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Condensed Consolidated Statements of Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Treasury Stock [Member]
Total Vicor Corporation Stockholders' Equity [Member]
Noncontrolling Interest [Member]
Class B Common Stock [Member]
Common Stock [Member]
Beginning Balance at Dec. 31, 2020 $ 351,155 $ 433 $ 328,392 $ 161,008 $ (204) $ (138,927) $ 350,820 $ 335 $ 118
Issuance of Common Stock under employee stock plans 8,621 4 8,617       8,621    
Stock-based compensation expense 5,005   5,005       5,005    
Components of comprehensive income (loss), net of tax:                  
Net income (loss) 47,730     47,745     47,745 (15)  
Other comprehensive income (loss) (857)       (836)   (836) (21)  
Total comprehensive income (loss) 46,873           46,909 (36)  
Ending Balance at Sep. 30, 2021 411,654 437 342,014 208,753 (1,040) (138,927) 411,355 299 118
Beginning Balance at Jun. 30, 2021 392,892 436 336,278 195,494 (813) (138,927) 392,586 306 118
Issuance of Common Stock under employee stock plans 3,870 1 3,869       3,870    
Stock-based compensation expense 1,867   1,867       1,867    
Components of comprehensive income (loss), net of tax:                  
Net income (loss) 13,252     13,259     13,259 (7)  
Other comprehensive income (loss) (227)       (227)   (227) 0  
Total comprehensive income (loss) 13,025           13,032 (7)  
Ending Balance at Sep. 30, 2021 411,654 437 342,014 208,753 (1,040) (138,927) 411,355 299 118
Beginning Balance at Dec. 31, 2021 423,905 439 345,664 217,633 (1,328) (138,927) 423,599 306 118
Issuance of Common Stock under employee stock plans 4,147 1 4,146       4,147    
Stock-based compensation expense 7,445   7,445       7,445    
Components of comprehensive income (loss), net of tax:                  
Net income (loss) 17,365     17,384     17,384 (19)  
Other comprehensive income (loss) (1)       49   49 (50)  
Total comprehensive income (loss) 17,364           17,433 (69)  
Ending Balance at Sep. 30, 2022 452,861 440 357,255 235,017 (1,279) (138,927) 452,624 237 118
Beginning Balance at Jun. 30, 2022 445,104 440 352,253 233,225 (2,246) (138,927) 444,863 241 118
Issuance of Common Stock under employee stock plans 2,173   2,173       2,173    
Stock-based compensation expense 2,829   2,829       2,829    
Components of comprehensive income (loss), net of tax:                  
Net income (loss) 1,795     1,792     1,792 3  
Other comprehensive income (loss) 960       967   967 (7)  
Total comprehensive income (loss) 2,755           2,759 (4)  
Ending Balance at Sep. 30, 2022 $ 452,861 $ 440 $ 357,255 $ 235,017 $ (1,279) $ (138,927) $ 452,624 $ 237 $ 118