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Shares Used In Computing Diluted Net Income (Loss) Per Share - Additional Information (Detail)
3 Months Ended 6 Months Ended
Oct. 04, 2013
Sep. 28, 2012
Oct. 04, 2013
Sep. 28, 2012
Stock options [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares 14,204 1,566,615 52,603 1,628,482
Restricted stock [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares 0 367,833 41,028 357,005
ViaSat 401(K) Profit Sharing Plan and Employee Stock Purchase Plan [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive shares   97,738   170,920