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Stock-Based Compensation and Employee Benefit Plans - Summary of the Activity under the Vicor Stock Option Plans (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Options Outstanding, Exercised (2,430)
Vicor [Member]
  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Options Outstanding, Beginning balance 1,796,475
Options Outstanding, Granted 1,819,345
Options Outstanding, Forfeited and expired (1,624,142)
Options Outstanding, Exercised (2,430)
Options Outstanding, Ending balance 1,989,248
Options Outstanding, Exercisable 54,284
Options Outstanding, Vested or expected to vest 1,709,313
Weighted Average Exercise Price, Beginning balance $ 12.99
Weighted Average Exercise Price, Granted $ 7.43
Weighted Average Exercise Price, Forfeited and expired $ 13.25
Weighted Average Exercise Price, Exercised $ 5.41
Weighted Average Exercise Price, Ending balance $ 7.71
Weighted Average Exercise Price, Exercisable $ 9.72
Weighted Average Exercise Price, Vested or expected to vest $ 7.60
Weighted-Average Remaining Contractual Life in Years, Outstanding 9 years 2 months 5 days
Weighted-Average Remaining Contractual Life in Years, Exercisable 5 years 3 months 11 days
Weighted-Average Remaining Contractual Life in Years, Vested or expected to vest 9 years 2 months 5 days
Aggregate Intrinsic Value, Outstanding $ 11,399
Aggregate Intrinsic Value, Exercisable 217
Aggregate Intrinsic Value, Vested or expected to vest $ 9,983