Diluted Loss per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:
Net loss attributable to Vicor Corporation	$ (4,835)	$ (4,616)	$ (10,213)	$ (9,606)
Denominator:
Denominator for basic loss per share-weighted average shares	38,542	38,538	38,541	39,852
Effect of dilutive securities:
Denominator for diluted loss per share - adjusted weighted-average shares and assumed conversions	38,542	38,538	38,541	39,852
Basic loss per share	$ (0.13)	$ (0.12)	$ (0.26)	$ (0.24)
Diluted loss per share	$ (0.13)	$ (0.12)	$ (0.26)	$ (0.24)

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Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014 Entity
Segment Reporting [Abstract]
Number of entities comprising operating segment	6

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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Mar. 31, 2013
Deferred Tax Assets Liabilities [Line Items]
Tax benefit recognized	$ 0	$ 0
Federal research tax credit				549,000
Valuation allowance, deferred tax assets	20,194,000	20,194,000
Deferred tax assets valuation allowance increase			10,241,000
Forecast [Member]
Deferred Tax Assets Liabilities [Line Items]
Expected cash refunds to be generated	$ 1,600,000	$ 1,600,000

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Fair Value Measurements - Assets Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	$ 5,637	$ 5,651
Failed Auction Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	4,904	4,825
Recurring [Member] | Short-Term Brokered Certificates of Deposit [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	642	463
Recurring [Member] | Failed Auction Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	4,904	4,825
Recurring [Member] | Long-Term Brokered Certificates of Deposit [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	91	363
Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash Equivalents	12,041	12,407
Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Money Market Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash Equivalents	12,041	12,407
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Short-Term Brokered Certificates of Deposit [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	642	463
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Long-Term Brokered Certificates of Deposit [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	91	363
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Failed Auction Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Estimated Fair Value	$ 4,904	$ 4,825

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Inventories (Tables)

6 Months Ended

Jun. 30, 2014

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories were as follows (in thousands):

	June 30, 2014		December 31, 2013
Raw materials	$	19,789	$	19,744
Work-in-process		3,881		3,979
Finished goods		5,558		5,973
Net balance	$	29,228	$	29,696

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Risks and Uncertainties - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014 Distributor
Unusual Risk or Uncertainty [Line Items]
Number of independent distributors	3
Customer Concentration Risk [Member]
Unusual Risk or Uncertainty [Line Items]
Accounts receivable due from an independent distributor	$ 906,000

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Other Investments - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014 Agreement	Jun. 30, 2013	Dec. 31, 2013
Variable Interest Entity [Line Items]
Ownership interest in investment	27.00%		27.00%
Number of supply agreements with GWS	2
Purchase of components under agreement	$ 1,496,000	$ 433,000
Company owed GWS	166,000		152,000
Great Wall Semiconductor Corporation (GWS) [Member]
Variable Interest Entity [Line Items]
Investment in non-voting convertible preferred stock	0		0
Great Wall Semiconductor Corporation (GWS) [Member] | Convertible Preferred Stock [Member]
Variable Interest Entity [Line Items]
Investment in non-voting convertible preferred stock	$ 5,000,000		$ 5,000,000

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Stock-Based Compensation - Stock-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 537	$ 1,139	$ 771	$ 1,402
Cost of Revenues [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	64	40	100	44
Selling, General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	373	998	564	1,181
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 100	$ 101	$ 107	$ 177

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Commitments and Contingencies - Additional Information (Detail) (USD $)	Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]
Capital expenditure commitments	$ 909,000

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Short-Term and Long-Term Investments

6 Months Ended

Jun. 30, 2014

Investments Debt And Equity Securities [Abstract]

Short-Term and Long-Term Investments

2. Short-Term and Long-Term Investments

As of June 30, 2014, the Company held auction rate securities that had experienced failed auctions totaling $6,000,000 at par value, all of which had been purchased through and are held by a broker-dealer affiliate of Bank of America, N.A. (the “Failed Auction Securities”). The Failed Auction Securities held by the Company are Aaa/AA+/A3/BBB rated by major credit rating agencies, collateralized by student loans, and guaranteed by the U.S. Department of Education under the Federal Family Education Loan Program. Management is not aware of any reason to believe any of the issuers of the Failed Auction Securities are presently at risk of default. Through June 30, 2014, the Company has continued to receive interest payments on the Failed Auction Securities in accordance with the terms of their respective indentures. Management believes the Company ultimately should be able to liquidate all of the Failed Auction Securities without significant loss primarily due to the overall quality of the issues held and the collateral securing the substantial majority of the underlying obligations. However, current conditions in the auction rate securities market have led management to conclude the recovery period for the Failed Auction Securities exceeds 12 months. As a result, the Company continued to classify the Failed Auction Securities as long-term as of June 30, 2014.

The following is a summary of available-for-sale securities (in thousands):

			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
June 30, 2014	Cost		Gains		Losses		Value
Failed Auction Securities	$	6,000	$	—	$	1,096	$	4,904
Brokered certificates of deposit		730		3		—		733
	$	6,730	$	3	$	1,096	$	5,637
			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
December 31, 2013	Cost		Gains		Losses		Value
Failed Auction Securities	$	6,000	$	—	$	1,175	$	4,825
Brokered certificates of deposit		820		6		—		826
	$	6,820	$	6	$	1,175	$	5,651

All of the Failed Auction Securities as of June 30, 2014 have been in an unrealized loss position for greater than 12 months.

The amortized cost and estimated fair value of available-for-sale securities on June 30, 2014, by contractual maturities, are shown below (in thousands):

			Estimated
	Cost		Fair Value
Due in one year or less	$	640	$	642
Due in two to ten years		90		91
Due in ten to twenty years		—		—
Due in twenty to forty years		6,000		4,904
	$	6,730	$	5,637

Based on the fair value measurements described in Note 3, the fair value of the Failed Auction Securities on June 30, 2014, with a par value of $6,000,000, was estimated by the Company to be approximately $4,904,000, an increase in fair value of $79,000 from December 31, 2013. The gross unrealized loss of $1,096,000 on the Failed Auction Securities consists of two types of estimated loss: an aggregate credit loss of $375,000 and an aggregate temporary impairment of $721,000. In determining the amount of credit loss, the Company compared the present value of cash flows expected to be collected to the amortized cost basis of the securities, considering credit default risk probabilities and changes in credit ratings as significant inputs, among other factors (See Note 3).

The following table represents a rollforward of the activity related to the credit (gain) loss recognized in earnings on available-for-sale auction rate securities held by the Company for the six months ended June 30 (in thousands):

	2014			2013
Balance at the beginning of the period	$	395		$	317
Changes in the amount related to credit (gain) loss for which other-than- temporary impairment was not previously recognized		(20	)		86
Reduction for security sold during the period		—			(7	)
Balance at the end of the period	$	375		$	396

At this time, the Company has no intent to sell any of the impaired Failed Auction Securities and does not believe it is more likely than not the Company will be required to sell any of these securities. If current market conditions deteriorate further, the Company may be required to record additional unrealized losses. If the credit rating of the security deteriorates, the Company may be required to adjust the carrying value of these investments through impairment charges recorded in the Condensed Consolidated Statement of Operations, and any such impairment adjustments may be material.

