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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Net revenues $ 65,269 $ 54,462
Cost of revenues 35,058 30,810
Gross margin 30,211 23,652
Operating expenses:    
Selling, general and administrative 15,399 14,023
Research and development 11,126 11,007
Total operating expenses 26,525 25,030
Income (loss) from operations 3,686 (1,378)
Other income (expense), net:    
Total unrealized gains on available-for-sale securities, net 23 18
Portion of losses recognized in other comprehensive income (loss) (21) (15)
Net credit gains recognized in earnings 2 3
Other income (expense), net 428 322
Total other income (expense), net 430 325
Income (loss) before income taxes 4,116 (1,053)
Less: Provision (benefit) for income taxes 134 (99)
Consolidated net income (loss) 3,982 (954)
Less: Net income attributable to noncontrolling interest 39 20
Net income (loss) attributable to Vicor Corporation $ 3,943 $ (974)
Net income (loss) per common share attributable to Vicor Corporation:    
Basic $ 0.10 $ (0.02)
Diluted $ 0.10 $ (0.02)
Shares used to compute net income (loss) per common share attributable to Vicor Corporation:    
Basic 39,479 39,070
Diluted 40,167 39,070