	Three Months Ended				Nine Months Ended
	December 31, 2019		December 31, 2018		December 31, 2019		December 31, 2018
	(In thousands)
Weighted average:
Common shares outstanding used in calculating basic net income (loss) per share attributable to Viasat, Inc. common stockholders		61,813		60,152		61,405		59,698
Options to purchase common stock as determined by application of the treasury stock method		90		—		—		—
TSR performance stock options to purchase common stock as determined by application of the treasury stock method		—		—		—		—
Restricted stock units to acquire common stock as determined by application of the treasury stock method		773		—		—		—
Potentially issuable shares in connection with certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan		240		—		—		—
Shares used in computing diluted net income (loss) per share attributable to Viasat, Inc. common stockholders		62,916		60,152		61,405		59,698

Antidilutive shares excluded from the calculation for the three months ended December 31, 2019 consisted of 489,293 shares related to stock options (other than TSR performance stock options), 1,086,737 shares related to TSR performance stock options and 68,256 shares related to restricted stock units.

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 nine months ended December 31, 2019, and the three and nine months ended December 31, 2018, 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 excluded from the calculation for the nine months ended December 31, 2019 consisted of 201,761 shares related to stock options (other than TSR performance stock options), 910,494 shares related to TSR performance stock options, 949,324 shares related to restricted stock units, and 230,588 shares related to certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan. Potentially dilutive weighted average shares excluded from the calculation for the three and nine months ended December 31, 2018 consisted of 1,276,242 and 1,297,427 shares related to stock options (other than TSR performance stock options), respectively, 630,102 and 498,062 shares related to TSR performance stock options, respectively, 1,101,149 and 707,353 shares related to restricted stock units, respectively, and 289,006 and 249,077 shares related to certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan, respectively.