Based on the Company’s ability to access cash and cash equivalents and its expected operating cash flows, management does not anticipate the current lack of liquidity associated with the Failed Auction Securities held will affect the Company’s ability to execute its current operating plan.

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Product Warranties - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
Guarantees [Abstract]
Warranty period	2 years

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Short-Term and Long-Term Investments - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Unrealized Losses On Short Term And Long Term Investments [Line Items]
Amortized cost of securities	$ 6,730,000	$ 6,820,000
Minimum period for which failed auction securities been in unrealized loss position	12 months
Estimated fair value of securities	5,637,000	5,651,000
Gross unrealized losses	1,096,000	1,175,000
Aggregate credit loss	375,000	395,000	396,000	317,000
Failed Auction Securities [Member]
Unrealized Losses On Short Term And Long Term Investments [Line Items]
Amortized cost of securities	6,000,000	6,000,000
Period for which failed auction securities been in unrealized loss position	Exceeds 12 months
Estimated fair value of securities	4,904,000	4,825,000
Increase in fair value	79,000
Gross unrealized losses	1,096,000	1,175,000
Aggregate credit loss	375,000
Aggregate temporary impairment loss	$ 721,000

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Significant Segment Financial Data

The following table provides significant segment financial data for the three months ended June 30, (in thousands):

	BBU		VI Chip			Picor			Corporate			Eliminations (1)			Total
2014:
Net revenues	$	47,885	$	4,634		$	2,667		$	—		$	(1,825	)	$	53,361
Income (loss) from operations		5,349		(9,406	)		(785	)		(172	)		—			(5,014	)
Total assets		144,592		16,942			4,560			75,182			(83,002	)		158,274
Depreciation and amortization		1,158		788			105			360			—			2,411
2013:
Net revenues	$	40,211	$	6,639		$	2,808		$	—		$	(2,793	)	$	46,865
Income (loss) from operations		2,441		(8,349	)		(811	)		(263	)		—			(6,982	)
Total assets		112,117		17,667			4,790			96,795			(54,101	)		177,268
Depreciation and amortization		1,283		807			111			333			—			2,534

The following table provides significant segment financial data for the six months ended June 30, (in thousands):

	BBU		VI Chip			Picor			Corporate			Eliminations (1)			Total
2014:
Net revenues	$	91,574	$	13,975		$	5,617		$	—		$	(4,572	)	$	106,594
Income (loss) from operations		7,661		(16,253	)		(1,527	)		(334	)		—			(10,453	)
Total assets		144,592		16,942			4,560			75,182			(83,002	)		158,274
Depreciation and amortization		2,351		1,579			206			718			—			4,854
2013:
Net revenues	$	78,413	$	10,046		$	4,590		$	—		$	(4,238	)	$	88,811
Income (loss) from operations		4,590		(17,587	)		(2,015	)		(466	)		—			(15,478	)
Total assets		112,117		17,667			4,790			96,795			(54,101	)		177,268
Depreciation and amortization		2,477		1,708			219			624			—			5,028

(1) The elimination for net revenues is principally related to inter-segment revenues of Picor to BBU and VI Chip and for inter-segment revenues of VI Chip to BBU. The elimination for total assets is principally related to inter-segment accounts receivable due to BBU for the funding of VI Chip and Picor operations.

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Product Warranties - Product Warranty Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Guarantees [Abstract]
Balance at the beginning of the period	$ 249	$ 324	$ 283	$ 364
Accruals for warranties for products sold in the period	60	72	84	101
Fulfillment of warranty obligations	(77)	(63)	(132)	(110)
Revisions of estimated obligations	(7)	(4)	(10)	(26)
Balance at the end of the period	$ 225	$ 329	$ 225	$ 329

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Short-Term and Long-Term Investments - Summary of Available-for-Sale Securities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 6,730	$ 6,820
Gross Unrealized Gains	3	6
Gross unrealized losses	1,096	1,175
Estimated Fair Value	5,637	5,651
Failed Auction Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	6,000	6,000
Gross unrealized losses	1,096	1,175
Estimated Fair Value	4,904	4,825
Brokered Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	730	820
Gross Unrealized Gains	3	6
Estimated Fair Value	$ 733	$ 826

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Short-Term and Long-Term Investments - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities by Contractual Maturities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Available For Sale Securities Debt Maturities [Abstract]
Due in one year or less, Cost	$ 640
Due in two to ten years, Cost	90
Due in twenty to forty years, Cost	6,000
Total Cost	6,730	6,820
Due in one year or less, Estimated Fair Value	642
Due in two to ten years, Estimated Fair Value	91
Due in twenty to forty years, Estimated Fair Value	4,904
Estimated Fair Value	$ 5,637	$ 5,651

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Basis of Presentation

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Basis of Presentation

1. Basis of Presentation

The accompanying unaudited condensed consolidated financial statements of Vicor Corporation (the “Company”) have been prepared in accordance with generally accepted accounting principles for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, these interim financial statements do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.

In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for any other interim period or the year ending December 31, 2014. The balance sheet at December 31, 2013 presented herein has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. For further information, refer to the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 (File No. 0-18277) filed by the Company with the Securities and Exchange Commission.

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Short-Term and Long-Term Investments - Rollforward of Credit (Gain) Loss Recognized in Earnings on Available-for-Sale Auction Rate Securities (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Available For Sale Securities Debt Maturities [Abstract]
Balance at the beginning of the period	$ 395	$ 317
Changes in the amount related to credit (gain) loss for which other-than-temporary impairment was not previously recognized	(20)	86
Reduction for security sold during the period		(7)
Balance at the end of the period	$ 375	$ 396

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Net Loss per Share - Computation of Basic and Diluted Loss per Share (Parenthetical) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Options to purchase shares of Common Stock not included in the computation of diluted income per share	2,038,599	861,958	2,038,599	733,120

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 50,805	$ 56,339
Short-term investments	642	463
Accounts receivable, less allowance of $190 in 2014 and $198 in 2013	27,069	27,683
Inventories, net	29,228	29,696
Deferred tax assets	131	131
Other current assets	4,948	4,212
Total current assets	112,823	118,524
Long-term investments, net	4,995	5,188
Property, plant and equipment, net	38,670	40,092
Other assets	1,786	1,836
Total assets	158,274	165,640
Current liabilities:
Accounts payable	9,221	8,677
Accrued compensation and benefits	8,780	8,104
Accrued expenses	3,586	2,841
Income taxes payable	5	15
Deferred revenue	1,259	1,018
Total current liabilities	22,851	20,655
Long-term deferred revenue	768	974
Long-term income taxes payable	1,346	1,339
Deferred income taxes payable	335	335
Total liabilities	25,300	23,303
Commitments and contingencies (Note 10)
Vicor Corporation stockholders' equity:
Common Stock	392	392
Additional paid-in capital	170,265	169,474
Retained earnings	98,432	108,645
Accumulated other comprehensive loss	(332)	(526)
Treasury stock, at cost	(138,927)	(138,927)
Total Vicor Corporation stockholders' equity	129,948	139,176
Noncontrolling interest	3,026	3,161
Total equity	132,974	142,337
Total liabilities and equity	158,274	165,640
Class B Common Stock [Member]
Vicor Corporation stockholders' equity:
Common Stock	$ 118	$ 118

