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Stock-Based Compensation - Additional Information (Detail) (USD $) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  | 1 Months Ended | 6 Months Ended |  | 6 Months Ended
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Jun. 17, 2013 Participant | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 21, 2013 Two Thousand Plan [Member] | May 14, 2013 Two Thousand Plan [Member] | Jun. 30, 2013 Two Thousand Plan [Member] | Jun. 30, 2013 Two Thousand Plan [Member] Employees and Directors [Member] Age | Jun. 30, 2013 Performance Based Options [Member] | Jun. 30, 2013 Vi Chip 2007 Stock Option and Incentive Plan with Performance-Based Vesting Provisions [Member] | Jun. 30, 2013 Vicor Corporation Amended and Restated 2000 Stock Option and Incentive Plan, with Performance-Based Vesting Provisions [Member] | Jun. 30, 2013 Tranches One [Member] Performance Based Options [Member] | Jun. 30, 2013 Tranches One [Member] Time Based Option [Member] | Jun. 30, 2013 Tranches Two [Member] Performance Based Options [Member] | Jun. 30, 2013 Tranches Three [Member] Performance Based Options [Member] | Jun. 30, 2013 Tranche Four [Member] Performance Based Options [Member] | Jun. 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 |  |  |  |  |  |  |  |
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 of these performance-based options |  | 318,000 |  | 318,000 |  |  |  |  |  |  |  |  | 813,000 | 417,000 |  |  |  |  |  |
Aggregate expenses |  | 1,139,000 | 352,000 | 1,402,000 | 670,000 |  |  |  |  |  |  | 2,300,000 |  |  |  |  |  |  |  |
Age of employees |  |  |  |  |  |  |  |  |  |  | 62.5 |  |  |  |  |  |  |  |  |
Immediate expense recognition |  |  |  |  |  |  |  |  |  | $ 190,000 | $ 450,000 |  |  |  |  |  |  |  |  |
Exercise price of options awarded |  |  |  |  |  |  |  | $ 5.67 | $ 5.35 |  |  |  |  |  |  |  |  |  |  |
Common stock options awarded |  |  |  |  |  |  |  | 70,552 | 150,000 |  |  |  |  |  |  |  |  |  |  |
Non-qualified stock options |  |  |  |  |  | 2,984,250 | 1,243,750 |  |  |  |  | 66,500 |  |  |  |  |  |  |  |

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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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