Shares Used In Computing Diluted Net Loss Per Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Jan. 03, 2014	Dec. 28, 2012	Jan. 03, 2014	Dec. 28, 2012
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	947,362	1,579,179	878,116	1,604,192
Restricted stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares	585,543	388,487	625,587	376,659
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	112,493	140,809	136,767	158,504