XML 58 R44.htm IDEA: XBRL DOCUMENT v3.3.1.900
Significant Accounting Policies - Computation Of Basic And Diluted Net Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Numerator:                    
Net income (loss) attributable to Vicor Corporation $ (1,752) $ 2,503 $ 805 $ 3,371 $ (3,674) $ (4,835) $ (5,378) $ 4,927 $ (13,887) $ (23,640)
Denominator:                    
Denominator for basic net income (loss) per share-weighted average shares               38,754 38,569 39,195
Effect of dilutive securities:                    
Employee stock options               392    
Denominator for diluted net income (loss) per share - adjusted weighted-average shares and assumed conversions               39,146 38,569 39,195
Basic net income (loss) per share               $ 0.13 $ (0.36) $ (0.60)
Diluted net income (loss) per share               $ 0.13 $ (0.36) $ (0.60)