Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Share-Based Compensation - Restricted Stock Units (Details)

v3.19.1
Stockholders' Equity and Share-Based Compensation - Restricted Stock Units (Details) - USD ($)
12 Months Ended
Dec. 29, 2018
Jul. 09, 2018
Dec. 29, 2018
Dec. 30, 2017
Jan. 08, 2018
Jan. 05, 2018
Nov. 08, 2017
Aug. 09, 2017
May 11, 2017
Mar. 30, 2017
Jan. 25, 2017
Jan. 19, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Compensation expense     $ 3,595,000 $ 2,842,000                
Weighted-average period of unrecognized compensation expense     2 years 29 days                  
Restricted Stock Units                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Awards granted (in shares)     1,212,000 1,671,000                
Closing price of grant (in dollars per share)   $ 1.54     $ 2.61 $ 2.62 $ 2.27 $ 2.77 $ 3.93 $ 3.34 $ 3.40 $ 3.61
Compensation expense     $ 2,100,000                  
Unrecognized compensation expense $ 74,000   $ 74,000                  
Weighted-average period of unrecognized compensation expense     1 year 18 days                  
Time-Based RSU Award                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Awards granted (in shares)     510,000 1,144,000                
Awards forfeited (in shares)     10 799,000                
Performance-based RSU Award                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Awards granted (in shares)   131 702,000 527,000                
Shares subject to acceleration 222                      
Number of NEOs $ 2                      
Percentage of performance criteria met 57.40%   57.40%                  
Vested (in shares)     0                  
Awards forfeited (in shares)   292 54 104,000                
Minimum | Restricted Stock Units                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Requisite service period     1 year                  
Maximum | Restricted Stock Units                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Requisite service period     3 years