Net Loss Per Share	6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]
Net Loss Per Share	Note 3 — Net Loss Per Share Basic loss per share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per share was computed using the weighted average number of common shares outstanding during the period plus potentially dilutive common shares outstanding during the period under the treasury stock method. In computing diluted net loss per share, the weighted average stock price for the period is used in determining the number of shares assumed to be purchased from the exercise of stock options and warrants. For the three and six months ended June 30, 2019 and July 1, 2018, 8.0 million and 7.3 million of common shares associated with equity awards and the estimated number of shares to be purchased under the current offering period of the 2009 Employee Stock Purchase Plan were outstanding, respectively. These shares were not included in the computation of diluted net loss per share as they were considered anti-dilutive due to the net losses the Company experienced during these periods. Warrants to purchase up to 5.4 million shares were issued in connection with May 29, 2018 stock offering were also not included in the diluted loss per share calculation of the three and six months ended June 30, 2019 as they were also considered anti-dilutive due to the net loss the Company experienced during these periods.

Net Loss Per Share

6 Months Ended

Jun. 30, 2019

Note 3 — Net Loss Per Share

Basic loss per share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per share was computed using the weighted average number of common shares outstanding during the period plus potentially dilutive common shares outstanding during the period under the treasury stock method. In computing diluted net loss per share, the weighted average stock price for the period is used in determining the number of shares assumed to be purchased from the exercise of stock options and warrants.

For the three and six months ended June 30, 2019 and July 1, 2018, 8.0 million and 7.3 million of common shares associated with equity awards and the estimated number of shares to be purchased under the current offering period of the 2009 Employee Stock Purchase Plan were outstanding, respectively. These shares were not included in the computation of diluted net loss per share as they were considered anti-dilutive due to the net losses the Company experienced during these periods. Warrants to purchase up to 5.4 million shares were issued in connection with May 29, 2018 stock offering were also not included in the diluted loss per share calculation of the three and six months ended June 30, 2019 as they were also considered anti-dilutive due to the net loss the Company experienced during these periods.