v3.21.1

NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 03, 2021 | Dec. 29, 2019
Change in contract liabilities |  |
Beginning balance | $ 1,318 | $ 1,998
Revenue recognized | (417) | (680)
Ending balance | 901 | $ 1,318
Estimated future revenues expected to be recognized for performance obligations |  |
Revenue expected to be recognized | 901 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-04 |  |
Estimated future revenues expected to be recognized for performance obligations |  |
Revenue expected to be recognized | $ 95 |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-03 |  |
Estimated future revenues expected to be recognized for performance obligations |  |
Revenue expected to be recognized | $ 95 |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-02 |  |
Estimated future revenues expected to be recognized for performance obligations |  |
Revenue expected to be recognized | $ 95 |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 |  |
Estimated future revenues expected to be recognized for performance obligations |  |
Revenue expected to be recognized | $ 91 |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-12-30 |  |
Estimated future revenues expected to be recognized for performance obligations |  |
Revenue expected to be recognized | $ 84 |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-12-29 |  |
Estimated future revenues expected to be recognized for performance obligations |  |
Revenue expected to be recognized | $ 441 |
Revenue, remaining performance obligation, expected timing of satisfaction, period |  |
Customer loyalty program |  |
Change in contract liabilities |  |
Ending balance | $ 124 |

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