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Income Taxes - Provision (Benefit) for Income Taxes and Effective Income Tax Rate (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes		$ (2,436)	$ 17	$ (5,931)
Effective income tax rate	0.00%	(34.60%)	0.20%	(38.20%)

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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $) In Thousands, unless otherwise specified	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]
Foreign currency translation gains (losses), tax benefit	$ 0	$ 76	$ 0	$ 217
Recognized income tax provision (benefit)	$ 0	$ 0	$ 0	$ 0

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Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Detail) (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member]	Jun. 30, 2014 Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Earning Maximum Rate Until Maturity [Member]	Jun. 30, 2014 Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Principal Return Prior to Maturity [Member]	Jun. 30, 2014 Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Default [Member]	Jun. 30, 2014 Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Liquidity Risk Premium [Member]	Jun. 30, 2014 Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Recovery Rate in Default [Member]	Jun. 30, 2014 Minimum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Earning Maximum Rate Until Maturity [Member]	Jun. 30, 2014 Minimum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Principal Return Prior to Maturity [Member]	Jun. 30, 2014 Minimum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Default [Member]	Jun. 30, 2014 Minimum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Liquidity Risk Premium [Member]	Jun. 30, 2014 Minimum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Recovery Rate in Default [Member]	Jun. 30, 2014 Maximum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Earning Maximum Rate Until Maturity [Member]	Jun. 30, 2014 Maximum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Principal Return Prior to Maturity [Member]	Jun. 30, 2014 Maximum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Cumulative Probability of Default [Member]	Jun. 30, 2014 Maximum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Liquidity Risk Premium [Member]	Jun. 30, 2014 Maximum [Member] Failed Auction Securities [Member] Significant Unobservable Inputs (Level 3) [Member] Recovery Rate in Default [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	$ 5,637	$ 5,651	$ 4,904
Valuation Technique			Discounted cash flow
Unobservable Input				Cumulative probability of earning the maximum rate until maturity	Cumulative probability of principal return prior to maturity	Cumulative probability of default	Liquidity risk premium	Recovery rate in default
Weighted Average Interest Rate				0.04%	83.42%	16.55%	5.00%	40.00%	0.01%	72.02%	5.17%	5.00%	40.00%	0.07%	94.82%	27.92%	5.00%	40.00%

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on Recurring Basis

Assets measured at fair value on a recurring basis include the following as of June 30, 2014 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of June 30, 2014
Cash Equivalents:
Money market funds	$	12,041	$	—	$	—	$	12,041
Short-term investments:
Brokered certificates of deposit		—		642		—		642
Long-term investments:
Failed Auction Securities		—		—		4,904		4,904
Brokered certificates of deposit		—		91		—		91

Assets measured at fair value on a recurring basis include the following as of December 31, 2013 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of December 31, 2013
Cash Equivalents:
Money market funds	$	12,407	$	—	$	—	$	12,407
Short-term investments:
Brokered certificates of deposit		—		463		—		463
Long-term investments:
Failed Auction Securities		—		—		4,825		4,825
Brokered certificates of deposit		—		363		—		363

Quantitative Information about Level 3 Fair Value Measurements

Quantitative information about Level 3 fair value measurements as of June 30, 2014 are as follows (dollars in thousands):

				Range
		Valuation	Unobservable	(Weighted
	Fair Value	Technique	Input	Average)
Failed Auction Securities	$4,904	Discounted cash flow	Cumulative probability of earning the maximum rate until maturity	0.01% - 0.07% (0.04%)
			Cumulative probability of principal return prior to maturity	72.02% - 94.82% (83.42%)
			Cumulative probability of default	5.17% - 27.92% (16.55%)
			Liquidity risk premium	5.00% - 5.00% (5.00%)
			Recovery rate in default	40.00% - 40.00% (40.00%)

Change in Estimated Fair Values Calculated for Assets Valued on Recurring Basis Utilizing Level 3 Inputs

The following table summarizes the change in the estimated fair values calculated for those assets valued on a recurring basis utilizing Level 3 inputs (i.e., the Failed Auction Securities) for the six months ended June 30, 2014 (in thousands):

Balance at the beginning of the period	$	4,825
Credit gain on available-for-securities included in Other income, net		20
Unrealized gain included in Other comprehensive income (loss)		59
Balance at the end of the period	$	4,904

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Fair Value Measurements - Change in Estimated Fair Values Calculated for Assets Valued on Recurring Basis Utilizing Level 3 Inputs (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]
Balance at the beginning of the period	$ 4,825
Credit gain on available-for-securities included in Other income, net	20
Unrealized gain included in Other comprehensive income (loss)	59
Balance at the end of the period	$ 4,904

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Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Computation of Basic and Diluted Loss per Share

The following table sets forth the computation of basic and diluted loss per share for the three and six months ended June 30 (in thousands, except per share amounts):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Numerator:
Net loss attributable to Vicor Corporation	$	(4,835	)	$	(4,616	)	$	(10,213	)	$	(9,606	)
Denominator:
Denominator for basic loss per share-weighted average shares (1)		38,542			38,538			38,541			39,852
Effect of dilutive securities:
Employee stock options (2)		—			—			—			—
Denominator for diluted loss per share – adjusted weighted-average shares and assumed conversions		38,542			38,538			38,541			39,852
Basic loss per share	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)
Diluted loss per share	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)

(1) Denominator represents weighted average number of shares of Common Stock and Class B Common Stock outstanding.

(2) Options to purchase 2,038,599 shares of Common Stock for the three and six months ended June 30, 2014 were not included in the calculation of net loss per share as the effect would have been antidilutive. Options to purchase 861,958 and 733,120 shares of Common Stock for the three and six months ended June 30, 2013, respectively, were not included in the calculation of net loss per share as the effect would have been antidilutive.

