Shares Used In Computing Diluted Net Loss Per Share	6 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]
Shares Used In Computing Diluted Net Loss Per Share	Note 4 — Shares Used In Computing Diluted Net Loss Per Share The weighted average number of shares used to calculate basic and diluted net loss per share attributable to Viasat, Inc. common stockholders is the same for the three and six months ended September 30, 2018 and 2017, as the Company incurred a net loss attributable to Viasat, Inc. common stockholders for such periods and inclusion of potentially dilutive weighted average shares of common stock would be antidilutive. Potentially dilutive weighted average shares of common stock excluded from the calculation for the three and six months ended September 30, 2018 were 1,313,881 and 1,309,180 shares relating to stock options (other than TSR performance stock options), respectively, 630,254 and 480,518 shares relating to restricted stock units, respectively, and 138,478 and 205,030 shares relating to certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan, respectively. Potentially dilutive weighted average shares of common stock excluded from the calculation for the three and six months ended September 30, 2017 were 1,400,231 and 1,381,582 shares relating to stock options, respectively, 598,245 and 545,821 shares relating to restricted stock units, respectively, and 114,770 and 159,524 shares relating to certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan, respectively. No shares relating to TSR performance stock options were excluded from the calculation for the three and six months ended September 30, 2018. The Company began granting TSR performance stock options to executive officers in the third quarter of fiscal year 2018.

Note 4 — Shares Used In Computing Diluted Net Loss Per Share

The weighted average number of shares used to calculate basic and diluted net loss per share attributable to Viasat, Inc. common stockholders is the same for the three and six months ended September 30, 2018 and 2017, as the Company incurred a net loss attributable to Viasat, Inc. common stockholders for such periods and inclusion of potentially dilutive weighted average shares of common stock would be antidilutive. Potentially dilutive weighted average shares of common stock excluded from the calculation for the three and six months ended September 30, 2018 were 1,313,881 and 1,309,180 shares relating to stock options (other than TSR performance stock options), respectively, 630,254 and 480,518 shares relating to restricted stock units, respectively, and 138,478 and 205,030 shares relating to certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan, respectively. Potentially dilutive weighted average shares of common stock excluded from the calculation for the three and six months ended September 30, 2017 were 1,400,231 and 1,381,582 shares relating to stock options, respectively, 598,245 and 545,821 shares relating to restricted stock units, respectively, and 114,770 and 159,524 shares relating to certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan, respectively. No shares relating to TSR performance stock options were excluded from the calculation for the three and six months ended September 30, 2018. The Company began granting TSR performance stock options to executive officers in the third quarter of fiscal year 2018.