Shares Used In Computing Diluted Net Loss Per Share - Additional Information (Detail)	3 Months Ended
	Jul. 04, 2014	Jun. 28, 2013
Employee Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	910,338	880,132
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	458,801	576,238
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	165,341	139,793