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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Consolidated net loss	$ (10,358)	$ (9,586)
Adjustments to reconcile consolidated net loss to net cash provided by (used for) operating activities:
Depreciation and amortization	4,854	5,028
Stock-based compensation expense	771	1,402
Provision for doubtful accounts	11	190
Decrease in long-term deferred revenue	(69)	(71)
Deferred income taxes		(4,307)
Severance charges		1,361
Excess tax benefit of stock-based compensation		(53)
Gain on disposal of equipment	(6)	(3)
Credit (gain) loss on available-for-sale securities	(20)	79
Increase in long-term income taxes payable	7	21
Change in current assets and liabilities, net	2,589	1,723
Net cash used for operating activities	(2,221)	(4,216)
Investing activities:
Additions to property, plant and equipment	(3,481)	(2,543)
Sales and maturities of investments	90	334
Proceeds from sale of equipment	6	3
(Increase) decrease in other assets	(32)	57
Net cash used for investing activities	(3,417)	(2,149)
Financing activities:
Proceeds from issuance of Common Stock	20	55
Purchases of Common Stock		(17,100)
Excess tax benefit of stock-based compensation		53
Net cash provided by (used for) financing activities	20	(16,992)
Effect of foreign exchange rates on cash	84	(419)
Net decrease in cash and cash equivalents	(5,534)	(23,776)
Cash and cash equivalents at beginning of period	56,339	84,554
Cash and cash equivalents at end of period	$ 50,805	$ 60,778

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 190	$ 198

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2014

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

10. Commitments and Contingencies

At June 30, 2014, the Company had approximately $909,000 of capital expenditure commitments.

On January 28, 2011, SynQor, Inc. (“SynQor”) filed a complaint for patent infringement against Ericsson, Inc. (“Ericsson”), Cisco Systems, Inc. (“Cisco”) and the Company in U.S. District Court for the Eastern District of Texas (“the Texas Action”). This immediately followed a complaint filed by the Company on January 26, 2011, in U.S. District Court for the District of Massachusetts, in which the Company sought a declaratory judgment that its bus converter products do not infringe any valid claim of certain of SynQor’s U.S. patents, and that the claims of those patents are invalid. SynQor and Ericsson subsequently entered into a definitive settlement agreement in May 2011 in which they, among other terms and conditions, agreed to mutual releases and a dismissal with prejudice of all claims asserted against each other in the litigation. With respect to the Company, SynQor’s complaint alleges the Company’s products, including, but not limited to, unregulated bus converters used in intermediate bus architecture power supply systems, infringe certain SynQor patents. SynQor seeks, among other items, an injunction against further infringement and an award of unspecified compensatory and enhanced damages, interest, costs and attorney fees. On February 8, 2011, SynQor filed a motion for preliminary injunction seeking an order enjoining the Company from manufacturing, using, selling, and offering for sale in the United States and/or importing into the United States certain identified unregulated bus converters, as well as any other bus converters not significantly different from those products. On February 17, 2011, the Company withdrew its Massachusetts action without prejudice to allow the litigation to proceed in Texas. On May 16, 2011, SynQor announced it was withdrawing its motion for preliminary injunction against the Company. On September 16, 2011, the U.S. District Court for the Eastern District of Texas issued an order setting a trial date of July 7, 2014. On September 20, 2011, SynQor filed an amended complaint in the Texas Action. The amended complaint repeated the allegations of patent infringement against the Company contained in SynQor’s original complaint, and included additional patent infringement allegations with respect to U.S. Patent No. 8,023,290 (“290 patent”), which was issued on that day. As with SynQor’s original complaint, the amended complaint alleged that the Company’s products, including but not limited to the Company’s unregulated bus converters used in intermediate bus architecture power supply systems, infringed the asserted patents. On October 4, 2011, the Company filed an answer and counterclaims to SynQor’s amended complaint, in which the Company alleges the 290 patent is unenforceable because it was procured through inequitable conduct before the U.S. Patent and Trademark Office and seeks damages against SynQor for SynQor’s unfair and deceptive trade practices and tortious interference with prospective economic advantage in connection with SynQor’s allegations of patent infringement against the Company. On January 2, 2014, the court issued its claim construction order following a claim construction hearing held on December 17, 2013. On January 16, 2014, the Company filed a motion seeking reconsideration of certain aspects of the court’s claim construction ruling. On March 31, 2014, the court issued an order severing the case against the Company and Cisco into two separate matters, with separate trials to be held with respect to SynQor’s claims against Cisco and SynQor’s claims against the Company. The court also has indicated that any trial will be held after September 2014. The Company continues to believe that none of its products, including its unregulated bus converters, infringe any valid claim of the asserted SynQor patents, either alone or when used in an intermediate bus architecture implementation. The Company believes SynQor’s claims lack merit and, therefore, continues to vigorously defend itself against SynQor’s patent infringement allegations. The Company does not believe a loss is probable for this matter. If a loss were to be incurred, though, the Company cannot estimate the amount of possible loss or range of possible loss at this time.

In addition, the Company is involved in certain other litigation and claims incidental to the conduct of its business. While the outcome of lawsuits and claims against the Company cannot be predicted with certainty, management does not expect any current litigation or claims to have a material adverse impact on the Company’s financial position or results of operations.

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Document and Entity Information	6 Months Ended
	Jun. 30, 2014
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Entity Registrant Name	VICOR CORP
Entity Central Index Key	0000751978
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	26,785,123
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	11,758,218

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Segment Information

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Segment Information

11. Segment Information

The Company has organized its business segments according to its key product lines. The Brick Business Unit segment (“BBU”) designs, develops, manufactures and markets the Company’s modular power converters and configurable products, and also includes the operations of the Company’s Westcor division, the six entities comprising Vicor Custom Power, and the BBU operations of Vicor Japan Company, Ltd. (“VJCL”). The VI Chip segment includes VI Chip Corporation, which designs, develops, manufactures and markets the Company’s factorized power architecture (“FPA”) products. The VI Chip segment also includes the VI Chip business conducted through VJCL. The Picor segment includes Picor Corporation, which designs, develops, manufactures and markets integrated circuits and related products for use in a variety of power management and power system applications. Picor develops these products to be sold as part of the Company’s products or to third parties for separate applications.

The Company’s chief operating decision maker evaluates performance and allocates resources based on segment revenues and segment operating income (loss). The operating income (loss) for each segment includes selling, general and administrative and research and development expenses directly attributable to the segment. Certain of the Company’s indirect overhead costs, which include corporate selling, general and administrative expenses, are allocated among the segments based upon an estimate of costs associated with each segment. Assets allocated to each segment are based upon specific identification of such assets, which include accounts receivable, inventories, fixed assets and certain other assets. The Corporate segment consists of those operations and assets shared by all segments. The costs of certain centralized executive and administrative functions are recorded in this segment, as are certain shared assets, most notably cash and cash equivalents, deferred tax assets, long-term investments, the Company’s facilities in Massachusetts, real estate and other assets. The Company’s accounting policies and method of presentation for segments are consistent with that used throughout the Condensed Consolidated Financial Statements.

