v3.21.1
NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Revision of Prior Financial Statements (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 03, 2021
Dec. 29, 2019
Revision of prior financial statements    
Revenue $ 121,437 $ 83,555
Operating expenses $ 36,984 $ 22,555
Revision, DSP fees    
Revision of prior financial statements    
Gain (loss) from operations as a percentage of revenue   (1.90%)
Revision, DSP fees | Previously Reported    
Revision of prior financial statements    
Gain (loss) from operations as a percentage of revenue   (2.00%)
Revision, DSP fees | Revision of Prior Period, Reclassification, Adjustment    
Revision of prior financial statements    
Revenue   $ 1,300
Operating expenses   $ 1,300