Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share - Anti-Dilutive Securities (Details)

v3.20.2
Net Income (Loss) Per Share - Anti-Dilutive Securities (Details)
 3 Months Ended 9 Months Ended
Jun. 19, 2020
$ / shares
shares
Sep. 26, 2020
shares
Sep. 28, 2019
shares
Sep. 26, 2020
shares
Sep. 28, 2019
shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares)   263,000 9,661,000 319,000 9,387,000
Performance stock units          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares)         4,000
Restricted stock units          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares)   4,000 35,000 30,000 72,000
Series A Convertible Preferred Stock          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares)     2,771,000   2,771,000
Stock conversion ratio 1        
Minimum weighted average common stock price | $ / shares $ 4.35        
Maintenance of weighted average price trading days 30 days        
Conversion of preferred stock (in shares) 2,620,687        
Options to purchase common stock          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares)   259,000 6,855,000 289,000 6,540,000