The following table provides significant segment financial data for the three months ended June 30, (in thousands):

	BBU		VI Chip			Picor			Corporate			Eliminations (1)			Total
2014:
Net revenues	$	47,885	$	4,634		$	2,667		$	—		$	(1,825	)	$	53,361
Income (loss) from operations		5,349		(9,406	)		(785	)		(172	)		—			(5,014	)
Total assets		144,592		16,942			4,560			75,182			(83,002	)		158,274
Depreciation and amortization		1,158		788			105			360			—			2,411
2013:
Net revenues	$	40,211	$	6,639		$	2,808		$	—		$	(2,793	)	$	46,865
Income (loss) from operations		2,441		(8,349	)		(811	)		(263	)		—			(6,982	)
Total assets		112,117		17,667			4,790			96,795			(54,101	)		177,268
Depreciation and amortization		1,283		807			111			333			—			2,534

The following table provides significant segment financial data for the six months ended June 30, (in thousands):

	BBU		VI Chip			Picor			Corporate			Eliminations (1)			Total
2014:
Net revenues	$	91,574	$	13,975		$	5,617		$	—		$	(4,572	)	$	106,594
Income (loss) from operations		7,661		(16,253	)		(1,527	)		(334	)		—			(10,453	)
Total assets		144,592		16,942			4,560			75,182			(83,002	)		158,274
Depreciation and amortization		2,351		1,579			206			718			—			4,854
2013:
Net revenues	$	78,413	$	10,046		$	4,590		$	—		$	(4,238	)	$	88,811
Income (loss) from operations		4,590		(17,587	)		(2,015	)		(466	)		—			(15,478	)
Total assets		112,117		17,667			4,790			96,795			(54,101	)		177,268
Depreciation and amortization		2,477		1,708			219			624			—			5,028

(1) The elimination for net revenues is principally related to inter-segment revenues of Picor to BBU and VI Chip and for inter-segment revenues of VI Chip to BBU. The elimination for total assets is principally related to inter-segment accounts receivable due to BBU for the funding of VI Chip and Picor operations.

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Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Net revenues	$ 53,361	$ 46,865	$ 106,594	$ 88,811
Cost of revenues	30,699	28,404	61,140	53,743
Gross margin	22,662	18,461	45,454	35,068
Operating expenses:
Selling, general and administrative	17,033	15,455	35,013	29,342
Research and development	10,643	9,988	20,894	19,843
Severance charges				1,361
Total operating expenses	27,676	25,443	55,907	50,546
Loss from operations	(5,014)	(6,982)	(10,453)	(15,478)
Other income, net:
Total unrealized gains (losses) on available-for-sale securities, net	40	(14)	79	38
Portion of gains recognized in other comprehensive income (loss)	(20)	(66)	(59)	(117)
Net credit gains (losses) recognized in earnings	20	(80)	20	(79)
Other income, net	62	26	92	40
Total other income, net	82	(54)	112	(39)
Loss before income taxes	(4,932)	(7,036)	(10,341)	(15,517)
Provision (benefit) for income taxes		(2,436)	17	(5,931)
Consolidated net loss	(4,932)	(4,600)	(10,358)	(9,586)
Less: Net income (loss) attributable to noncontrolling interest	(97)	16	(145)	20
Net loss attributable to Vicor Corporation	$ (4,835)	$ (4,616)	$ (10,213)	$ (9,606)
Net loss per common share attributable to Vicor Corporation:
Basic	$ (0.13)	$ (0.12)	$ (0.26)	$ (0.24)
Diluted	$ (0.13)	$ (0.12)	$ (0.26)	$ (0.24)
Shares used to compute net loss per share attributable to Vicor Corporation:
Basic	38,542	38,538	38,541	39,852
Diluted	38,542	38,538	38,541	39,852

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Net Loss per Share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Net Loss per Share

5. Net Loss per Share

The following table sets forth the computation of basic and diluted loss per share for the three and six months ended June 30 (in thousands, except per share amounts):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Numerator:
Net loss attributable to Vicor Corporation	$	(4,835	)	$	(4,616	)	$	(10,213	)	$	(9,606	)
Denominator:
Denominator for basic loss per share-weighted average shares (1)		38,542			38,538			38,541			39,852
Effect of dilutive securities:
Employee stock options (2)		—			—			—			—
Denominator for diluted loss per share – adjusted weighted-average shares and assumed conversions		38,542			38,538			38,541			39,852
Basic loss per share	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)
Diluted loss per share	$	(0.13	)	$	(0.12	)	$	(0.26	)	$	(0.24	)

(1) Denominator represents weighted average number of shares of Common Stock and Class B Common Stock outstanding.

(2) Options to purchase 2,038,599 shares of Common Stock for the three and six months ended June 30, 2014 were not included in the calculation of net loss per share as the effect would have been antidilutive. Options to purchase 861,958 and 733,120 shares of Common Stock for the three and six months ended June 30, 2013, respectively, were not included in the calculation of net loss per share as the effect would have been antidilutive.

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

4. Stock-Based Compensation

The Company uses the Black-Scholes option pricing model to calculate the fair value of stock option awards as of their grant date. Stock-based compensation expense for the three and six months ended June 30 was as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Cost of revenues	$	64	$	40	$	100	$	44
Selling, general and administrative		373		998		564		1,181
Research and development		100		101		107		177
Total stock-based compensation	$	537	$	1,139	$	771	$	1,402

Stock-based compensation was lower during the three and six months ended June 30, 2014, compared to the same periods in 2013, due to the completion of an exchange of outstanding employee stock options in the second quarter of 2013.

On December 31, 2010, the Company granted 2,984,250 non-qualified stock options under the VI Chip 2007 Stock Option and Incentive Plan with performance-based vesting provisions tied to achievement of certain margin targets by the VI Chip subsidiary.

As of December 31, 2010, the Company determined it was probable the margin targets could be achieved and, accordingly, began recording stock-based compensation expense relating to these options beginning January 1, 2011. This determination remains the same as of June 30, 2014 and, accordingly, expense has been recorded through that date. The unrecognized compensation expense for these performance-based options was approximately $683,000 as of June 30, 2014.

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense

Stock-based compensation expense for the three and six months ended June 30 was as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Cost of revenues	$	64	$	40	$	100	$	44
Selling, general and administrative		373		998		564		1,181
Research and development		100		101		107		177
Total stock-based compensation	$	537	$	1,139	$	771	$	1,402

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Risks and Uncertainties

6 Months Ended

Jun. 30, 2014

Risks And Uncertainties [Abstract]

Risks and Uncertainties

12. Risks and Uncertainties

On July 16, 2014, the U.S. Department of the Treasury imposed new economic sanctions against Russian entities, targeting major banks and energy companies and a significant portion of the Russian defense industry, along with certain other parties. Although the Company sells its products in Russia through three independent distributors, against which the sanctions are not applicable, certain end-customers of these independent distributors have been identified as sanctioned entities. As of June 30, 2014, while backlog indirectly associated with these sanctioned entities was negligible, outstanding accounts receivable due from an independent distributor associated with sales to a sanctioned end-customer totaled approximately $906,000. The Company has no reason to believe it will not collect this amount from its independent distributor, although, given the current circumstances, management will carefully monitor the collectability of the outstanding amount, as well as the compliance of its distribution partners in the Russian market with U.S. trade restrictions, including the recent sanctions.

