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Stock-Based Compensation - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended				1 Months Ended		9 Months Ended						9 Months Ended
	Jun. 17, 2013 Participant	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2010	Sep. 30, 2010	May 14, 2013 Two Thousand Plan [Member]	Jun. 21, 2013 Two Thousand Plan [Member]	Sep. 30, 2013 Two Thousand Plan [Member]	Sep. 30, 2013 Two Thousand Plan [Member] Employees and Directors [Member]	Sep. 30, 2013 Performance Based Options [Member]	Sep. 30, 2013 Time Based Option [Member]	Sep. 30, 2013 Vicor Corporation Amended and Restated 2000 Stock Option and Incentive Plan, with Performance-Based Vesting Provisions [Member]	Sep. 30, 2013 Vi Chip 2007 Stock Option and Incentive Plan with Performance-Based Vesting Provisions [Member]	Sep. 30, 2013 Tranches One [Member] Performance Based Options [Member]	Sep. 30, 2013 Tranches One [Member] Time Based Option [Member]	Sep. 30, 2013 Tranches Two [Member] Performance Based Options [Member]	Sep. 30, 2013 Tranches Three [Member] Performance Based Options [Member]	Sep. 30, 2013 Tranche Four [Member] Performance Based Options [Member]	Sep. 30, 2013 Tranche Five [Member] Performance Based Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible participants	638
Options to purchase shares of Common Stock				1,531,077
Percentage of common stock	91.00%
Replacement option vesting period				5 years
Replacement option expiration period				10 years
Time-Based eligible Option exercise price												$ 6.29	$ 6.29
Common stock exercise price percentage																120.00%	120.00%	140.00%	160.00%	180.00%	200.00%
Common stock sales price																$ 6.29		$ 7.34	$ 8.38	$ 9.43	$ 10.48
Incremental expenses				$ 365,000						$ 208,000	$ 625,000
Unrecognized compensation expense		318,000		318,000								2,047,000		414,000	777,000
Aggregate expenses		491,000	300,000	1,893,000	970,000							2,300,000
Age of employees											62 years 6 months
Immediate expense recognition										$ 190,000	$ 450,000
Exercise price of options awarded								$ 5.35	$ 5.67
Common stock options awarded								150,000	70,552
Non-qualified stock options						2,984,250	1,243,750					66,000

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Purchase price of common stock expressed as a percentage of its fair value.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Age of employees or directors.

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Number of eligible participants accepted option exchange offer.

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