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STOCK-BASED COMPENSATION - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Apr. 01, 2023
Dec. 31, 2023
Shares    
Granted   0
Employee Stock Option [Member]    
Shares    
Outstanding at the beginning 1,914,670 1,914,670
Granted   0
Forfeited   (311,344)
Expired   (82,922)
Outstanding at the end   1,520,404
Vested and expected to vest   1,520,404
Options exercisable at the end   521,173
Weighted-Average Exercise Price per Share    
Outstanding at the beginning (in dollars per share) $ 14.85 $ 14.85
Forfeited (in dollars per share)   11.37
Expired (in dollars per share)   17.75
Outstanding at the end (in dollars per share)   15.40
Vested and expected to vest at the end (in dollars per share)   15.40
Options exercisable at the end (in dollars per share)   $ 16.38
Weighted-Average Remaining Contract Term    
Outstanding at the end (in years)   7 years 11 months 8 days
Vested and expected to vest at the end (in years)   7 years 11 months 8 days
Options exercisable at the end (in years)   7 years 9 months 7 days
Stock Appreciation Rights (SARs)    
Shares    
Granted 790,181 849,058
Forfeited   (93,256)
Outstanding at the end   755,802
Vested and expected to vest   755,802
Weighted-Average Exercise Price per Share    
Granted (in dollars per share) $ 3.24 $ 3.17
Forfeited (in dollars per share)   3.24
Outstanding at the end (in dollars per share)   3.16
Vested and expected to vest at the end (in dollars per share)   $ 3.16
Weighted-Average Remaining Contract Term    
Outstanding at the end (in years)   9 years 4 months 13 days
Vested and expected to vest at the end (in years)   9 years 4 months 13 days
Outstanding at the end (in dollars)   $ 24,729
Vested and expected to vest (in dollars)   $ 24,729