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Product Warranties

6 Months Ended

Jun. 30, 2014

Guarantees [Abstract]

Product Warranties

8. Product Warranties

The Company generally offers a two-year warranty for all of its products. The Company provides for the estimated cost of product warranties at the time product revenue is recognized. Factors that affect the Company’s warranty reserves include the number of units sold, historical and anticipated rates of warranty returns, and the cost per return. The Company assesses the adequacy of the warranty reserves and adjusts the amounts as necessary. Warranty obligations are included in “Accrued expenses” in the accompanying Condensed Consolidated Balance Sheets.

Product warranty activity for the three and six months ended June 30, was as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Balance at the beginning of the period	$	249		$	324		$	283		$	364
Accruals for warranties for products sold in the period		60			72			84			101
Fulfillment of warranty obligations		(77	)		(63	)		(132	)		(110	)
Revisions of estimated obligations		(7	)		(4	)		(10	)		(26	)
Balance at the end of the period	$	225		$	329		$	225		$	329

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Inventories

6 Months Ended

Jun. 30, 2014

Inventory Disclosure [Abstract]

Inventories

6. Inventories

Inventories are valued at the lower of cost (determined using the first-in, first-out method) or net realizable value. Fixed production overhead is allocated to the inventory cost per unit based on the normal capacity of the production facilities. Abnormal production costs, including fixed cost variances from normal production capacity, if any, are charged to cost of revenues in the period incurred. All shipping and handling costs incurred in connection with the sale of products are included in cost of revenues.

The Company provides reserves for inventories estimated to be excess, obsolete or unmarketable. The Company’s estimation process for assessing net realizable value is based upon its known backlog, projected future demand and expected market conditions, and historical usage. If the Company’s estimated demand and/or market expectation were to change or if product sales were to decline, the Company’s estimation process may cause larger inventory reserves to be recorded, resulting in larger charges to cost of revenues.

Inventories were as follows (in thousands):

	June 30, 2014		December 31, 2013
Raw materials	$	19,789	$	19,744
Work-in-process		3,881		3,979
Finished goods		5,558		5,973
Net balance	$	29,228	$	29,696

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Other Investments

6 Months Ended

Jun. 30, 2014

Text Block [Abstract]

Other Investments

7. Other Investments

The Company’s gross investment in non-voting convertible preferred stock of Great Wall Semiconductor Corporation (“GWS”) totaled $5,000,000 as of June 30, 2014 and December 31, 2013, giving the Company an approximately 27% ownership interest in GWS. GWS and its subsidiary design and sell semiconductors, conduct research and development activities, develop and license patents, and litigate against those who infringe upon its patented technologies. A director of the Company is the founder, Chairman of the Board, President and Chief Executive Officer (“CEO”), as well as the majority voting shareholder, of GWS. The Company and GWS are parties to an intellectual property cross-licensing agreement, a license agreement and two supply agreements under which the Company purchases certain components from GWS. Purchases from GWS totaled approximately $1,496,000 and $433,000 for the six months ended June 30, 2014, and 2013, respectively. The Company owed GWS approximately $166,000 and $152,000 as of June 30, 2014 and December 31, 2013, respectively.

The Company accounts for its investment in GWS under the equity method of accounting. The Company has determined that, while GWS is a variable interest entity, the Company is not the primary beneficiary. The key factors in the Company’s assessment were that the CEO of GWS has: (i) the power to direct the activities of GWS that most significantly impact its economic performance, and (ii) has an obligation to absorb losses or the right to receive benefits from GWS, respectively, that could potentially be significant to GWS.

The balance in the Company’s net investment in GWS was zero as of June 30, 2014, and December 31, 2013.

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Income Taxes

6 Months Ended

Jun. 30, 2014

Income Tax Disclosure [Abstract]

Income Taxes

9. Income Taxes

The tax provision is based on the estimated annual effective tax rate for the year, which includes estimated federal, state and foreign income taxes (benefit) on the Company’s projected annual pre-tax income (loss) and estimated federal and state income taxes for certain noncontrolling interest subsidiaries that are not part of the Company’s consolidated income tax returns.

The provision (benefit) for income taxes and the effective income tax rate for the three and six months ended June 30, were as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Provision (benefit) for income taxes	$	—		$	(2,436	)	$	17		$	(5,931	)
Effective income tax rate		0.0	%		(34.6	%)		0.2	%		(38.2	%)

For the three and six months ended June 30, 2014, no tax benefit could be recognized for the majority of the Company’s losses due to a full valuation allowance against all domestic deferred tax assets. The provision for the six months ended June 30, 2014 is primarily due to state taxes. For the three and six months ended June 30, 2013, a net income tax benefit was recorded primarily due to an increase in net federal deferred tax assets not covered by a valuation allowance at that time, a potential net operating loss carryback for federal income tax purposes and the recognition of a benefit from the federal research tax credit for 2012 of $549,000, as a discrete item in the first quarter of 2013. The federal research tax credit for 2012 and 2013 was extended on January 2, 2013 pursuant to the American Taxpayer Relief Act of 2012.

As of June 30, 2014, the Company has a valuation allowance of approximately $20,194,000 primarily against all domestic net deferred tax assets, for which realization cannot be considered more likely than not at this time. Management assesses the need for the valuation allowance on a quarterly basis. In assessing the need for a valuation allowance, the Company considers all positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies, and past financial performance. In 2013, the Company recorded an increase to the valuation allowance of approximately $10,241,000 for all remaining domestic net deferred tax assets not previously covered by a valuation allowance due to the following factors: (1) the Company’s forecast of future taxable income, of the appropriate nature, based on its quarterly assessment was not sufficient to support the recoverability of the remaining domestic deferred tax assets; (2) recent cumulative losses and the Company’s projection of continued losses into 2014; (3) while the Company has the ability to carryback federal net operating losses or credits to utilize against federal taxable income, it will generate only $1,600,000 in cash refunds; and (4) the lack of prudent and feasible tax planning strategies. These assessment factors remain unchanged, as does management’s conclusion concerning the need for a full valuation allowance against all domestic net deferred tax assets, as of June 30, 2014. The valuation allowance against these deferred tax assets may require adjustment in the future based on changes in the mix of temporary differences, changes in tax laws, and operating performance. If and when management determines the valuation allowance should be released, the adjustment would result in a tax benefit in the Condensed Consolidated Statements of Operations and may include a portion to be accounted for through “Additional paid-in capital”, a component of Stockholders’ Equity. The amount of the tax benefit to be recorded in a particular quarter could be material.

In August 2013, the Company received notice from the Internal Revenue Service that its federal corporate tax returns for the tax years 2010 and 2011 had been selected for examination. The examination fieldwork has been completed and the Company received the examination report in early July 2014. Based on the report, the results of the examination will not have a material impact on the Company’s financial statements. The Company expects the report will be finalized and examination officially closed in the third quarter of 2014.

The Company’s subsidiary in Italy, Vicor Italy S.r.l. (“Vicor Italy”), recently underwent a tax inspection for tax years 2009 – 2013, covering corporation, regional and value added taxes. Vicor Italy received a preliminary tax audit report dated June 30, 2014. The Company is in the process of evaluating the report and, while management believes it is too early to determine the likelihood or amount of potential liability at this time, it does not believe the ultimate impact of this matter will be material to the Company’s financial statements.

There are no other income tax examinations or audits currently in process.

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Fair Value Measurements - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]
Percent of credit loss	6.30%
Rate of return required	5.00%
Estimated timeframe for auctions of securities minimum	3 years
Estimated timeframe for auctions of securities maximum	5 years
Percentage of liquidity risk premium	5.00%
Increase or decrease in the liquidity risk premium	1.00%
Increase or decrease, respectively, the fair value of the Failed Auction Securities	$ 400,000
Fair value transfers between Level 1 and Level 2	$ 0

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Short-Term and Long-Term Investments (Tables)

6 Months Ended

Jun. 30, 2014

Investments Debt And Equity Securities [Abstract]

Summary of Available-for-Sale Securities

The following is a summary of available-for-sale securities (in thousands):

			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
June 30, 2014	Cost		Gains		Losses		Value
Failed Auction Securities	$	6,000	$	—	$	1,096	$	4,904
Brokered certificates of deposit		730		3		—		733
	$	6,730	$	3	$	1,096	$	5,637
			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
December 31, 2013	Cost		Gains		Losses		Value
Failed Auction Securities	$	6,000	$	—	$	1,175	$	4,825
Brokered certificates of deposit		820		6		—		826
	$	6,820	$	6	$	1,175	$	5,651

Amortized Cost and Estimated Fair Value of Available-for-Sale Securities by Contractual Maturities

The amortized cost and estimated fair value of available-for-sale securities on June 30, 2014, by contractual maturities, are shown below (in thousands):

			Estimated
	Cost		Fair Value
Due in one year or less	$	640	$	642
Due in two to ten years		90		91
Due in ten to twenty years		—		—
Due in twenty to forty years		6,000		4,904
	$	6,730	$	5,637

Rollforward of Credit (Gain) Loss Recognized in Earnings on Available-for-Sale Auction Rate Securities

The following table represents a rollforward of the activity related to the credit (gain) loss recognized in earnings on available-for-sale auction rate securities held by the Company for the six months ended June 30 (in thousands):

	2014			2013
Balance at the beginning of the period	$	395		$	317
Changes in the amount related to credit (gain) loss for which other-than- temporary impairment was not previously recognized		(20	)		86
Reduction for security sold during the period		—			(7	)
Balance at the end of the period	$	375		$	396

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Product Warranties (Tables)

6 Months Ended

Jun. 30, 2014

Guarantees [Abstract]

Product Warranty Activity

Product warranty activity for the three and six months ended June 30, was as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Balance at the beginning of the period	$	249		$	324		$	283		$	364
Accruals for warranties for products sold in the period		60			72			84			101
Fulfillment of warranty obligations		(77	)		(63	)		(132	)		(110	)
Revisions of estimated obligations		(7	)		(4	)		(10	)		(26	)
Balance at the end of the period	$	225		$	329		$	225		$	329

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Segment Information - Significant Segment Financial Data (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net revenues	$ 53,361	$ 46,865	$ 106,594	$ 88,811
Income (loss) from operations	(5,014)	(6,982)	(10,453)	(15,478)
Total assets	158,274	177,268	158,274	177,268	165,640
Depreciation and amortization	2,411	2,534	4,854	5,028
Operating Segments [Member] | BBU [Member]
Segment Reporting Information [Line Items]
Net revenues	47,885	40,211	91,574	78,413
Income (loss) from operations	5,349	2,441	7,661	4,590
Total assets	144,592	112,117	144,592	112,117
Depreciation and amortization	1,158	1,283	2,351	2,477
Operating Segments [Member] | VI Chip [Member]
Segment Reporting Information [Line Items]
Net revenues	4,634	6,639	13,975	10,046
Income (loss) from operations	(9,406)	(8,349)	(16,253)	(17,587)
Total assets	16,942	17,667	16,942	17,667
Depreciation and amortization	788	807	1,579	1,708
Operating Segments [Member] | Picor [Member]
Segment Reporting Information [Line Items]
Net revenues	2,667	2,808	5,617	4,590
Income (loss) from operations	(785)	(811)	(1,527)	(2,015)
Total assets	4,560	4,790	4,560	4,790
Depreciation and amortization	105	111	206	219
Operating Segments [Member] | Corporate [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations	(172)	(263)	(334)	(466)
Total assets	75,182	96,795	75,182	96,795
Depreciation and amortization	360	333	718	624
Eliminations [Member]
Segment Reporting Information [Line Items]
Net revenues	(1,825)	(2,793)	(4,572)	(4,238)
Total assets	$ (83,002)	$ (54,101)	$ (83,002)	$ (54,101)

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Inventories - Summary of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 19,789	$ 19,744
Work-in-process	3,881	3,979
Finished goods	5,558	5,973
Net balance	$ 29,228	$ 29,696

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Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	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]
Consolidated net loss	$ (4,932)		$ (4,600)		$ (10,358)		$ (9,586)
Foreign currency translation gains (losses), net of tax provision (benefit)	71	[1]	(135)	[1]	148	[1]	(403)	[1]
Unrealized gains on available-for-sale securities, net of tax	19	[2]	64	[2]	56	[2]	115	[2]
Other comprehensive income (loss)	90		(71)		204		(288)
Consolidated comprehensive loss	(4,842)		(4,671)		(10,154)		(9,874)
Less: Comprehensive loss attributable to noncontrolling interest	(92)		(1)		(135)		(25)
Comprehensive loss attributable to Vicor Corporation	$ (4,750)		$ (4,670)		$ (10,019)		$ (9,849)

[1] Net of tax benefit of $0 and $76 for the three months ended June 30, 2014 and 2013, respectively. Net of tax benefit of $0 and $217 for the six months ended June 30, 2014 and 2013, respectively.

[2] The deferred tax assets associated with the unrealized gains on available-for-sale securities are completely offset by a tax valuation allowance as of June 30, 2014 and 2013. Therefore, there is no net income tax provision (benefit) recognized for the three and six months ended June 30, 2014 and 2013.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

3. Fair Value Measurements

The Company accounts for certain financial assets at fair value, defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions market participants would use in pricing an asset or liability. A three-level hierarchy is used to show the extent and level of judgment used to estimate fair value measurements.

Assets measured at fair value on a recurring basis include the following as of June 30, 2014 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of June 30, 2014
Cash Equivalents:
Money market funds	$	12,041	$	—	$	—	$	12,041
Short-term investments:
Brokered certificates of deposit		—		642		—		642
Long-term investments:
Failed Auction Securities		—		—		4,904		4,904
Brokered certificates of deposit		—		91		—		91

Assets measured at fair value on a recurring basis include the following as of December 31, 2013 (in thousands):

	Using
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value as of December 31, 2013
Cash Equivalents:
Money market funds	$	12,407	$	—	$	—	$	12,407
Short-term investments:
Brokered certificates of deposit		—		463		—		463
Long-term investments:
Failed Auction Securities		—		—		4,825		4,825
Brokered certificates of deposit		—		363		—		363

The Company has brokered certificates of deposit classified as Level 2 because the fair value for these investments has been determined utilizing observable inputs from non-active markets. The fair values fluctuate with changes in market interest rates obtained from information available in publicly quoted markets. Management tested the reported fair values by comparing them to net present value calculations utilizing a discount rate based on U.S. Treasury bill and bond yields for similar maturities.

As of June 30, 2014, there was insufficient observable auction rate security market information available to determine the fair value of the Failed Auction Securities using Level 1 or Level 2 inputs. As such, the Company’s investments in Failed Auction Securities were deemed to require valuation using Level 3 inputs. Management, after consulting with advisors, valued the Failed Auction Securities using analyses and pricing models similar to those used by market participants (i.e., buyers, sellers, and the broker-dealers responsible for execution of the Dutch auction pricing mechanism by which each issue’s interest rate was set). Management utilized a probability weighted discounted cash flow (“DCF”) model to determine the estimated fair value of these securities as of June 30, 2014. The major assumptions used in preparing the DCF model included: estimates for the amount and timing of future interest and principal payments based on default probability assumptions used to measure the credit loss of 6.3%; the rate of return required by investors to own these securities in the current environment, which management estimates to be 5.0% above the risk free rate of return; and an estimated timeframe of three to five years for successful auctions for these securities to occur. In making these assumptions, management considered relevant factors including: the formula applicable to each security defining the interest rate paid to investors in the event of a failed auction (the “Penalty Rate”); forward projections of the interest rate benchmarks specified in such formulas; the likely timing of principal repayments; the probability of full repayment considering the guarantees by the U.S. Department of Education of the underlying student loans, guarantees by other third parties, and additional credit enhancements provided through other means; and publicly available pricing data for recently issued student loan asset-backed securities not subject to auctions. In developing its estimate of the rate of return required by investors to own these securities, management compared the Penalty Rates of the Failed Auction Securities with yields of actively traded long-term bonds with similar characteristics and, reflecting the limited liquidity for auction rate securities and the discounts to par value seen in recent tender offers by issuers and arms’ length market transactions between informed buyers and sellers, estimated the implied yield (i.e., the discount to par value) necessary to complete a sale of the Failed Auction Securities. Management has calculated an increase or decrease in the liquidity risk premium of 5.0% referenced above of 1.0% (i.e., 100 basis points) as used in the model, would decrease or increase, respectively, the fair value of the Failed Auction Securities by approximately $400,000.

For purposes of the valuation process for the Failed Auction Securities, “management” consists of senior members of the Company’s finance department. The fair value measurements for the Failed Auction Securities are reviewed and updated on a quarterly basis. The calculations are prepared by the Company’s Corporate Controller, in conjunction with information provided by its valuation advisors, and include the development and substantiation of the unobservable inputs. The methodology, assumptions, and calculations are reviewed and approved by the Company’s Chief Financial Officer and Chief Accounting Officer.

The significant unobservable inputs used in the fair value measurement of the Company’s Failed Auction Securities are the cumulative probability of earning the maximum rate until maturity, the cumulative probability of principal return prior to maturity, the cumulative probability of default, the liquidity risk premium, and the recovery rate in default. Significant increases (decreases) in any of those inputs in isolation would result in changes in fair value measurement. Significant increases (decreases) in the cumulative probability of earning the maximum rate until maturity, the cumulative probability of principal return prior to maturity, and the recovery rate in default would result in a higher (lower) fair value measurement, while increases (decreases) in the cumulative probability of default and the liquidity risk premium would result in a lower (higher) fair value measurement.

Generally, the interrelationships are such that a change in the assumption used for the cumulative probability of principal return prior to maturity is accompanied by a directionally similar change in the assumption used for the cumulative probability of earning the maximum rate until maturity and a directionally opposite change in the assumptions used for the cumulative probability of default and the liquidity risk premium. The recovery rate in default is somewhat independent and based upon the securities’ specific underlying assets and published recovery rate indices.

Quantitative information about Level 3 fair value measurements as of June 30, 2014 are as follows (dollars in thousands):

				Range
		Valuation	Unobservable	(Weighted
	Fair Value	Technique	Input	Average)
Failed Auction Securities	$4,904	Discounted cash flow	Cumulative probability of earning the maximum rate until maturity	0.01% - 0.07% (0.04%)
			Cumulative probability of principal return prior to maturity	72.02% - 94.82% (83.42%)
			Cumulative probability of default	5.17% - 27.92% (16.55%)
			Liquidity risk premium	5.00% - 5.00% (5.00%)
			Recovery rate in default	40.00% - 40.00% (40.00%)

The following table summarizes the change in the estimated fair values calculated for those assets valued on a recurring basis utilizing Level 3 inputs (i.e., the Failed Auction Securities) for the six months ended June 30, 2014 (in thousands):

Balance at the beginning of the period	$	4,825
Credit gain on available-for-securities included in Other income, net		20
Unrealized gain included in Other comprehensive income (loss)		59
Balance at the end of the period	$	4,904

There were no transfers between Level 1 and Level 2 of the fair value hierarchy during the six months ended June 30, 2014.

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Income Taxes (Tables)

6 Months Ended

Jun. 30, 2014

Income Tax Disclosure [Abstract]

Provision (Benefit) for Income Taxes and Effective Income Tax Rate

The provision (benefit) for income taxes and the effective income tax rate for the three and six months ended June 30, were as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
Provision (benefit) for income taxes	$	—		$	(2,436	)	$	17		$	(5,931	)
Effective income tax rate		0.0	%		(34.6	%)		0.2	%		(38.2	%)

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Stock-Based Compensation - Additional Information (Detail) (2007 VI Chip Plan [Member], USD $)	Jun. 30, 2014	Dec. 31, 2010
2007 VI Chip Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-qualified stock options		2,984,250
Unrecognized compensation cost related to performance-based stock options	$ 683,000

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Impact of Recently Issued Accounting Standards

6 Months Ended

Jun. 30, 2014

Accounting Changes And Error Corrections [Abstract]

Impact of Recently Issued Accounting Standards

13. Impact of Recently Issued Accounting Standards

In May 2014, the Financial Accounting Standards Board (“FASB”) issued new guidance for revenue recognition, which will require an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The new guidance will replace most existing revenue recognition guidance in U.S. Generally Accepted Accounting Principles when it becomes effective which, for the Company, will be on January 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect the new guidance will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

Effective January 1, 2014, the Company adopted new accounting guidance related to the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The guidance requires an unrecognized tax benefit to be presented as a decrease in a deferred tax asset where a net operating loss, a similar tax loss, or a tax credit carryforward exists and certain criteria are met. The adoption of this new guidance did not impact the Company’s financial position or results of operations.